Inconel 601 Forging Parts | Alloy 601 | UNS N06601 Forged Components | China Professional Manufacturer

Inconel 601 Forging Parts | Alloy 601 UNS N06601 Forged Components from China Jiangsu Manufacturer

Inconel 601 Forging Parts — Key Facts at a Glance

Common Names: Alloy 601, UNS N06601 (equiv. to Inconel® 601*)
Material Standards: ASTM B166, ASTM B564, AMS 5715
Primary Composition: Ni 58–63%, Cr 21–25%, Fe 6–10%, Al 1–1.7%
Max Operating Temp: 1175°C continuous / 1250°C intermittent
Yield Strength (annealed): ≥ 205 MPa
Tensile Strength (annealed): ≥ 550 MPa
Elongation: ≥ 30%
Hardness: ≤ 210 HB
Forging Weight Range: 30 KGS – 30,000 KGS
Melting Process: VIM + ESR + VAR (Triple Melt)
Held Certification: ISO 9001:2015 Quality Management System
Production Standards: ASTM, ASME, API 6A Spec., AMS, DIN, EN, JIS
Material Compliance: Alloy 601 meets NACE MR0175 / ISO 15156 material requirements; products can be manufactured to support EU PED 2014/68/EU customer qualification
MTC Available: EN10204 3.1 (standard) / 3.2 (with customer-nominated TPI)
NDT Method: UT per AMS-STD-2154, MT/PT surface inspection
Lead Time (standard): 3–4 weeks | Custom: 6–8 weeks
Manufacturer: Jiangsu Liangyi Co., Ltd, Jiangyin, China
Export Markets: 50+ countries globally
Contact: sales@jnmtforgedparts.com | +86-13585067993
*Inconel® is a registered trademark of Special Metals Corporation. UNS N06601 / Alloy 601 refers to the equivalent alloy grade per ASTM/UNS designation.

About Inconel 601 (Alloy 601, UNS N06601) Forging Material

Jiangsu Liangyi Co., Limited is an ISO 9001:2015 certified professional manufacturer of Alloy 601 (UNS N06601, equivalent to Inconel® 601*) open‑die forging parts and seamless rolled forged rings. We are located in Jiangyin City, Jiangsu Province, a big center for forging in China. With more than 25 years of industry experience, we supply high‑performance Alloy 601 forging parts to customers in over 50 countries across North America, Europe, the Middle East, Southeast Asia and Oceania. All our products meet international standards including ASTM, AMS, API 6A Spec., ASME, DIN, EN and JIS.
Alloy 601 (UNS N06601) is a multi‑purpose nickel‑chromium‑iron alloy used for extreme conditions that demand excellent heat and corrosion resistance. Its strongest advantage is excellent high‑temperature oxidation resistance up to 1250°C, improved by its carefully controlled aluminum content of 1.0–1.7%. The alloy also has strong resistance to liquid corrosion in both acidic and alkaline environments, high creep and breaking strength at high temperatures, and good formability, machinability and weldability. With a stable FCC crystal matrix, Alloy 601 stays metallurgically consistent even during long‑term use at high temperatures. Its nickel base and high chromium content provide dependable protection in many corrosive media and extreme working conditions.

*Inconel® is a registered trademark of Special Metals Corporation, a PCC company. "Alloy 601" and "UNS N06601" are the generic ASTM/UNS designations for the equivalent alloy grade. Jiangsu Liangyi Co., Limited has no affiliation with Special Metals Corporation.

Inconel 601 vs. Competitor Alloys: Core Advantages for Forging Applications

As a specialist nickel alloy forging manufacturer in China, we clearly define the unique advantages of Inconel 601 over common alternative alloys, to help you choose the right material for your project:

Alloy Grade	Core Advantages of Inconel 601	Optimal Application Scenario
Inconel 600	Higher aluminum content delivers significantly better high-temperature oxidation resistance; improved creep strength at temperatures above 1000°C	Long-term high-temperature working conditions vs. general corrosion resistance scenarios
310S Stainless Steel	Far greater corrosion resistance in harsh media; higher high-temperature strength; better resistance to thermal cycling and carburization	Extreme high-temperature + corrosive environments vs. low-cost general heat resistance applications
Inconel 625	Better cost performance for high-temperature oxidation applications; excellent weldability for large forged structures; more stable performance in cyclic high-temperature environments	High-temperature oxidation scenarios vs. high-pressure aqueous corrosion applications

Full Range of Inconel 601 Forged Products We Supply

We custom manufacture a full range of Inconel 601 (Alloy 601, UNS N06601) forged products in all kinds of shapes and specifications, and they all fully meet your 2D/3D drawings and technical requirements. Our production capacity covers single-piece weight from 30 KGS to 30,000 KGS, with full in-house production from melting to final machining. Explore our full product catalog for more details.

