2.4733 Ni62Cr22W14Mo2 Forging Parts | China ISO 9001 Certified Manufacturer
Jiangsu Liangyi Co., Limited is a top ISO 9001:2015 certified manufacturer of 2.4733 Ni62Cr22W14Mo2 open die forging parts and seamless rolled forged rings located in Jiangyin, Jiangsu Province, China. With over 25 years of professional forging experience, we specialize in custom high-temperature nickel alloy forgings, supplying premium 2.4733 forged parts to aerospace, power generation, petrochemical, and industrial heat treatment customers across more than 50 countries worldwide.
2.4733 Ni62Cr22W14Mo2 — Key Facts at a Glance
- DIN Standard
- 2.4733 / NiCr22W14Mo2
- UNS Equivalent
- N06230 (Haynes 230®)
- Max Continuous Service Temp.
- 1200°C (short-term: 1250°C)
- Density
- 8.97 g/cm³ (0.324 lb/in³)
- Tensile Strength Rm (RT)
- Min 758 MPa
- Tensile Strength Rm (1000°C)
- ~265 MPa (typical)
- Yield Strength Rp0.2 (RT)
- Min 310 MPa
- Elongation (A5)
- Min 40%
- Hardness
- Max HB 241
- Solution Anneal Temp.
- 1163–1191°C, rapid cool
- Certification
- ISO 9001:2015, EN10204 3.1/3.2
- Lead Time (standard bars/rings)
- 15–20 working days
Figure 1: High-quality 2.4733 Ni62Cr22W14Mo2 forged round bars produced by Jiangsu Liangyi
Full Range of 2.4733 Ni62Cr22W14Mo2 Forged Products
We manufacture custom 2.4733 Ni62Cr22W14Mo2 forging products based on international standards and client drawings, with single-piece weight capacity from 30 KG to 30,000 KG. Our complete product range includes:
- Forged Bars & Rods: 2.4733 forged round bars, square bars, flat bars, rectangular bars and step shafts, the max diameter is up to 2000 mm
- Seamless Rolled Rings: Ni62Cr22W14Mo2 seamless rolled rings, contoured forged rings, seal rings and turbine casing rings, the max diameter is up to 6000 mm
- Hollow Forgings: 2.4733 forged sleeves, bushes, housings, shells, heavy-wall cylinders and hollow bars, the max OD is up to 3000 mm
- Turbine & Engine Components: Ni62Cr22W14Mo2 forged turbine blades, discs, impellers, blisks, rotors, casings and fasteners for gas & steam turbines
- Valve & Pressure Parts: 2.4733 forged valve stems, valve seats, valve cores, bonnets, flanges, tube sheets and baffle plates for high-temperature valves and heat exchangers
- Custom Forgings: Ni62Cr22W14Mo2 forged discs, blocks, die blocks, hot work dies, and custom machined parts per client drawings
All our open die forgings are available with full EN10204 3.1/3.2 Mill Test Certificates (MTC) and third-party inspection support by TÜV, SGS, BV and other international authorities.
Available 2.4733 Forging Dimensions by Product Form
The table below summarizes our standard supply capability range for 2.4733 Ni62Cr22W14Mo2 forgings. All dimensions can be customized beyond these ranges — contact us with your specific requirements.
| Product Form | Key Dimensions | Weight Range | Surface Condition |
|---|---|---|---|
| Round Bars / Rods | Dia. Ø20–2000 mm Length up to 6000 mm | 0.5–15,000 kg | Black (as-forged), turned, or ground |
| Flat Bars / Slabs | T: 20–500 mm W: 40–1500 mm L: up to 4000 mm | 5–20,000 kg | Black or milled flat |
| Seamless Rolled Rings | OD: 300–6000 mm ID: 200–5800 mm Height: 50–1000 mm Wall: 30–500 mm | 10–25,000 kg | As-rolled or machined bore/face |
| Forged Discs / Blocks | Dia. up to 3000 mm Height up to 1500 mm Block: up to 3000×1500×800 mm | 50–30,000 kg | Black or face-milled |
| Hollow Cylinders / Sleeves | OD: 100–3000 mm Wall: ≥30 mm Length up to 3000 mm | 20–18,000 kg | As-forged or rough-machined |
| CNC Machined Parts | Per customer drawing 5-axis capability | 0.5–5,000 kg | Finish-machined, Ra 0.8–6.3 μm |
Figure 2: Precision-engineered 2.4733 Ni62Cr22W14Mo2 seamless rolled rings for industrial applications
2.4733 Equivalent Grades & International Standard Cross-Reference
2.4733 Ni62Cr22W14Mo2 has different designations in international standards. The table below gives the complete cross-reference for procurement, specification preparation, and import/export documents. Note that although these designations are technically equivalent, composition tolerances may vary slightly between standards — always confirm the applicable specification with your engineering team.
