Stainless Steel 1.4410
EN 1.4410 · UNS S32750 · ASTM A240 S32750 · GB 022Cr25Ni7Mo4N · also SAF 2507
EN 1.4410 (UNS S32750, SAF 2507, X2CrNiMoN25-7-4) is a 25Cr-7Ni-4Mo-N super duplex stainless with PREN above 40 and a corrosion score of 88, making it the reference grade for chloride pitting and crevice corrosion service.
Reference datasheet — 1.4410 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the SA condition
1.4410 tempers and conditions
1.4410 is supplied in 4 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault Solution annealed and water quenched | Standard supply condition for plate, sheet, bar, pipe and fittings; best corrosion resistance and toughness. | 600 | 850 | 30 | 27 HRC | — |
Forged + solution annealed (ASTM A182 F53) | Flanges, valve bodies and heavy forgings; verify ferrite balance and impact at low temperature in thick sections. | 600 | 840 | 27 | 28 HRC | 2.2 % IACS |
Cold drawn / cold finished bar | Use where higher strength, tight tolerance and good surface are needed on small-diameter bar; lower ductility and toughness. | 780 | 950 | 20 | 31 HRC | 2.2 % IACS |
Cold worked high-strength tube/bar | Specify when very high yield strength is required in small-section tube or fasteners; toughness and formability drop and ferrite phase is stressed. | 900 | 1,050 | 15 | 34 HRC | 2.2 % IACS |
Supply forms, finishes and certifications
Ways 1.4410 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
SA-BAR-HF | Hot finished bar, solution annealed | Supply form |
SA-Plate | Hot rolled plate, solution annealed + pickled | Supply form |
SA-SHEET | Cold rolled sheet/strip, solution annealed | Supply form |
SA-TUBE | Seamless / welded tube and pipe, solution annealed | Supply form |
What is 1.4410?
EN 1.4410 (UNS S32750, SAF 2507, X2CrNiMoN25-7-4) is a 25Cr-7Ni-4Mo-N super duplex stainless with PREN above 40 and a corrosion score of 88, making it the reference grade for chloride pitting and crevice corrosion service. Solution-annealed plate, sheet, bar, tube and forgings give 600 MPa yield, 850 MPa tensile and 30 % elongation at 270 HB (27 HRC), with cold-worked high-strength bar also on file. Cost, low machinability and strict heat-input control are the trade-offs, and service is capped near 300 °C to avoid sigma-phase and 475 °C embrittlement; 1.4462 (2205) is the step down where PREN 35 suffices. 1.4410 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F). 1.4410 has a yield strength of 600 MPa (87 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4410 used for?
- offshore oil & gas piping
- seawater handling systems
- desalination plants
- chemical tankers
Advantages
- Good corrosion resistance — 88/100, better than 97% of stainless steel grades
- High strength — 600 MPa (87 ksi), better than 86% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- High embodied carbon — 5.5 kg CO₂/kg, worse than 77% of stainless steel grades
1.4410 properties
Typical room-temperature values for 1.4410-SA; bars are the position among stainless steel grades.
Physical3
1.4410 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Mechanical16
1.4410 has a yield strength of 600 MPa (87 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4410 is rated for continuous service to 300°C (572 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 13 µm/m·K (7.22 µin/in·°F).
Electrical3
1.4410 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 97% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4410 takes about 65 MJ of energy and emits 5.5 kg of CO₂ — more than 79% of stainless steel grades. Typical recycled content is 65%.
Manufacturability8
1.4410's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability good (60/100); formability fair (35/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4410 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4410
Is 1.4410 easy to machine?
Machines like a tough, work-hardening stainless: rigid setup, sharp positive-rake carbide, low speed (~50–70 % of 316L), heavy positive feed to cut under the hardened layer, flood coolant.
Can 1.4410 be welded?
Weldable by GTAW/GMAW/SMAW with 25-9-4-N overalloyed filler (e.g. ER2594); keep heat input ~0.5–1.5 kJ/mm, interpass <150 °C, N2-backed root, no preheat and no PWHT — post-weld pickling restores the passive film.