Core Inconel 601 Forging Product Capabilities

Inconel 601 Forged Bars and Rods: Round, square, flat, rectangular and hollow bars, the max diameter is up to 2000mm, weight is up to 30 tons
Alloy 601 Seamless Rolled Rings: Seamless contoured rings, the max diameter is up to 6000mm, they are the best choice material for rotating and pressure-bearing applications
UNS N06601 Valve Forgings: Valve bodies, bonnets, stems, balls, seat rings for gate, ball, check and globe valves, API 6A compliant
Inconel 601 Hollow Forgings: Housings, shells, sleeves, bushes, pipes, hollow bars, the max OD is up to 3000mm
Custom Inconel 601 Forgings: Discs, plates, shafts, tube sheets, nozzles, turbine parts and custom machined parts

Chemical Composition of Inconel 601 (UNS N06601) Alloy

The chemical composition of our Inconel 601 forging material strictly meets ASTM B166, ASTM B564 and international standards, with element control in our in-house melting workshop to guarantee consistent material performance for every batch:

Element	Content Range (Weight %)	Core Function in the Alloy
Nickel (Ni)	58.0 – 63.0	Provides corrosion resistance, stabilizes the FCC matrix, guarantees ductility and toughness
Chromium (Cr)	21.0 – 25.0	Delivers high-temperature oxidation resistance, improves corrosion resistance in oxidizing media
Iron (Fe)	6.0 – 10.0	Improves structural stability, reduces material cost without compromising core performance
Aluminum (Al)	1.0 – 1.7	Further improves high-temperature oxidation resistance, works with chromium to form protective oxide layer
Carbon (C)	0.10 Max	Controls grain growth, ensures high-temperature strength, avoids carbide precipitation brittleness
Manganese (Mn)	1.5 Max	Improves hot workability, deoxidizes the melt during melting process
Silicon (Si)	0.50 Max	Deoxidizer, improves high-temperature oxidation resistance
Sulphur (S)	0.015 Max	Controls impurity content, ensures machinability and weldability
Copper (Cu)	1.0 Max	Residual element control, ensures consistent corrosion resistance

Mechanical Properties of Alloy 601 Forgings

Our Inconel 601 forging parts are supplied in the solution annealed condition, fully meeting the ASTM B166 standard, with guaranteed mechanical properties tested in our own laboratory. We also offer custom heat treatment to match your specific project needs.

Mechanical Property	Minimum Requirement (Annealed Condition)	Test Standard
0.2% Proof Stress (Yield Strength)	205 MPa	ASTM E8/E8M
Ultimate Tensile Strength	550 MPa	ASTM E8/E8M
Elongation (Breakage)	30%	ASTM E8/E8M
Hardness	≤ 210 HB	ASTM E10

Physical & Thermal Properties of Inconel 601 in Forged Condition

The physical and thermal properties shown below apply to our Inconel 601 material in theforged and solution-annealed condition, produced using our VIM+ESR+VAR triple melt process. Forged Inconel 601 has a refined, directionally controlled grain matrix, which gives it clearly better thermal stability and more consistent physical properties than cast or standard wrought products. Engineers should use the forging‑condition values below for part design calculations, instead of general published minimum specifications.

Physical Property	Value	Condition / Temperature	Engineering Significance
Density	8.11 g/cm³	Room temperature	~3% denser than Inconel 600; used for weight-per-volume calculations in rotating component design
Melting Range	1320 – 1370°C	Solidus to liquidus	Wider solidus-liquidus gap vs. Inconel 600; governs VIM tapping temperature and ingot homogeneity
Modulus of Elasticity (E)	207 GPa (RT) / 168 GPa (600°C) / 124 GPa (900°C)	Forged, annealed condition	Important for thermal fatigue life calculation in cyclic high-temperature service; higher E retention vs. 310S above 700°C
Poisson's Ratio	0.33	Room temperature	Standard FCC nickel-base alloy value; used in finite element analysis (FEA) of pressure vessel and turbine parts
Thermal Conductivity	11.2 W/(m·K) @ RT 16.3 W/(m·K) @ 600°C 22.8 W/(m·K) @ 1000°C	Annealed; measured longitudinal to forging direction	Increases with temperature — advantageous for heat transfer parts; our forged material shows ≤4% anisotropy vs. ~12% in cast equivalents due to controlled grain orientation
Mean Thermal Expansion Coefficient	13.7 μm/(m·°C) @ 21–538°C 15.2 μm/(m·°C) @ 21–1093°C	Average over temperature range	Lower expansion than 310S SS (15.9); important for dissimilar metal joint design in heat exchangers and reactors
Specific Heat Capacity	448 J/(kg·K)	Room temperature	Used for thermal transient and heat storage calculations in regenerative heat exchanger and thermal cycling applications
Electrical Resistivity	1.19 μΩ·m	Room temperature	Relevant for induction heating process design during forging and post-weld heat treatment; significantly higher than ferrous alloys
Magnetic Permeability	≤ 1.01 μr	Annealed condition	Essentially non-magnetic (austenitic FCC structure); important for applications near magnetic instruments or MRI equipment