| Standard System | Designation / Grade | Applicable Standard Documents | Primary Market |
|---|---|---|---|
| DIN (German) | 2.4733 / NiCr22W14Mo2 | DIN 17742, DIN 17750–17754, DIN 17754 | Europe (primary standard) |
| UNS (USA) | N06230 | ASTM B435 (sheet/plate), B572 (rod/bar), B564 (forgings), B622 (tube) | North America, Global |
| Trade Name (USA) | Haynes 230® | Haynes International specification | North America, Aerospace |
| EN (European) | NW6230 / NiCr22W14Mo2 | EN 10095, EN 10302, EN 10028-7 | EU, EEA countries |
| AMS (Aerospace) | AMS 5878 (sheet/strip/plate) AMS 5891 (bar/rod/wire) | SAE Aerospace Material Specifications | Aerospace (US/NATO) |
| ASME (Pressure Vessel) | SB-435, SB-572, SB-564 | ASME BPVC Section II Part B | Pressure equipment (global) |
| GB/T (China) | GH5188 (approximate) | GB/T 14996, GB/T 15067 | China domestic market |
| JIS (Japan) | NW6230 | JIS H4551, JIS H4554 | Japan, Southeast Asia |
| BS (UK) | NA 22 | BS 3072–3076 | UK, Commonwealth countries |
Why Choose 2.4733 Ni62Cr22W14Mo2 Nickel Alloy?
2.4733 (also known as Ni62Cr22W14Mo2) is a carbide‑strengthened nickel‑chromium‑tungsten‑molybdenum superalloy, designed for extreme high‑temperature use above 980°C. Compared with common nickel alloys such as Inconel® 601, Haynes® 214 and 310S stainless steel, it has unmatched performance advantages:
| Performance Index | 2.4733 Ni62Cr22W14Mo2 | Inconel 601 | 310S Stainless Steel |
|---|---|---|---|
| Max Continuous Service Temp. | 1200°C | 1150°C | 1050°C |
| Oxidation Resistance (1000°C) | Excellent | Good | Moderate |
| High-Temp. Creep Strength | Outstanding | Moderate | Poor |
| Carburization & Nitridation Resistance | Excellent | Moderate | Poor |
| Structural Stability at High Temp. | Outstanding | Good | Poor |
Core Material Advantages
Extreme High-Temperature Oxidation Resistance
Excellent oxidation resistance at temperatures above 980°C, further improved by micro-addition of rare earth element lanthanum
Superior High-Temperature Strength
Tungsten and molybdenum solid solution strengthening delivers excellent creep resistance and stress rupture performance
Excellent Corrosion Resistance
Excellent resistance to carburization, nitridation, and high-temperature gas corrosion in harsh industrial environments
Excellent Structural Stability
Stable microstructure and mechanical properties during long-term high-temperature service, no brittle phase precipitation
The "14% Tungsten Advantage": Why Composition Is the Key to 2.4733's Dominance Above 1000°C
Most engineers choosing high-temperature alloys focus on nickel and chromium content. What genuinely separates 2.4733 from competing alloys is its 13–15% tungsten (W) addition — a level rarely achieved in commercial nickel superalloys and the primary reason for its exceptional performance above 1000°C.
Why Tungsten Changes Everything at Extreme Temperatures
Tungsten has the highest melting point of all metals (3422°C). When dissolved into the nickel matrix at 13–15%, it creates profound solid-solution strengthening that remains effective at temperatures where other strengthening mechanisms begin to fail. Specifically:
- At 871°C, 2.4733 retains a tensile strength of about 465 MPa — compared to just ~310 MPa for Inconel 601 at the same temperature.
- At 982°C, where most stainless steels and even some nickel alloys become structurally unreliable, 2.4733 still delivers ~285 MPa tensile strength, sufficient for structural loading in industrial furnaces and gas turbine casings.
- Above 1000°C, the alloy's tungsten carbide (W₂C, WC) precipitates along grain boundaries. While this is often seen as a microstructural concern in other systems, in 2.4733 these carbides are deliberately controlled through the 0.05–0.15% carbon specification to provide grain boundary strengthening — increasing creep rupture life by up to 30% compared to Inconel 601 in long-term exposures.
