1.4529 (X1NiCrMoCuN25-20-7) Forging Parts | China ISO-Certified Forging Manufacturer
ISO 9001:2015 certified custom open die forgings, seamless rolled rings & precision machined components for global industrial applications
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Get Free Quote in 24h- PREN > 42 — better corrosion resistance than 316L (PREN ≈24)
- UNS N08926 / AISI 926 — equivalent designation in American standards
- Weight range: 30 kg – 30,000 kg per piece
- Standards: EN 10088, EN 10250-4, ASTM, API 6A, NORSOK
- MTC: EN 10204 3.1 & 3.2 provided for all products
- Lead time: 10–35 working days (expedited available)
- Capacity: 120,000 tons/year — factory since 1997
- Uses: FGD, desalination, oil & gas, nuclear, chemical industries
- MOQ: 30 kg — prototype to mass production
1. 1.4529 (X1NiCrMoCuN25-20-7) Material Overview
Jiangsu Liangyi Co., Limited (est. 1997) is an ISO 9001:2015 certified open die forging manufacturer headquartered in Jiangyin City, Jiangsu Province, China. With 27+ years of experiences, the company serves 50+ countries across oil & gas, nuclear power, chemical and marine engineering industries. All products have EN 10204 3.1/3.2 Mill Test Certificates.
Jiangsu Liangyi is a professional maker of 1.4529 (also known as X1NiCrMoCuN25-20-7) open die forging parts and seamless rolled steel forged rings in China. It has over 27 years of experience serving customers from more than 50 countries worldwide.
We provide full custom products from steel melting, forging, heat treatment to precision machining, strictly according to clients' drawings and technical manuals.
1.4529 is a high-alloyed super austenitic stainless steel, also classified as a nickel alloy per American standards. According to ISO standards and ASTM International classifications, when it is delivered in supersaturated solid state, it has great resistance to intercrystalline corrosion, pitting corrosion, and stress corrosion cracking.
It performs well even in harsh environments including salt, seawater, high-concentration chloride ions, sulfuric acid, phosphoric acid, and other aggressive chemicals in both liquid and gaseous forms. Its PREN (Pitting Resistance Equivalent Number) exceeds 42, significantly superior to standard 316L stainless steel (PREN ~24).
This material is widely used in the chemical, paper, cryogenic, aerospace, power generation, oil & gas, and marine industries. Main end uses include heat exchangers, chemical storage tanks, industrial pumps, valves, aircraft parts, bushings, shafts, seawater desalination equipment, flue gas desulphurisation (FGD) systems, and pressure vessels.
Request Custom Quote2. 1.4529 Forged Product Shapes
We can make 1.4529 (X1NiCrMoCuN25-20-7) forging parts in both standard and custom shapes, with weight ranging from 30 kg to 30,000 kg, fully accordance with international standards. Our main products are as below:
2.1 1.4529 Forged Bars & Shafts
1.4529 forged steel round bars, square bars, flat bars, rectangular bars, step shafts, gear shafts, crankshafts, turbine shafts, and others as per customers' drawings. All these are with strict dimensional tolerance control and uniform internal material structure.
2.2 1.4529 Seamless Rolled Forged Rings
X1NiCrMoCuN25-20-7 seamless rolled rings, gear rings, slewing bearing rings, contoured rolled rings, flange blanks, gasket blanks, and other shapes as per customers' drawing. Ideal for pressure vessel, pipeline, and heavy machinery uses.
2.3 1.4529 Forged Hollow & Casing Parts
1.4529 forged hubs, housings, shells, sleeves, bushes, hollow bars, casings, barrels, and other hollow parts as per customers' drawing. All these parts are with internal structure uniformity and have passed non-destructive testing.
2.4 1.4529 Forged Discs, Blocks & Plates
X1NiCrMoCuN25-20-7 forged discs, disks, blocks, plates, and custom flat forgings which are widely used for valve bodies, pump parts, and machinery structural parts.
2.5 1.4529 Forged Parts for Heat Exchangers & Pressure Vessels
1.4529 forged steel pipes, tubes, tubings, tube sheets, baffle plates, nozzles, channel flanges, and other parts per customers' drawings for boilers, heat exchangers, pressure vessels, reactors, and industrial heaters uses.