Based on our production experience, the thermal conductivity of our VIM+ESR+VAR Inconel 601 forgings consistently measures 5–8% higher than the published minimum values for standard wrought sheet of the same alloy. We believe this comes from the improved material cleanliness (fewer inclusions) from our triple melt process, which lowers phonon scattering at grain boundaries. This difference is practically important in heat exchanger tube sheet and radiant tube parts where thermal resistance must be kept as low as possible. Actual measured thermal conductivity data from production can be included in engineering design documents upon request.

High-Temperature Mechanical Properties of Inconel 601 Forgings

The high-temperature mechanical property data below shows reference ranges for solution-annealed Alloy 601 (UNS N06601), annealed at 1160–1175°C and water quenched. These ranges are compiled from published technical literature and industry sources, and checked against our own in-house production test results. Actual values may differ based on chemical composition within the ASTM B166 range, forging reduction ratio, section size, and exact heat treatment settings. This data is for engineering reference and preliminary design only. Certified mechanical test results for each production batch are included in the EN 10204 3.1 MTC supplied with every order. ASTM B166 room-temperature minimum values are also shown for comparison.

Test Temperature	0.2% Yield Strength (MPa)	Ultimate Tensile Strength (MPa)	Elongation (%)	Reduction of Area (%)
RT (20°C) ASTM B166 min: 205 / 550 / 30%	230 – 280	590 – 680	38 – 48	55 – 65
200°C	195 – 235	545 – 620	36 – 46	52 – 62
400°C	175 – 215	495 – 570	36 – 46	52 – 62
600°C	160 – 195	455 – 520	38 – 48	55 – 68
700°C	145 – 180	380 – 445	40 – 52	56 – 70
800°C	125 – 158	285 – 340	42 – 55	60 – 74
900°C	105 – 135	195 – 250	46 – 60	65 – 80
1000°C	82 – 108	145 – 185	50 – 65	68 – 82
1100°C	52 – 72	88 – 120	55 – 72	72 – 88

One clear trait seen in published Alloy 601 data and confirmed by our production experience: Alloy 601 forgings show a steady "strength plateau" between 600°C and 800°C .The drop in yield strength per 100°C rise is much smaller in this range — about 15–20 MPa per 100°C — compared to 800–1000°C, where it falls around 22–30 MPa per 100°C. This effect comes from dynamic strain aging, where carbon atoms hold dislocations in place at medium temperatures. For design engineers, this means Alloy 601 forgings keep nearly consistent load-bearing strength from 550°C to 750°C. That makes the alloy especially good for steam turbine casings and valve body parts where working temperatures stay within this range. If needed for important design approval, certified high-temperature mechanical test data can be arranged through a customer‑chosen testing lab.

Corrosion Resistance Performance Matrix for Inconel 601 Forgings

Unlike general material datasheets that only list corrosive environments as simple bullet points, the matrix below rates how forged Inconel 601 performs in 14 different corrosive conditions. It is compared with the two most common alternative alloys — Inconel 600 and 310S stainless steel — to give purchasing and design engineers a clear, practical comparison. The ratings are based on long‑term service performance from our project experience and published corrosion test data.

★★★★★ Excellent — No measurable attack; recommended for long-term service ★★★★ Good — Minor attack; suitable for most service conditions ★★★ Fair — Moderate attack; acceptable for short-term or low-severity use ★★ Limited — Significant attack; use only with engineering review ✗ Not Recommended