The Lanthanum Factor
The micro-addition of lanthanum (La) at 0.005–0.05% — often overlooked in material data sheets — plays an important role in oxidation resistance. Lanthanum gathers in the Cr₂O₃ oxide layer and greatly slows its growth by stopping chromium from spreading outward. In real use, parts made from 2.4733 show oxide layer thickness about 40% thinner than similar Inconel 601 parts after 1000 hours at 1100°C, which means longer lifetime and fewer maintenance stops. Understanding these metallurgical mechanisms is why Jiangsu Liangyi invests in VIM+ESR or VIM+VAR double-melt processes — to make sure the tungsten and lanthanum are distributed with the homogeneity needed to realize these performance benefits in the final forging.
Chemical Composition of 2.4733 Ni62Cr22W14Mo2 Alloy
| Element | Min. Content (%) | Max. Content (%) | Role in Alloy |
|---|---|---|---|
| Nickel (Ni) | Balance (~62%) | Austenitic matrix, corrosion resistance base | |
| Tungsten (W) | 13.0% | 15.0% | Primary solid-solution strengthener; creep resistance above 900°C |
| Chromium (Cr) | 20.0% | 24.0% | Oxidation & corrosion resistance; forms Cr₂O₃ scale |
| Carbon (C) | 0.05% | 0.15% | M₆C carbide formation; grain boundary strengthening |
| Molybdenum (Mo) | 1.00% | 3.00% | Secondary solid-solution strengthener; corrosion resistance |
| Aluminum (Al) | 0.2% | 0.5% | Deoxidizer; enhanced oxidation resistance via Al₂O₃ sub-scale |
| Lanthanum (La) | 0.005% | 0.050% | Rare earth addition; reduces oxide scale growth rate by ~40% |
| Manganese (Mn) | 0.30% | 1.00% | Deoxidizer; enhances hot workability |
| Silicon (Si) | 0.25% | 0.75% | Oxidation resistance; deoxidizer |
| Cobalt (Co) | — | 5.00% | Solid solution strengthener (residual from raw materials) |
| Iron (Fe) | — | 3.00% | Controlled residual — higher Fe reduces high-temp. performance |
| Copper (Cu) | — | 0.50% | Controlled tramp element |
| Titanium (Ti) | — | 0.10% | Controlled — avoids TiC competition with M₆C carbides |
| Boron (B) | — | 0.015% | Micro-addition for grain boundary cohesion |
| Phosphorus (P) | — | 0.02% | Controlled harmful impurity |
| Sulfur (S) | — | 0.015% | Controlled harmful impurity |
Mechanical Properties of 2.4733 Ni62Cr22W14Mo2 Forgings
| Mechanical Property | Standard Minimum Requirement | Typical Achieved Value |
|---|---|---|
| Ultimate Tensile Strength (Rm) | Min 758 MPa | 790–860 MPa |
| 0.2% Offset Yield Strength (Rp0.2) | Min 310 MPa | 345–400 MPa |
| Elongation (A5) | Min 40% | 45–55% |
| Reduction in Area (Z) | Min 35% | 50–65% |
| Charpy V-notch Impact (KV) | Min 68 J | 100–150 J |
| Hardness | Max HB 241 | HB 175–220 (typical) |
| Young's Modulus (E) | — | 211 GPa |
High-Temperature Mechanical Properties of 2.4733 Forgings
The following high-temperature tensile data shows typical values from solution-annealed 2.4733 Ni62Cr22W14Mo2 forged bars, tested lengthwise. These values are for engineering reference only; actual design limits should be determined by qualification testing on your specific forging shape and heat number. The way strength stays stable above 871°C sets 2.4733 apart from most competing alloys.
| Test Temperature | Tensile Strength Rm (MPa) | Yield Strength Rp0.2 (MPa) | Elongation A5 (%) | Notes |
|---|---|---|---|---|
| 23°C (Room Temp.) | 790–860 | 345–400 | 45–55 | Standard acceptance condition |
| 538°C (1000°F) | 730–780 | 295–345 | 42–50 | Typical creep-service start point |
| 760°C (1400°F) | 615–665 | 255–290 | 38–48 | Gas turbine compressor casing range |
| 871°C (1600°F) | 450–490 | 230–260 | 38–46 | Important service threshold for many designs |
| 982°C (1800°F) | 265–300 | 185–215 | 50–60 | Industrial furnace part range |
| 1093°C (2000°F) | 130–155 | 110–130 | 65–80 | Maximum design use — creep governs |
Creep rupture reference data: At 871°C / 35 MPa, 2.4733 exhibits a stress rupture life exceeding 1000 hours. At 982°C / 20 MPa, typical rupture life is 500–800 hours depending on grain size and heat treatment. Contact our metallurgical team for application-specific creep allowable data.