Can 1.4410 be formed, bent or molded?
Hot work 1100–1230 °C followed by full solution anneal at 1040–1120 °C plus rapid water quench; cold forming needs ~2× the force and springback allowance of 316L, and heavily cold formed parts should be re-annealed.
1.4410 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow C to avoid carbide precipitation | ≤ 0.03 | 0.02 |
| Si | ≤ 0.8 | 0.4 |
| Mn | ≤ 1.2 | 0.8 |
| P | ≤ 0.04 | 0.02 |
| Susually ≤0.010 for good hot workability | ≤ 0.02 | 0 |
| Cr | 24 – 26 | 25 |
| Ni | 6 – 8 | 7 |
| Mo | 3 – 5 | 4 |
| Naustenite stabiliser, raises PREN | 0.24 – 0.32 | 0.28 |
| Cu | ≤ 0.5 | 0.2 |
| Fe | balance | — |
What surface finishes work on 1.4410?
Not anodisable; pickle in HNO3-HF and passivate per ASTM A967, or electropolish — never leave weld heat tint or embedded iron in seawater service.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4410 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S32750
- ASTM
- A240 S32750
- EN / DIN / Werkstoff-Nr.
- X2CrNiMoN25-7-4
- GB (China)
- 022Cr25Ni7Mo4N
- Trade names
- SAF 2507
- Other
- 2507
How much does 1.4410 cost?
1.4410 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4410 — frequently asked
What is 1.4410 used for?
1.4410 is typically used for offshore oil & gas piping, seawater handling systems, desalination plants and chemical tankers. In short: benchmark super duplex grade; PREN above 40; seawater-service stainless.
What is the yield strength of 1.4410?
1.4410 has a typical yield strength of 600 MPa (87 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 86% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4410 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Machines like a tough, work-hardening stainless: rigid setup, sharp positive-rake carbide, low speed (~50–70 % of 316L), heavy positive feed to cut under the hardened layer, flood coolant.
Can 1.4410 be welded?
Yes — weldability is rated good (60/100). Weldable by GTAW/GMAW/SMAW with 25-9-4-N overalloyed filler (e.g. ER2594); keep heat input ~0.5–1.5 kJ/mm, interpass <150 °C, N2-backed root, no preheat and no PWHT — post-weld pickling restores the passive film.
What surface finishes work on 1.4410?
Not anodisable; pickle in HNO3-HF and passivate per ASTM A967, or electropolish — never leave weld heat tint or embedded iron in seawater service.
Can 1.4410 be formed, bent or molded?
Hot work 1100–1230 °C followed by full solution anneal at 1040–1120 °C plus rapid water quench; cold forming needs ~2× the force and springback allowance of 316L, and heavily cold formed parts should be re-annealed.
What is the maximum service temperature of 1.4410?
1.4410 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4410-SA and 1.4410 CW-HS?
SA is the default condition — standard supply condition for plate, sheet, bar, pipe and fittings; best corrosion resistance and toughness. CW-HS: specify when very high yield strength is required in small-section tube or fasteners; toughness and formability drop and ferrite phase is stressed. Yield strength is 600 MPa in SA versus 900 MPa in CW-HS.
How much does 1.4410 cost?
1.4410 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip — ASTM International (2023)
- ASTM A479/A479M and A182 (F53) — Bar and Forgings for Pressure Vessels/Piping — ASTM International (2023)
- EN 10088-2/-3 — Stainless steels, X2CrNiMoN25-7-4 (1.4410) — CEN (2014)
- GB/T 4237 / GB/T 1220 — (022Cr25Ni7Mo4N) — SAC (2015)
- Sandvik SAF 2507 / SAF 2507 tube and bar datasheets — Alleima (Sandvik Materials Technology) (2022)
- Outokumpu 2507 (EN 1.4410) Duplex data sheet — Outokumpu (2021)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.