Corrosive Environment	Inconel 601 (Forged)	Inconel 600 (Forged)	310S SS (Wrought)	Key Note
Air / Oxygen (up to 1250°C)	★★★★★	★★★★	★★★	Al₂O₃-Cr₂O₃ dual-layer oxide provides breakthrough performance; 601 outperforms 600 above 1050°C due to Al addition
Steam / Water Vapor (high temperature)	★★★★★	★★★★	★★★	Excellent resistance up to 1175°C; Al₂O₃ layer remains intact in wet oxidizing atmospheres unlike many Fe-Cr-Ni alloys
CO₂ / Flue Gas (combustion environment)	★★★★★	★★★★	★★★	Superior to 310S in mixed oxidizing/reducing flue gas; minimal oxide spalling in thermal cycling conditions
Carburizing Atmospheres (CH₄/CO/H₂)	★★★★	★★★★	★★★	High Cr+Al content provides good carburization barrier; slightly inferior to Haynes 214 in severe carburizing but far superior to 310S
Nitriding Atmospheres (NH₃/N₂)	★★★★	★★★	★★★	Cr₂N formation is suppressed by the Al addition at high temperatures; suitable for ammonia cracking furnace components
Sulfidizing (H₂S / SO₂ / SO₃)	★★★	★★★	★★	601 is NOT recommended for severe sulfidizing without oxidizing co-environment; Al₂O₃ offers limited sulfur barrier — consider Haynes 188 for high-sulfur service above 800°C
Thermal Cycling (repeated quench / heat)	★★★★★	★★★★	★★★	The aluminum oxide scale on Inconel 601 has exceptional adherence under thermal shock — a key reason it is preferred over 600 and 310S in heat treatment fixtures with rapid thermal cycling
Dilute H₂SO₄ (aqueous, <70°C)	★★★★	★★★★	★★★	Nickel base provides good dilute acid resistance; not suitable for concentrated H₂SO₄ — use Alloy 20 or C276 for that environment
Dilute HNO₃ (aqueous, <60°C)	★★★★	★★★★	★★★★	High Cr content (21–25%) provides excellent resistance to oxidizing nitric acid; comparable performance to 310S
Caustic / NaOH / KOH Solutions	★★★★★	★★★★★	★★★★	Nickel-base alloys inherently resist caustic stress corrosion cracking (SCC) that affects austenitic SS; critical advantage for caustic evaporator and NaOH handling equipment
Seawater / Chloride Solutions	★★★	★★★	★★	601 is not the optimal choice for chloride-dominated seawater immersion service; use Inconel 625 or C276 for high-chloride environments
HCl (Hydrochloric Acid, any concentration)	★★	★★	✗	Neither 601 nor 600 is suitable for HCl service; specify Hastelloy C276 or C22 for hydrochloric acid environments
H₂S / CO₂ Sour Gas (NACE MR0175)	★★★★	★★★★	✗	Our Inconel 601 forgings are NACE MR0175/ISO 15156 compliant — the alloy is pre-qualified for sour service without additional hardness restriction (PWHT not required)
High-Pressure Hydrogen (H₂ > 200 bar)	★★★★	★★★★	★★★	Austenitic FCC structure provides inherent resistance to hydrogen embrittlement; nickel content suppresses hydrogen-induced cracking — suitable for hydrogen compression and storage parts.

A main practical detail most material data sheets leave out: Inconel 601 performs much better in mixed oxidizing-carburizing atmospheres (common in ethylene cracking furnaces and steam reformers) than in pure carburizing environments. This is because even tiny amounts of oxygen — as little as 10 ppm — in the gas flow let aluminum keep rebuilding the protective Al₂O₃ layer that carbon penetration partly damages.

Our projects for European petrochemical clients show that Alloy 601 forged tube sheets used in ethylene crackers keep their structural strength for 80,000 to over 100,000 service hours. Carburization does not go deeper than 0.1 mm below the surface, as long as the process atmosphere stays within design limits.

Advanced Melting & Forging Process for Inconel 601 Forgings

To guarantee the highest quality, metallurgical stability and performance of our Inconel 601 forging parts, we use a premium triple melt process for all raw material production, with a full range of control process for all products from melting to final machining. Our advanced forging equipment guarantees accurate shaping even for the most intricate custom forgings:

Premium Triple Melt Process (VIM + ESR + VAR)

All our Inconel 601 material is produced through a rigorous triple melt process, which eliminates impurities, guarantees uniform chemical composition, and improves the overall metallurgical quality of the material. That is important for high-demand applications:

Vacuum Induction Melting (VIM): Melts the raw material in a vacuum environment to remove gas impurities, control chemical composition with high precision, and avoid oxidation during melting.
Electroslag Consumable Electrode Remelting (ESR): Refines the ingot matrix, reduces segregation, improves the uniformity of the material, and improves the corrosion resistance and fatigue performance of the final forging.
Vacuum Arc Consumable Electrode Remelting (VAR): Further refines the grain matrix, eliminates internal defects such as porosity and inclusions, and makes sure the material meets the strict requirements of nuclear power, aerospace and other important applications.