Physical & Thermal Properties of 2.4733 Ni62Cr22W14Mo2 Alloy
The physical properties below are essential for thermal stress analysis, finite element modeling (FEM), and heat transfer calculations in engineering design. Note that the high tungsten content (13–15%) makes 2.4733 roughly 10–12% denser than standard nickel alloys — this must be considered when calculating weight limits for rotating parts.
| Property | Value at 23°C (RT) | Value at 500°C | Value at 871°C | Unit |
|---|---|---|---|---|
| Density | 8.97 | — | ~8.75 | g/cm³ |
| Melting Range | 1301–1371°C (2374–2500°F) | °C | ||
| Young's Modulus (E) | 211 | 193 | 172 | GPa |
| Shear Modulus (G) | 82 | 75 | 67 | GPa |
| Poisson's Ratio (ν) | 0.288 | — | — | — |
| Thermal Conductivity (λ) | 8.9 | 14.1 | 18.1 | W/(m·K) |
| Specific Heat (Cp) | 397 | 435 | 473 | J/(kg·K) |
| CTE (mean, 23–93°C) | 12.7 | — | — | μm/(m·K) |
| CTE (mean, 23–538°C) | — | 14.0 | — | μm/(m·K) |
| CTE (mean, 23–871°C) | — | — | 15.6 | μm/(m·K) |
| Electrical Resistivity (ρ) | 1.26 | 1.35 | 1.41 | μΩ·m |
| Thermal Diffusivity (α) | 2.50×10⁻⁶ | — | 4.40×10⁻⁶ | m²/s |
Note: CTE values are mean coefficients over the stated temperature ranges. For FEM analysis, use incremental (instantaneous) CTE values supplied with material certification data. Contact our technical team for full property datasets including Poisson's ratio vs. temperature curves.
Heat Treatment Specifications for 2.4733 Ni62Cr22W14Mo2 Forgings
Correct heat treatment is important to getting the full performance of 2.4733 alloy. Unlike precipitation-hardened nickel alloys, 2.4733 is a solid‑solution strengthened alloy, whose properties are mainly controlled by solution annealing temperature and cooling rate. The table below gives the complete heat treatment specification matrix used in our production process.
| Heat Treatment Step | Temperature Range | Holding Time | Cooling Method | Purpose & Effect |
|---|---|---|---|---|
| Solution Annealing (Primary) | 1163–1191°C (2125–2175°F) | Until temperature equalized throughout section, min 30 min/25 mm thickness | Rapid air cool or water quench (quench for sections >75 mm) | Fully dissolves carbides, restores maximum ductility and corrosion resistance, recrystallizes deformed microstructure |
| Post-Forge Anneal (Intermediate) | 1080–1120°C (1975–2050°F) | Min 1 h per 25 mm of maximum section thickness | Rapid air cool | Grain refinement after multi-pass hot forging; partial carbide dissolution; achieves ASTM grain size ≥ 5 for fatigue-critical applications |
| Stress Relief (Post-Machining / Post-Weld) | 900–960°C (1650–1760°F) | 1–4 hours (depending on section size and residual stress level) | Air cool or furnace cool to 500°C, then air cool | Reduces machining or weld-induced residual stresses without causing full sensitization; suitable for components that cannot go through full solution anneal post-weld |
| Stabilization Aging (Optional — Creep Service) | 700–760°C (1290–1400°F) | 16 hours | Air cool | Pre-precipitates M₆C carbides in controlled fashion; improves long-term creep rupture strength by 10–15% for parts intended for continuous service above 850°C |
| Sensitization Recovery (Post-Weld Full Anneal) | 1163–1191°C (2125–2175°F) | 30 min per 25 mm, min 30 min total | Rapid air cool or water quench | Dissolves Cr-depleted zone at grain boundaries after welding; mandatory for components in corrosive environments; restores full intergranular corrosion resistance |
Our Exclusive Manufacturing Advantages for 2.4733 Alloy Forgings
2.4733 Ni62Cr22W14Mo2 is a high-tungsten nickel superalloy with a narrow hot working window (1050–1200°C), which is prone to cracking and grain coarsening during forging. With over 25 years of experience in nickel alloy forging, we have developed exclusive process solutions:
- Premium Melting Process: All 2.4733 forgings are made by VIM+ESR (Vacuum Induction Melting + Electro-Slag Remelting) or VIM+VAR double melting, we strictly control impurity elements and gas content to guarantee high material purity and fatigue performance
- Precision Hot Forging: Infrared real-time temperature monitoring throughout forging, multi-pass small deformation strategy, avoiding internal cracks and guaranteeing consistent fine-grained microstructure (ASTM grain size ≥ 5)
- Customized Heat Treatment: Standard solution anneal (1163–1191°C) with option for stabilization aging (700°C for 16 hours); heat treatment parameters adjustable per application to optimize strength, toughness, and corrosion resistance
- Full-Process Quality Control: Full-process traceability from raw ingot to finished part; in-house chemical analysis (OES + ICP), mechanical testing lab, metallographic inspection, and NDT capabilities ensure 100% conformance
Our forging workshop is equipped with 2000T–6300T hydraulic forging presses, 1–5T electro-hydraulic forging hammers, 1–5M seamless rolling machines and 10+ heat treatment furnaces with thermocouple-certified temperature uniformity.
