Stainless Steel 1.4410 CW-HS
Supply condition
EN 1.4410 · UNS S32750 · ASTM A240 S32750 · GB 022Cr25Ni7Mo4N · also SAF 2507
CW-HS = 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.
Values for the CW-HS condition
Other 1.4410 tempers and conditions
1.4410 is listed in 4 conditions; see the grade overview at 1.4410.
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 |
CW-HSThis page 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 |
What is 1.4410 CW-HS?
1.4410 CW-HS is 1.4410 supplied in the CW-HS condition — specify when very high yield strength is required in small-section tube or fasteners; toughness and formability drop and ferrite phase is stressed. 1.4410 CW-HS has a yield strength of 900 MPa (131 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 15% and the elastic modulus is 200 GPa (29 Msi). 1.4410 CW-HS 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). SA is the default condition FabDigit quotes; CW-HS is available on request or by drawing note.
Advantages
- High strength — 900 MPa (131 ksi), better than 98% of stainless steel grades
- Good corrosion resistance — 85/100, better than 92% of stainless steel grades
Limitations
- Difficult to machine — 18/100, worse than 99% of stainless steel grades
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
- Limited formability — 12/100, worse than 93% of stainless steel grades
- Limited ductility — 15%, worse than 89% of stainless steel grades
- Difficult to weld — 45/100, worse than 79% of stainless steel grades
1.4410 CW-HS properties
Typical room-temperature values for 1.4410 CW-HS; 22 are specific to this condition. Other listed values are 1.4410 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4410 CW-HS 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 CW-HS has a yield strength of 900 MPa (131 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 15% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4410 CW-HS is rated for continuous service to 280°C (536 °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 CW-HS conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 92% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4410 CW-HS 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 CW-HS's machinability is poor (18/100, worse than 99% of stainless steel grades); weldability fair (45/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4410 CW-HS
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.
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.
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 | — |
1.4410 CW-HS — frequently asked
What is 1.4410 CW-HS used for?
1.4410 CW-HS 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 CW-HS?
1.4410 CW-HS has a typical yield strength of 900 MPa (131 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 98% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4410 CW-HS easy to machine?
Not especially — machinability is rated poor (18/100, worse than 99% 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 CW-HS be welded?
With care — weldability is rated fair (45/100). 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 CW-HS?
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 CW-HS 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 CW-HS?
1.4410 CW-HS is rated for continuous use to about 280°C (536 °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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.