Precision Forging and Heat Treatment Process

Open die forging with 2000T–6300T hydraulic presses and 1T–9T electro-hydraulic hammers, with strict temperature control between 950°C and 1200°C to ensure optimal grain refinement and structural integrity
Seamless ring rolling with 1M–5M CNC rolling machines, producing seamless rings with consistent matrix and great mechanical performance compared to welded rings
Solution annealing treatment in 10 professional heat treatment furnaces, with strict temperature control (1140°C–1175°C) and rapid quenching to maximize the corrosion resistance and high-temperature performance of the alloy
In-house CNC machining center, providing finish machining services to meet your final assembly requirements, with dimensional tolerance up to IT6 level

Weldability & Joining Guide for Inconel 601 Forgings

Inconel 601 has excellent weldability in the forged condition. As a forging manufacturer, we provide the following welding guidance specifically for joining Inconel 601 forgings to other parts — whether to wrought fittings, pipe spools, or dissimilar alloys. The guidance below is based on our direct experience supporting fabricators across nuclear, oil and gas and petrochemical projects globally.

Recommended Welding Processes

GTAW (TIG): Primary process for root pass and important joints; best heat control and oxide-free fusion with Ar or Ar+He shielding
GMAW (MIG): Suitable for fill and cap passes on thicker sections (>12mm) with pulse transfer mode
SMAW (Stick): Acceptable for field repair and non-critical joints using matching covered electrodes
SAW: For large-volume production welds (e.g., tube sheet to shell) with approved flux selection

Filler Metal Selection

ERNiCrFe-11 (AWS A5.14) — Primary filler for GTAW/GMAW; matches 601 composition with Al addition
ENiCrFe-11 (AWS A5.11) — Matching covered electrode for SMAW
ERNiCrMo-3 (Inconel 625 filler) — For dissimilar welds to austenitic SS; great hot cracking resistance in mixed joints
Filler metal certificates to AWS A5.14/A5.11 or EN ISO 18274 available with each order

Preheat & Interpass Temperature

Preheat: Not needed for wall thickness ≤ 25mm; 50–100°C recommended for sections > 50mm to reduce thermal gradient
Interpass temperature: ≤ 177°C (350°F) maximum — important to prevent sensitization and hot cracking in the HAZ
Joint cleanliness: Degrease with acetone; mechanically clean within 25mm of joint to bare metal immediately before welding
Backing gas: Pure argon (99.999%) purge on root side for full-penetration welds

Post-Weld Heat Treatment (PWHT)

Standard service: PWHT not mandatory; as-welded condition acceptable for most applications
Severe corrosive service: Full solution anneal at 1160–1175°C, water quench — restores maximum corrosion resistance in HAZ
Nuclear power applications: PWHT requirements are set by the applicable design codes, such as ASME Section III and RCC-M. Customers are responsible for guaranteeing code compliance and weld procedure qualification under their own quality assurance system. We supply forgings with full traceability documents to support our customers’ WPS/PQR qualification process.
Stress relief only: Not recommended — partial heat treatment can create sensitization without full solution anneal benefit

Dissimilar Metal Joints

Inconel 601 to 316L/321 SS: Use ERNiCrMo-3 filler; butter the SS side with one layer of Ni-base filler before completing the joint
Inconel 601 to carbon steel: Use ENiCrFe-3 filler; preheat CS side to 150°C minimum; design to keep weld in compression
Expansion mismatch: Inconel 601 (13.7 μm/m·°C) vs. 310S SS (15.9 μm/m·°C) — design expansion joints for piping systems > 5m operating above 600°C

Forging-Specific Welding Advantages

Our VIM+ESR+VAR material has <0.008% sulphur content — significantly below the 0.015% ASTM maximum — reducing hot cracking susceptibility in the fusion zone
Controlled grain size (ASTM No.5–7) guarantees uniform HAZ width and more predictable weld penetration vs. cast alternatives
Low residual stress state in annealed forgings reduces distortion during welding of large structures (tube sheets, flanges > Ø600mm)
All our forgings are supplied with weld procedure qualification test coupon material available upon request

Strict Full-Process Quality Control System

We apply a full‑process quality control system to every batch of Inconel 601 forging parts, with complete inspections and tests at every stage from incoming raw materials to finished product delivery. All our inspection procedures follow international standards, and we provide a full Mill Test Certificate (MTC) to EN 10204 3.1/3.2 for every order:

Raw Material Inspection: 100% chemical composition analysis and structural inspection for all incoming billets, guaranteeing no segregation, inclusions or defects
Non-Destructive Testing (NDT): 100% UT inspection compliant with AMS-STD-2154, MT/PT inspection for surface defects, RT inspection available on request
Metallographic Testing: Macro & micrographic examination to control grain size (ASTM No.5 or finer), carbide distribution and structural uniformity
Mechanical Performance Testing: In-house laboratory tensile, hardness, impact and high-temperature performance testing to guarantee compliance with standards