Send Drawing for Customization3. 1.4529 (X1NiCrMoCuN25-20-7) Chemical Composition & Mechanical Properties
3.1 Chemical Composition ( As Per EN 10088 Standard)
The following chemical composition data are per EN 10088-1 for 1.4529 / X1NiCrMoCuN25-20-7:
| Element | C | Si | Mn | Ni | P | S | Cr | Mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| Content (wt%) | max 0.02 | max 0.5 | max 1 | 24–26 | max 0.03 | max 0.01 | 19–21 | 6–7 | 0.15–0.25 | 0.5–1.5 |
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3.2 Mechanical Properties of 1.4529 Forged Round Bars (EN 10250-4)
Note: +A = Solution Annealed; +AT = Solution Annealed + Aged
| Mechanical Property | Condition +A | Condition +AT |
|---|---|---|
| Tensile Strength Rm (MPa) | 650–850 | 600–800 |
| 0.2% Proof Strength Rp0.2 (MPa) | 300–340 | 270–300 |
| Min Elongation at Fracture A (%) | 35–40 | 35 (Long.) / 30 (Trans.) |
| Max Brinell Hardness (HB) | 250 | 220 |
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3A. 1.4529 International Standard (EN / UNS / AISI / W.Nr)
1.4529 steel is named differently under different international standards. The table below provides the full cross-reference for engineers and procurement teams by American (UNS / AISI), European (EN / W.Nr), or German (DIN) standards:
| Standard System | Designation | Full Name / Grade | Key Standard Documents |
|---|---|---|---|
| EN (European) | 1.4529 / X1NiCrMoCuN25-20-7 | Super Austenitic Stainless Steel | EN 10088-1, EN 10250-4, EN 10272 |
| UNS (ASTM/ASME) | N08926 | Alloy 926 / 25-6Mo | ASTM B625, ASTM B649, ASME SB-625 |
| AISI (American) | 926 / Grade 926 | 25Cr-20Ni-6Mo-0.2N | AISI/SAE designation |
| W.Nr (Werkstoff) | 1.4529 | Werkstoffnummer 1.4529 | DIN / SEW standards |
| Common Trade Names | 25-6Mo, Alloy 926, 6XN | Super austenitic / "6Mo" grades | different manufacturer names |
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Note: While 1.4529 (EN), N08926 (UNS), and AISI 926 share the same nominal composition, minor differences may exist. Always check the standard for your project. Jiangsu Liangyi can produce to any of these names with full MTC certification.
Check Standard for Your Order3B. 1.4529 vs 316L vs 2205 Duplex — Material Comparison
When choosing stainless steel for different uses such as seawater desalination, FGD systems, and offshore oil & gas, understanding the differences is critical. The table below compares 1.4529 with (N08926) the widely-used 316L and 2205 Duplex (1.4462) in main technical parameters:
| Property | 1.4529 / N08926 ⭐ | 316L (1.4404) | 2205 Duplex (1.4462) |
|---|---|---|---|
| PREN Value | > 42 | ≈ 24 | ≈ 35 |
| Cr Content (%) | 19–21 | 16–18 | 21–23 |
| Ni Content (%) | 24–26 | 10–14 | 4.5–6.5 |
| Mo Content (%) | 6–7 | 2–3 | 2.5–3.5 |
| N Content (%) | 0.15–0.25 | ≤40.10 | 0.10–0.22 |
| Tensile Strength (MPa) | 650–850 | 485–690 | 620–880 |
| Seawater Resistance | Excellent | Limited | Good |
| Chloride SCC Resistance | Excellent | Poor | Good |
| FGD / Acid Environment | 3× longer life vs 316L | Baseline | Better than 316L |
| Microstructure | Full Austenitic | Full Austenitic | Duplex (50/50) |
| Weldability | Good | Excellent | Good (requires care) |
| Typical Applications | FGD, desalination, nuclear, offshore | General chemical, food | Moderate chloride, structural |
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💡 Conclusion: 1.4529 (N08926) is better than both 316L and 2205 Duplex in high-chloride, high-acid, and seawater environments due to its better PREN value (>42), high molybdenum (6–7%) and nitrogen content. It is the best material when 316L fails and 2205 Duplex is not enough.