Machining & Fabrication Guidelines for 2.4733 Ni62Cr22W14Mo2 Forgings
2.4733 alloy is much harder to machine than stainless steels and standard nickel alloys. Its high tungsten content causes rapid work hardening, and grain boundary carbides speed up tool wear. The values below are Jiangsu Liangyi’s recommended starting parameters based on in-house CNC machining experience — actual settings should be adjusted according to machine rigidity, tool brand, and part shape.
Key Machining Characteristics
- Work hardening rate: Very high — work-hardened surface layer can be 2–3× harder than the bulk material
- Tool wear mechanism: Primarily abrasive wear from tungsten carbides and adhesive wear (built-up edge)
- Heat generation: Very low thermal conductivity in the cutting zone; requires aggressive coolant application
- Key principle: Always cut below the work-hardened layer from previous passes — use deeper depth of cut rather than multiple shallow passes
Recommended Machining Parameters
Grinding Parameters
| Operation | Wheel Type | Wheel Speed | Work Speed | Infeed |
|---|---|---|---|---|
| Surface grinding | CBN or Al₂O₃ vitrified, 46–60 grit | 25–33 m/s | 10–20 m/min | 0.01–0.025 mm/pass |
| Cylindrical grinding | CBN or Al₂O₃, 46–80 grit | 30–35 m/s | 8–15 m/min | 0.005–0.015 mm/pass |
| Internal grinding | Al₂O₃ or CBN, 60–80 grit | 20–30 m/s | 5–12 m/min | 0.003–0.010 mm/pass |
5-Step Specification Checklist: How to Order 2.4733 Forgings Without Errors
After processing thousands of 2.4733 forging orders from more than 50 countries, our engineering team has identified the five specification decisions that most frequently cause delays, disputes, or in-service failures. Use this checklist before submitting your RFQ.
- Specify the governing standard AND the grade designation together.
Example: "2.4733 per DIN 17754" or "UNS N06230 per ASTM B564 Class 1" Using only "Haynes 230" or "nickel alloy" without a specified standard causes uncertainty — different standards permit different composition ranges and may need different documentation. If your end customer needs EN10204 3.2 (third-party witnessed inspection), include this in your RFQ — it will influence production scheduling and cost.
- State the required heat treatment condition.
Options: (a) As-forged [lowest cost, not recommended for service], (b) Solution-annealed [standard — best corrosion resistance and ductility], (c) Solution-annealed + stabilization-aged [best creep performance for 850°C+ service]. If you do not specify, you will receive the manufacturer's default — which may not match your design assumption. Always state: "Supply in solution-annealed condition, 1163–1191°C, rapid air cooled."
- Specify grain size requirement for fatigue-critical applications.
Grain size is not automatically controlled unless specified. For fatigue‑important uses such as rotating parts and pressure‑cycled parts, specify "ASTM grain size ≥ 5 (fine grain)". For creep‑important applications including static furnace parts and parts under sustained high‑temperature load, coarser grain (ASTM 3–5) may offer better creep rupture life — specify as needed. We can adjust our forging and heat treatment process to get your needed grain size and verify it by metallographic testing per ASTM E112.
- Define NDT requirements explicitly.
Minimum standard: 100% UT testing per ASTM A388, which is included as our standard service. For more important applications, you may also request: PT (dye penetrant test) per ASTM E165 to detect surface flaws; MT (magnetic particle test — note: demagnetization is needed because cold working can create slight ferromagnetism); and/or RT (radiographic test) for intricate-shaped parts. Without clear NDT requirements written out, disagreements often happen about inspection results after delivery.
- Confirm dimensional tolerances and machining allowance.