Quality Certifications and Production Standard Compliance

ISO 9001:2015 Quality Management System Certification — Held by Jiangsu Liangyi Co., Limited; covers the full production scope from raw material melting through forging, heat treatment, machining and final inspection
Production to ASTM / ASME / AMS / DIN / EN / JIS Standards — All Alloy 601 (UNS N06601) forgings are manufactured based on these internationally recognized technical specifications; production to standard does not need an enterprise certification license
Manufactured to API 6A Specification — Valve body forgings and wellhead parts are produced to the technical requirements of API Specification 6A; customers requiring API Monogram-licensed products should specify this at the time of inquiry
Alloy 601 Material Meets NACE MR0175 / ISO 15156 Requirements — The UNS N06601 alloy composition and hardness (≤ 35 HRC) inherently satisfy the material suitability requirements of NACE MR0175 / ISO 15156 for sour service; this is a material standard, not an enterprise license; NACE compliance is confirmed by MTC chemical and hardness data
Products Supportable for EU PED 2014/68/EU Customer Qualification — We manufacture to the technical and material requirements that support customers' own PED conformity assessment; CE marking and Declaration of Conformity are the responsibility of the equipment manufacturer (our customer) and their appointed Notified Body
Full Material Traceability — Heat number traceability from VIM melting through final product; traceability records retained for minimum 10 years
Third-Party Inspection Support — We fully support customer-nominated third-party inspectors at our facility at any production stage; we have hosted inspectors from BV, SGS, TÜV and other agencies on behalf of our clients; TPI costs and arrangements are the customer's responsibility
Mill Test Certificate (MTC) — EN10204 3.1 MTC issued as standard with every order; EN10204 3.2 available when customer arranges third-party inspector co-signatory at our facility

Dimensional Capability & Size Range Specifications for Inconel 601 Forgings

The dimensional ranges below show Jiangsu Liangyi’s actual production capacity as of 2026, based on our equipment: 2000T–6300T hydraulic open‑die presses, 1T–9T electro‑hydraulic hammers, and 1M–5M CNC ring rolling machines.

Sizes outside standard ranges can be reviewed — our engineering team will evaluate feasibility for non‑standard requests. All dimensions are available in as‑forged or rough‑machined condition; finish‑machined tolerances are agreed case by case according to your drawing.

Product Type	Min O.D. / Width	Max O.D. / Width	Min Wall / Height	Max Length / Height	Min Weight	Max Weight	Surface Finish Options
Forged Round Bars & Rods	Ø 50 mm	Ø 2,000 mm	—	6,000 mm	5 KGS	15,000 KGS	As-forged, shot blast, rough-turned, finish-turned
Seamless Rolled Rings (Rectangular Profile)	Ø 200 mm	Ø 6,000 mm	30 mm	2,000 mm (face height)	5 KGS	20,000 KGS	As-rolled, shot blast, rough-machined (OD/ID/faces), finish-machined
Seamless Rolled Rings (Contoured / Profiled)	Ø 300 mm	Ø 4,500 mm	25 mm	1,500 mm (face height)	8 KGS	15,000 KGS	Rough-machined or finish-machined to profile drawing
Valve Body Forgings (API 6A / ASME)	DN 25 (1")	DN 1,200 (48")	Per API 6A PSL3 min wall	Per custom drawing	1 KGS	8,000 KGS	Rough-machined (machining allowance 5–15mm), finish-machined to drawing
Hollow Forgings (Cylinders / Shells / Bushes)	OD Ø 80 mm ID Ø 40 mm	OD Ø 3,000 mm ID Ø 2,800 mm	20 mm wall	4,000 mm (length)	5 KGS	25,000 KGS	As-forged, rough-bored, finish-bored/turned to IT7–IT8
Discs & Plates (Flat Die)	Ø 100 mm	Ø 4,000 mm	20 mm thick	1,500 mm thick	3 KGS	30,000 KGS	As-forged, shot blast, surface ground, finish-machined
Tube Sheets & Flange Forgings	Ø 150 mm	Ø 4,000 mm	25 mm	500 mm (height)	5 KGS	18,000 KGS	Rough-machined or finish-machined to ASME B16.5 / custom drawing
Custom Complex Forgings (Turbine / Pump / Reactor)	Per approved 2D/3D drawing — submit drawing for feasibility assessment				30 KGS	30,000 KGS	Rough-machined or fully finish-machined to IT6 tolerance

A note on dimensional tolerances for large‑diameter Inconel 601 forgings: Our ring rolling process gets an outer diameter tolerance of ±3 mm for rings up to Ø2000 mm, and ±5 mm for rings from Ø2000 to Ø6000 mm in the as‑rolled condition, with no extra machining needed. This is tighter than the ASTM A484 standard for large rings, which allows ±6 mm. For important uses such as nuclear pump casings and gas turbine spacer rings, we provide full CNC finish machining. This gets OD/ID concentricity within 0.5 mm and face flatness within 0.3 mm per meter, both possible using our in‑house Ø6000 mm CNC vertical lathe. If you have specific GD&T requirements for flatness, perpendicularity or concentricity, please include these on your drawing for review before production.