Get Material Selection Advice4. Production & Inspection Standards
All our 1.4529 forging parts are produced and tested in strict accordance with international industrial standards, with full traceability documentation. We provide EN 10204 3.1/3.2 Mill Test Certificates (MTC) for all delivered products.
4.1 Core Production Standards
- EN 10088 Series: Stainless steels – Technical delivery conditions for semi-finished products, bars, rods, sheets, strips and sections
- EN 10028-7: Flat products made of steels for pressure purposes – Stainless steels
- EN 10216-5 / EN 10217-7: Seamless and welded steel tubes for pressure purposes – Stainless steel tubes
- EN 10253 Series: Butt-welding pipe fittings – Wrought austenitic and duplex stainless steels
- EN 10272: Stainless steel bars for pressure purposes
- EN 10250-4: Open steel die forgings for general engineering purposes – Stainless steels
- EN 10297-2: Seamless circular steel tubes for mechanical and general engineering purposes – Stainless steel
- ASTM / ASME, API 6A, NORSOK, AISI standards upon request
4.2 Inspection & Testing Standards
- ASTM A604: Macroetch testing of consumable electrode remelted steel bars and billets
- ASTM E112: Standard test methods for determining average grain size
- EN ISO 6892 Series: Metallic materials – Tensile testing at ambient and high temperatures
- ISO 204:2009: Metallic materials – Uniaxial creep testing in tension
- EN 10204: Metallic products – Types of inspection documents
- EN ISO 148-1: Metallic materials – Charpy pendulum impact test
- EN ISO 6506-1: Metallic materials – Brinell hardness test
- EN ISO 9712: Non-destructive testing (NDT) – Qualification and certification of NDT personnel
- EN ISO 9001: Quality management system
5. Production Capability & Melting
We handle all production in-house for X1NiCrMoCuN25-20-7 forging parts, from raw material melting to final heat treatment, machining and inspection, which ensures full-process quality control.
Our advanced forging and testing equipment ensure we can handle large-scale and custom orders with short lead times.
5.1 Good Melting
To get the highest material purity required for critical industrial uses, all our 1.4529 forging material is produced using strictly controlled melting processes:
- Double Melting: VIM (Vacuum Induction Melting) + VAR (Vacuum Arc Remelting)
- Triple Melting: VIM + ESR (Electroslag Remelting) + VAR (for nuclear, aerospace, and offshore oil & gas applications)
5.2 Main Forging & Heat Treatment Equipment
- Forging Presses: 2,000T, 4,000T, 6,300T Open Die Hydraulic Presses with manipulators up to 60T lifting capacity
- Forging Hammers: 0.75T to 9T Electro Hydraulic Forging Hammers
- Rolling Equipment: 1M and 5M Seamless Ring Rolling Machines
- Heating Equipment: Forging furnaces with max capacity 150T; hydrogen bake-out furnaces up to 14M
- Heat Treatment: Semi-automatic system, furnaces up to 18M length, quenching tanks up to 16M
- Full set of chemical, mechanical, metallographic and non-destructive testing equipment
5.3 Step-by-Step Manufacturing Process
- Step 1 — Raw Material Melting: VIM+VAR (double melt) or VIM+ESR+VAR (triple melt for nuclear/aerospace) to get highest purity 1.4529 billet.
- Step 2 — Forging / Ring Rolling: Open die forging on 2,000T–6,300T hydraulic presses or seamless ring rolling; single piece 30–30,000 kg.
- Step 3 — Solution Annealing Heat Treatment: +A or +AT condition per EN 10250-4 in furnaces up to 18M, rapid quench in tanks up to 16M.
- Step 4 — 100% Non-Destructive Testing (NDT): UT / MT / PT per EN ISO 9712; all results recorded.
- Step 5 — Precision CNC Machining (optional): To get sizes, surface finish Ra, and tight tolerances as per drawing.
- Step 6 — Final Inspection & EN 10204 MTC: Chemical, mechanical, dimensional reports issued; documents kept for 15+ years.
