Stainless Steel 1.4462 S31803
Grade
EN 1.4462 · UNS S32205, S31803 · ASTM A240 S32205 · GB 022Cr23Ni5Mo3N, 022Cr22Ni5Mo3N · also 2205
S31803 = s31803 chemistry
Legacy chemistry with wider Cr/Mo/N windows; still stocked but low-N heats can lose corrosion resistance in the HAZ.
Values for the S31803 condition
Other 1.4462 tempers and conditions
1.4462 is listed in 7 conditions; see the grade overview at 1.4462.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Forged + solution annealed (ASTM A182 F51/F60 flanges and fittings) | Heavy forged flanges, valve bodies and fittings; slightly lower typical strength than plate because of section size. | 500 | 730 | 27 | 22 HRC | 2.2 % IACS |
S31803This page S31803 chemistry | Legacy chemistry with wider Cr/Mo/N windows; still stocked but low-N heats can lose corrosion resistance in the HAZ. | 500 | 740 | 30 | 23 HRC | 2.2 % IACS |
Welded tube/pipe, solution annealed after welding | Lower-cost welded pipe/tube where post-weld solution annealing restores the phase balance and corrosion resistance. | 520 | 750 | 28 | 25 HRC | 2.2 % IACS |
SADefault Solution annealed and quenched | Standard mill-supplied condition for plate, bar, pipe and fittings; balanced 50/50 phase ratio and full corrosion resistance. | 540 | 770 | 30 | 25 HRC | — |
S32205 chemistry | Preferred ordering chemistry today: tighter Cr/Mo/N ranges give more reliable weld corrosion performance and slightly higher strength. | 540 | 780 | 30 | 25 HRC | 2.2 % IACS |
Cold drawn | Bar and shaft stock with better straightness, tighter tolerance and elevated strength for machined fittings, pump shafts and fasteners. | 660 | 860 | 22 | 29 HRC | 2.2 % IACS |
Cold worked high-strength | Choose when maximum strength is needed in umbilical tubing, springs, bolting or downhole hardware and full annealed ductility is not required. | 760 | 950 | 18 | 32 HRC | 2.2 % IACS |
What is 1.4462 S31803?
1.4462 S31803 is 1.4462 in the S31803 grade — legacy chemistry with wider Cr/Mo/N windows; still stocked but low-N heats can lose corrosion resistance in the HAZ. 1.4462 S31803 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi). 1.4462 S31803 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,385°C (2,525 °F). SA is the default condition FabDigit quotes; S31803 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 75/100, better than 79% of stainless steel grades
- High strength — 500 MPa (72.5 ksi), better than 77% of stainless steel grades
Limitations
- Limited service temperature — 250°C (482 °F), worse than 99% of stainless steel grades
1.4462 S31803 properties
Typical room-temperature values for 1.4462 S31803; 22 are specific to this condition. Other listed values are 1.4462 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4462 S31803 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,385°C (2,525 °F).
Mechanical16
1.4462 S31803 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4462 S31803 is rated for continuous service to 250°C (482 °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
1.4462 S31803 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (75/100), better than 79% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4462 S31803 takes about 62 MJ of energy and emits 4.5 kg of CO₂ — more than 75% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
1.4462 S31803's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (70/100); formability fair (46/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4462 S31803
Is 1.4462 easy to machine?
Work-hardens fast and has high cutting forces — use rigid setups, positive-rake coated carbide, heavy constant feed, low-to-moderate speed (~60–110 m/min) and copious coolant; avoid dwelling and re-cutting a hardened skin.
Can 1.4462 be welded?
Readily welded by GTAW/GMAW/SMAW with 2209 filler or nickel-free autogenous only for thin sections; keep heat input 0.5–2.5 kJ/mm, interpass below ~150 °C, use Ar+2 %N2 backing and never PWHT below 1020 °C (sigma/475 °C embrittlement risk).
Can 1.4462 be formed, bent or molded?
Cold forming needs roughly twice the press force of 304 and generous overbend for springback; hot form 950–1150 °C followed by full solution anneal and water quench — never finish-form in the 300–950 °C range.
What surface finishes work on 1.4462?
Pickle and passivate after welding or grinding (HNO3/HF paste) to restore the passive film; electropolishing and mechanical polishing give good hygienic finishes, no anodizing, and avoid carbon-steel contamination during grinding.
1.4462 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 |
|---|---|---|
| CASTM A240 S32205 | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 2 | 1.5 |
| P | ≤ 0.03 | 0.03 |
| SEN 1.4462 limit 0.015 | ≤ 0.02 | 0 |
| CrS31803 range 21.0–23.0 | 22 – 23 | 22.5 |
| Ni | 4.5 – 6.5 | 5.6 |
| MoS31803 range 2.5–3.5 | 3 – 3.5 | 3.2 |
| NS31803 range 0.08–0.20 | 0.14 – 0.2 | 0.17 |
| Fe | balance | — |
1.4462 S31803 — frequently asked
What is 1.4462 S31803 used for?
1.4462 S31803 is typically used for chemical tanks and piping, offshore structures, desalination equipment and marine components. In short: industry workhorse duplex; twice the yield of 316L; widest duplex availability.
What is the yield strength of 1.4462 S31803?
1.4462 S31803 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 77% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is 1.4462 S31803 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Work-hardens fast and has high cutting forces — use rigid setups, positive-rake coated carbide, heavy constant feed, low-to-moderate speed (~60–110 m/min) and copious coolant; avoid dwelling and re-cutting a hardened skin.
Can 1.4462 S31803 be welded?
Yes — weldability is rated very good (70/100). Readily welded by GTAW/GMAW/SMAW with 2209 filler or nickel-free autogenous only for thin sections; keep heat input 0.5–2.5 kJ/mm, interpass below ~150 °C, use Ar+2 %N2 backing and never PWHT below 1020 °C (sigma/475 °C embrittlement risk).
What surface finishes work on 1.4462 S31803?
Pickle and passivate after welding or grinding (HNO3/HF paste) to restore the passive film; electropolishing and mechanical polishing give good hygienic finishes, no anodizing, and avoid carbon-steel contamination during grinding.
Can 1.4462 S31803 be formed, bent or molded?
Cold forming needs roughly twice the press force of 304 and generous overbend for springback; hot form 950–1150 °C followed by full solution anneal and water quench — never finish-form in the 300–950 °C range.
What is the maximum service temperature of 1.4462 S31803?
1.4462 S31803 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4462-SA and 1.4462 CW-HS?
SA is the default condition — standard mill-supplied condition for plate, bar, pipe and fittings; balanced 50/50 phase ratio and full corrosion resistance. CW-HS: choose when maximum strength is needed in umbilical tubing, springs, bolting or downhole hardware and full annealed ductility is not required. Yield strength is 540 MPa in SA versus 760 MPa in CW-HS.
Sources
- ASTM A240/A240M — Cr and Cr-Ni Stainless Plate, Sheet and Strip — ASTM (2023)
- ASTM A790/A789 — Seamless and Welded Ferritic/Austenitic Stainless Pipe and Tube — ASTM (2023)
- EN 10088-1/-2/-3 Stainless steels — CEN (2014)
- GB/T 4237 / GB/T 20878 (022Cr23Ni5Mo3N) — SAC (2015)
- Forta DX 2205 / 2205 Code Plus Two datasheets — Outokumpu / Sandvik (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Practical Guidelines for the Fabrication of Duplex Stainless Steels — IMOA (2014)
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.