Alloy Selection Decision Matrix: When to Specify Inconel 601 vs. Alternatives

One of the most common engineering challenges our clients face is choosing between Inconel 601 and other nickel alloys and high‑temperature steels. The matrix below was developed by our technical team based on 25 years of project experience in nuclear, oil and gas, petrochemical and power generation. It groups alloy selection by operating temperature range and main service environment, and shows where Inconel 601 is the best choice (★ Best Fit), a suitable option, or where another alloy performs better.

Temperature Range	Oxidizing Air / Steam	Carburizing Atmosphere	H₂S Sour Gas (NACE)	High-Temp Thermal Cycling	High-Pressure Aqueous Corrosion	Nuclear Grade
Temperature Range	(air, CO₂, steam)	(CH₄, CO/H₂ mix)	(H₂S+CO₂, downhole)	(furnace cycling, startup/shutdown)	(seawater, acid, chloride)	(PWR, BWR, RCP)
< 400°C	316L SS / 321 SS	316L SS	Inconel 625 / C276	316L SS	C276 / Alloy 20	Inconel 600 / 690
400 – 650°C	310S SS / Alloy 800H	Alloy 800H / HR120	★ Inconel 601	Inconel 600 / 310S	Inconel 625 / C276	★ Inconel 601
650 – 900°C	★ Inconel 601	★ Inconel 601	Limited — use 625	★ Inconel 601	Not applicable	★ Inconel 601
900 – 1100°C	★ Inconel 601 (Best)	★ Inconel 601	Not applicable	★ Inconel 601 (Best)	Not applicable	Inconel 690 preferred
1100 – 1200°C	★ Inconel 601	Haynes 214 preferred	Not applicable	★ Inconel 601	Not applicable	Not applicable
> 1200°C	Haynes 214 / 230	Haynes 214	Not applicable	Haynes 214 / 230	Not applicable	Not applicable

★ = Inconel 601 is the recommended first-choice alloy for this temperature/environment combination based on optimal performance-to-cost ratio. "Best" = Inconel 601 outperforms all common alternatives in this specific combination. Cells showing other alloys indicate that Inconel 601 is not the best choice and a different material should be specified.

A main finding from our project reviews: Engineers often over-specify Inconel 625 for uses in the 650–1000°C oxidizing temperature range, where Inconel 601 offers equal or better oxidation resistance at a much lower material cost. Inconel 625 is an excellent alloy, but its main advantage is its outstanding liquid corrosion resistance (due to molybdenum and niobium additions), not high‑temperature air oxidation. For applications that run entirely in gas phase at high temperatures with no pressure corrosion requirements, Inconel 601 is nearly always the more cost‑effective and technically better choice for oxidation and carburization resistance. Our technical team is glad to review your application conditions and provide a written alloy selection recommendation before quoting — free of charge for qualified engineering inquiries.

Industry Applications & Global Project Cases

Our Inconel 601 (Alloy 601, UNS N06601) forging parts are widely used in important applications across industries that demand excellent high‑temperature resistance, corrosion resistance and high mechanical strength. Below are our representative global project cases, showing our expertise in custom Inconel 601 forging solutions:

Alloy 601 UNS N06601 Forged Parts | Oil Gas Nuclear Power Industrial Application Cases

Nuclear Power Industry (Asian Market)

We have supplied Alloy 601 (UNS N06601) forged parts for nuclear power plant projects in China and Southeast Asia, including reactor coolant pump rotors, impellers, casings and seal chambers. All forgings are manufactured under our ISO 9001:2015 quality system, with full heat‑number traceability from VIM melting through final delivery. We provide EN 10204 3.2 MTC with third‑party inspection witnessed by the customer, plus 100% UT, MT and PT non‑destructive testing. Final nuclear safety classification and regulatory compliance are handled by the equipment integrator in line with applicable national nuclear safety standards.

Oil & Gas Industry (Middle East Market)

We supplied UNS N06601 forged parts for sour gas field projects in Saudi Arabia and the UAE, including Christmas trees, wellhead equipment, casing heads, tubing hangers and valve components. All forgings were produced to meet API Specification 6A, using Alloy 601 with chemical composition and hardness fully compliant with NACE MR0175 / ISO 15156 for H₂S sour service. An EN 10204 3.1 MTC with complete chemical, mechanical and hardness test data was provided for every order.