6. Industry Uses & Cases
6.1 Main Industries
Our 1.4529 stainless steel forgings are widely used in industries with hard corrosion, high pressure and high temperature working conditions, including:
- Flue Gas Desulphurisation (FGD) & Environmental Protection
- Seawater Desalination & Marine Engineering
- Nuclear Power & Thermal Power Generation
- Chemical Processing & Pharmaceutical Industry
- Onshore & Offshore Oil & Gas Exploitation
- Cryogenic Equipment & Aerospace
- Pressure Vessel & Heat Exchanger Manufacturing
- Industrial Valve & Pump Manufacturing
6.2 Actual Project Cases
Below are actual cases of our 1.4529 forging parts in global industrial projects, they all work well in harsh working conditions. View more global projects in our project reference page.
Case 1: Thermal Power Plant Flue Gas Desulphurisation (FGD) System
Region: Southeast Asia
Products Supplied: 1.4529 forged valve bodies, valve stems, slurry circulation pump impellers, shafts and flanges
Project Details: 660MW supercritical thermal power unit FGD absorption tower system, with medium of high-concentration chloride ion and sulfuric acid mixed slurry, operating temperature 60–80°C
Result: 1.4529 forged parts get a service life more than 3× longer than traditional 316L stainless steel, reducing equipment downtime and maintenance costs significantly. Have been working stably for 5+ years.
Case 2: Large-Scale Seawater Desalination RO Plant
Region: Middle East
Products Supplied: 1.4529 forged tube sheets, channel flanges, high-pressure vessel nozzles and valve components
Project Details: 100,000 m³/d large-scale seawater desalination project, high-salinity seawater medium, system working pressure 6–8 MPa
Result: 1.4529 parts worked well with long-term resistance to pitting and crevice corrosion, fully meeting the 15-year design service life requirement.
Case 3: Offshore Deep Sea Oil & Gas Christmas Tree System
Region: South China Sea
Products Supplied: 1.4529 forged casing heads, tubing heads, valve bodies, christmas tree components and flanges
Project Details: 1,500 m deep water oil and gas field development, medium with high H₂S, CO₂ and chloride ion concentrations, working pressure above 70 MPa
Result: 1.4529 forged parts fully accordance with API 6A standard, with good acid medium corrosion and stress cracking resistance, meeting stringent deep-sea exploitation requirements.
Case 4: Third-Generation Nuclear Power Reactor Coolant System
Region: China (AP1000)
Products Supplied: 1.4529 forged reactor coolant pump casings, impellers, shaft sleeves and seal chamber parts
Project Details: Domestic AP1000 third-generation nuclear power unit, high-temperature and high-pressure boron-containing cooling water, long-term operating pressure 15.5 MPa, temperature 290°C
Result: 1.4529 forgings passed all nuclear-grade material tests, including 100% NDT, so the parts could work safely and stably.
7. Frequently Asked Questions (FAQ) About 1.4529 Forging Parts
1.4529 (also known as X1NiCrMoCuN25-20-7) is a high-alloyed super austenitic stainless steel with good pitting and crevice corrosion resistance, high strength, and good weldability. It features a PREN (Pitting Resistance Equivalent Number) greater than 42. It is widely used in demanding industries which require high chloride, acid and high-temperature conditions, including FGD systems, seawater desalination, and oil & gas.
8. Quality Assurance & Inquiry
As an ISO 9001:2015 certified forging manufacturer with over 27 years of experience in China, Jiangsu Liangyi supplies high-quality 1.4529 (X1NiCrMoCuN25-20-7) forging parts with strict full-process quality control. We will do 100% non-destructive testing and surface check for all products before delivery.
Contact Us for Custom 1.4529 Forging Parts
Company: Jiangsu Liangyi Co.,Limited
Inquiry Email: [email protected]
Phone/WhatsApp: +86-13585067993
Official Website: https://www.jnmtforgedparts.com
Factory Address: Chengchang Industry Park, Jiangyin City, Jiangsu Province, 214400, China
Send Your Drawing for a Free QuoteWe welcome your inquiry for custom 1.4529 (X1NiCrMoCuN25-20-7) forging parts, and we will provide professional technical solutions and competitive quotations within 24 hours.