Open die forgings are supplied with forging tolerances (typically +5mm/-0mm on important dimensions for rough forgings, tighter for near-net shapes). If you need machining stock for your own machining, specify: "Supply with 5 mm machining allowance on all surfaces". When ordering finished machined parts, provide a finished drawing including material specs, tolerances (h6/H7 etc.), surface roughness (Ra), and any GD&T requirements. Unclear tolerance requirements are the most common reason for rework expenses.
Ready to submit your RFQ? Our technical team reviews all RFQs within 24 hours and will flag any specification gaps before production begins — preventing delays and ensuring the final product meets your application requirements.
Global Industry Standards & Certifications
Our 2.4733 Ni62Cr22W14Mo2 forgings can be made and documented to support customer qualification under the following international standards and market requirements:
- European Union: EN material standards (EN 10095, EN 10302); material documentation supporting customer PED 2014/68/EU and AD 2000 Merkblatt qualification; suitable for Germany, France, Italy and other EU markets
- North America: Material meeting ASTM B564 chemical and mechanical requirements; ASME BPVC Section II Part B material properties; material documentation supporting customer AMS aerospace qualification; suitable for USA and Canada markets
- Oil & Gas Industry: Material properties meeting API 6A material requirements; NACE MR0175/ISO 15156 material compliance (by alloy chemistry and hardness); suitable for Middle East, Russia, and North America oil and gas projects
- Power Generation Industry: Material documentation compatible with GE, Siemens, and Mitsubishi turbine material specifications; suitable for global thermal power and gas turbine projects
- Quality System: ISO 9001:2015 certified quality management system; qualified NDT personnel with documented competency; calibrated in-house testing laboratory
Global Project Cases & Targeted Applications
2.4733 Ni62Cr22W14Mo2 forgings are widely used in important industrial fields needing long-term service under extreme high temperature, high pressure, and corrosive environments:
EU Power Generation & Aerospace Project
Markets: Germany, France, Italy
Applications: We have supplied 2.4733 forgings including LPT turbine casings, combustion cans, transition ducts and flame holders to European aerospace firms and thermal power plants, complete with material documentation supporting customer qualification under PED 2014/68/EU.
Middle East Oil & Gas Project
Markets: Saudi Arabia, UAE, Oman
Applications: We have supplied customized 2.4733 forgings including valve stems, valve seats, bonnets and high-temperature furnace parts for petrochemical projects in the Middle East, with material properties fully meeting API 6A and NACE MR0175 requirements.
North America Gas Turbine Project
Markets: USA, Canada
Applications: We have supplied 2.4733 forgings including turbine blades, discs, impellers, fasteners and thermocouple protection tubes for North American land‑based gas turbine projects, with complete material documentation complying with ASME B564 requirements.
Southeast Asia Power Generation Project
Markets: Thailand, Indonesia, Malaysia
Applications: We have supplied 2.4733 forged reheat valve discs, valve spindles, tube sheets and heat shields for biomass and geothermal power plants in Southeast Asia.
Australia Mining & Heat Treatment Project
Markets: Australia, New Zealand
Applications: We have supplied customized 2.4733 forged heat-treating baskets, grates, trays, nitriding furnace internals and hot work die blocks for Australian mining and heat treatment enterprises.
Global Chemical Process Industry Project
Markets: Worldwide
Applications: We have supplied 2.4733 forged catalyst grid supports for ammonia burners, high-temperature heat exchangers, bellows, sparger tubes and cyclone internals for large-scale chemical projects.
Quality Control & Non-Destructive Testing (NDT)
All our 2.4733 Ni62Cr22W14Mo2 forging parts are given strict full-process quality control:
Standard Testing Procedures
- Raw Material Inspection: OES + ICP chemical composition analysis, gas content testing (O, N, H by LECO fusion), incoming material traceability verification to VIM ingot heat number
- Forging Process Inspection: Continuous infrared pyrometer monitoring, deformation ratio control per forge plan, in-process microstructure sampling
- Heat Treatment Inspection: Thermocouple-calibrated furnace temperature uniformity verification, hardness testing on every heat treatment batch and grain size metallographic examination per ASTM E112
- Non-Destructive Testing (NDT): 100% Ultrasonic Testing (UT) per ASTM A388; Dye Penetrant Testing (PT) per ASTM E165; Magnetic Particle Testing (MT); Radiographic Testing (RT) as specified
- Mechanical Property Testing: Tensile testing per ASTM E8/E21, Charpy V-notch impact per ASTM E23, high-temperature tensile as required by customer specification
- Final Inspection: 3D CMM dimension test, surface finish measurement (contact profilometer), documentation package review and sign-off
All NDT procedures are carried out by qualified inspectors with formal certification records. Full material traceability is kept from the original ingot heat number to the final inspection report, and included in the material documentation package provided to customers. Third-party witnessing of NDT is available upon request through internationally recognized inspection bodies.