Power Generation & Turbomachinery (Southeast Asia)

We supplied Inconel 601 turbine forgings for thermal power plants in Thailand and Indonesia, including turbine disks, rotor shafts, blades and casings. These forgings take full advantage of the alloy’s oxidation resistance up to 1250°C, guaranteeing long‑term stable operation with a design service life of 100,000 hours.

Petrochemical Industry (European Market)

We supplied Alloy 601 forged parts for an ethylene plant project in Germany, including tube sheets, heat exchanger nozzles, pressure vessel shells and reactor parts. The forgings were produced to meet the material and dimensional requirements set by the customer’s engineering team, supporting their EU PED 2014/68/EU conformity assessment. CE marking was handled by the equipment manufacturer. In service, the products showed excellent resistance to high‑temperature carburization and acid corrosion.

Frequently Asked Questions (FAQ) About Inconel 601 Forgings

What is the maximum continuous operating temperature of Inconel 601?

Inconel 601 can be used continuously at temperatures up to 1175°C and withstand intermittent exposure up to 1250°C. It has excellent high-temperature oxidation resistance, so it is the best choice material for long-term high-temperature service in thermal power plants, petrochemical furnaces and heat treatment equipment.

What is the difference between Inconel 601 and Inconel 600?

The main difference lies in aluminum content. Inconel 601 contains 1.0–1.7% aluminum, which works with its higher chromium level (21–25%, compared to 14–17% in Inconel 600) to form a highly stable, adhesive Al₂O₃-Cr₂O₃ surface oxide layer. This makes Inconel 601 far better at high-temperature oxidation resistance, especially above 1000°C, and also more resistant to carburization, nitriding and thermal cycling. Inconel 600 is usually chosen for its slightly better aqueous corrosion resistance at lower temperatures and lower cost. For continuous high-temperature use above 900°C, Inconel 601 is the recommended material.

Can custom Inconel 601 forgings be produced according to customer drawings?

Yes. Custom Inconel 601 forgings can be produced based on 2D / 3D drawings and technical specifications. Engineering review is provided on the drawings, with advice on optimizing the forging process. Both single-piece sample orders and large-volume mass production orders are supported.

What is the typical lead time for Inconel 601 forging parts?

For standard Inconel 601 forged bars and rings, the lead time is 3–4 weeks. For custom forgings with finish machining, the lead time is usually 6–8 weeks. Urgent orders can be expedited to a lead time as short as 2–3 weeks.

What certification is provided for each Inconel 601 forging order?

A full Mill Test Certificate (MTC) EN10204 3.1 is provided as standard for every order, including chemical composition, mechanical properties, heat treatment records, NDT reports and material traceability information. EN10204 3.2 certification with third-party inspection is available on request.

Which industries use Inconel 601 forged components?

Inconel 601 forged parts serve six main industries: (1) Nuclear Power – reactor coolant pump rotors, impellers and casings needing strict nuclear-grade material traceability. (2) Oil and Gas – Christmas trees, wellhead equipment, valve bodies and tubing hangers for H₂S/CO₂ sour service. (3) Power Generation – turbine disks, rotor shafts and blades for thermal and combined-cycle power plants. (4) Petrochemical – tube sheets, heat exchanger nozzles and reactor parts for ethylene, cracking and refining. (5) Heat Treatment Equipment – furnace fixtures, radiant tubes and muffle furnace components. (6) Aerospace – high-temperature structural parts eligible for FAA/EASA material certification.

Is third-party inspection available for Inconel 601 forgings?

Yes. Third-party inspection is fully supported at any production stage, including raw material incoming, forging, heat treatment, NDT and final dimension test. Inspection institutions such as Bureau Veritas (BV), SGS and TÜV are regularly used. Third-party inspection fees are borne by the customer. For projects requiring EN 10204 3.2 certification, the third-party inspector witnesses and countersigns the MTC at the manufacturing facility.

Contact Us for Custom Inconel 601 Forging Solutions

Jiangsu Liangyi Co., Limited is your trusted professional manufacturer located in China, specializing in high-quality Inconel 601 forgings, Alloy 601 forged parts and UNS N06601 open die forgings. With more than 25 years of experience in nickel alloy forging, advanced in-house production and testing equipment, and a strict quality control system, we are dedicated to supplying global customers with high-performance products at competitive prices, supported by full customization to your drawings and specifications.

📧 Inquiry Email: sales@jnmtforgedparts.com

📞 Phone / WhatsApp: +86-13585067993

🌐 Website: https://www.jnmtforgedparts.com

📍 Address: Chengchang Industry Park, Jiangyin City, Jiangsu Province, China

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