Technical FAQ for 2.4733 Ni62Cr22W14Mo2 Forgings
The following questions address the most common technical and commercial inquiries we get from global customers about 2.4733 alloy forgings:
2.4733 alloy can be used continuously at temperatures up to 1200°C and has excellent oxidation resistance above 980°C. For short‑term service, it can withstand temperatures as high as 1250°C. This performance is far superior to Inconel 601 (maximum 1150°C continuous) and 310S stainless steel (maximum 1050°C continuous). It has high‑temperature strength, oxidation resistance and structural stability, so that it is the best choice material for extreme high‑temperature industrial parts used in furnaces, turbines and chemical reactors.
2.4733 alloy can be welded using TIG (GTAW) and MIG (GMAW) welding processes with matching filler metals (AWS ERNiCrWMo or equivalent Haynes 230W wire). Main welding parameters: no preheating needed; interpass temperature controlled below 150°C; heat input kept at 0.5–1.5 kJ/mm. For parts used in corrosive environments, we strongly recommend full solution annealing at 1163–1191°C followed by rapid cooling after welding — this removes the chromium-depleted sensitized zone formed during welding cooling. We supply welded components and corresponding WPS (Welding Procedure Specifications) as needed.
2.4733 (DIN standard) and Haynes 230® (the trade name for UNS N06230) are basically the same alloy — both are Ni-22Cr-14W-2Mo with a small amount of lanthanum added. The different names come from different standard systems: DIN 2.4733 is the European material number, while N06230 is the UNS number used in ASTM/ASME standards. When it comes to mechanical properties, corrosion resistance, and maximum service temperature, they can be used in place of each other. The only small difference is that DIN 2.4733 has a slightly stricter requirement for La content (0.005–0.050%), while Haynes 230 products may have small differences in specific composition targets within the N06230 range. When buying, just state either name and mention the relevant standard (DIN or ASTM) to meet all purchasing requirements.
Yes. We provide one-stop service from raw material melting, forging, heat treatment to final CNC machining. Our equipment includes 5-axis CNC machining centers (max swing Ø2500 mm), floor-type boring and milling machines, heavy-duty lathes, and surface grinders. Recommended parameters for 2.4733: carbide tools at 25–40 m/min for roughing, with high-pressure coolant. We can reach a surface finish of Ra 0.8 μm for sealing and bearing parts. We can also supply semi-finished forgings with machining allowance for your own machining, together with material certificates, grain size reports, and NDT records.
Standard forged bars and seamless rings (solution-annealed, black surface): 15–20 working days. Custom intricate forgings with full CNC machining: 30–45 working days. Expedited production for urgent orders: 10–15 working days (surcharge may apply). We keep a standing inventory of 2.4733 / N06230 VIM+ESR ingots specifically to support fast-response orders. For large-volume contracts, we offer quarterly delivery schedules with reserved production capacity.
Grain size is an important but frequently overlooked specification parameter for 2.4733 components. The relationship is application-dependent:
For fatigue-dominated loading (rotating components, pressure-cycled vessels, reciprocating parts): fine grain (ASTM ≥ 5) is preferred. Fine grain boundaries act as crack arrest barriers, improving high-cycle fatigue life by 15–30% compared to coarse-grained material.
For creep-dominated loading (static furnace internals, sustained high-temperature structural parts): A coarser grain (ASTM 3–4) can greatly improve creep rupture life, since fewer grain boundaries mean fewer paths for creep deformation to spread. At 982°C and 20 MPa, material with ASTM grain size 3 can have a rupture life 30–40% longer than material with ASTM grain size 7. We can adjust our forging and heat treatment process to reach your needed grain size, which will be verified by metallographic testing according to ASTM E112. Please state your needed ASTM grain size in your RFQ, and we will confirm if it can be achieved for your forging cross-section.
The density of 2.4733 Ni62Cr22W14Mo2 is 8.97 g/cm³ (0.324 lb/in³). This is roughly 10–12% higher than common nickel alloys such as Inconel 601 (8.11 g/cm³) or 310S stainless steel (7.98 g/cm³). The higher density comes directly from the 13–15% tungsten content — tungsten has an atomic weight of 183.8 and is the densest element used in standard engineering alloys. For rotating parts like turbine discs and impellers, this density difference must be included in centrifugal stress calculations. A turbine disc made of 2.4733 will create about 10% higher centrifugal loads at the same RPM as an Inconel 601 disc with the same shape. This is usually acceptable because 2.4733 also has much higher strength, but it must be verified in your stress analysis.
Standard documentation package (included with every order):
- EN10204 3.1 Mill Test Certificate (MTC): Full chemical analysis (all specified elements), tensile and elongation at room temperature, hardness, heat treatment records with thermocouple data
- NDT Reports: UT inspection report (per ASTM A388), PT/MT report as applicable
- Dimensional Inspection Report: CMM or manual measurement records per customer drawing
- Metallographic Report: Grain size determination per ASTM E112 (if specified)
- Material Traceability Certificate: Linking finished forging to raw ingot heat number and VIM/ESR melt records
Optional (available on request): EN10204 3.2 MTC (third-party witnessed by TÜV, SGS, BV, or Lloyd's); high-temperature tensile test results; Charpy impact test results; corrosion test reports; NACE MR0175 compliance statement.
Yes. 2.4733 Ni62Cr22W14Mo2 is a corrosion-resistant alloy (CRA) containing more than 62% nickel. It naturally resists sulfide stress cracking (SSC) and hydrogen-induced cracking (HIC), the main failure modes covered by NACE MR0175/ISO 15156.
According to NACE MR0175 / ISO 15156-3, Table B.3, nickel alloys with over 50% nickel may be used in sour service with no hardness limits, as long as they are in the solution-annealed condition. Our 2.4733 forgings are delivered solution-annealed, with typical hardness HB 175–220, which is well below HRC 35. We can provide material test reports and heat treatment records to support your NACE MR0175 / ISO 15156 material selection documents. Your pressure equipment authority or Certifying Body will give the final compliance confirmation.
There is no strict minimum order quantity. We accept orders from a single prototype piece (minimum forging weight 30 KG per piece) up to large production runs of over 100,000 KG. For prototype and R&D orders, we offer flexible scheduling — orders can usually be finished in 15–20 working days when raw material is in stock. For total orders over 5,000 KG, we provide favorable pricing and dedicated production capacity. Contact our sales team with your estimated annual volume to talk about a long-term supply agreement.
Based on reviewing thousands of customer RFQs over 25 years, these are the most frequent specification errors:
- Not specifying heat treatment condition → Get as-forged material instead of solution-annealed; properties do not match design calculations. Fix: Always state "solution-annealed per [governing standard]".
- Omitting grain size requirement for fatigue applications → Get coarse-grained forgings with reduced fatigue life. Fix: State "ASTM grain size ≥ 5, confirmed by metallographic examination per ASTM E112".
- Using carbon steel handling equipment during machining → Carbon contamination creates sensitized areas that fail in corrosive service. Fix: Use stainless steel or dedicated nickel alloy tooling; clean contact surfaces with acetone before machining.
- Skipping post-weld solution anneal → Heat-affected zone becomes sensitized; intergranular corrosion fails in service. Fix: Mandate PWSA (post-weld solution anneal) at 1163–1191°C in your welding procedure specification.
- Wrong filler metal selection for welding → Weld metal cracking or property mismatch. Fix: Specify AWS ERNiCrWMo (Haynes 230W equivalent) or matching-composition filler explicitly in the welding procedure specification.
Global Supply & Customization Capability
As a professional China 2.4733 forging manufacturer, we provide flexible customization and global supply solutions:
- Customization Scope: Custom shapes and sizes per your drawings, from 30 KG small parts to 30,000 KG heavy forgings; near-net-shape forging to minimize your machining cost
- Production Mode: Single prototype to large-batch production; dedicated lot traceability maintained throughout
- Global Delivery: FOB Shanghai, CIF, DDP and other Incoterms; long-term freight forwarder partnerships; VCI anti-corrosion export packaging standard for all sea freight shipments
- Technical Support: Metallurgical engineers available for material selection guidance, forging process optimization, failure analysis consultation, and post-delivery technical support
- Third-Party Inspection: TÜV, SGS, BV, Lloyd's — we accommodate all major international inspection agencies in our facility
Inquire About 2.4733 Ni62Cr22W14Mo2 Forging Parts
Jiangsu Liangyi Co., Limited is your reliable global supplier of high-quality 2.4733 Ni62Cr22W14Mo2 forging parts. Whether you need standard forged bars and rings, or custom intricate turbine parts, we provide the best solution. Send your drawings, material requirements, quantity, and application details for a detailed technical quotation within 24 hours.
Contact Our Forging Experts Today
Get in touch for a competitive quote and technical consultation on your 2.4733 application.
sales@jnmtforgedparts.com
+86-13585067993
www.jnmtforgedparts.com
Chengchang Industry Park, Jiangyin City, Jiangsu Province, China