Stainless Steel S82031 AsWelded
Other
UNS S82031
Reference condition for fabricated joints: strength matches base metal but toughness and pitting resistance drop if ferrite exceeds ~65 %.
Values for the AsWelded condition
Other S82031 tempers and conditions
S82031 is listed in 4 conditions; see the grade overview at S82031.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
hot rolled/forged bar, solution annealed | Bar and forging stock per ASTM A276/A479 for shafts, flanges and valve bodies. | 590 | 760 | 34 | 23 HRC | 2.2 % IACS |
AsWeldedThis page weld metal / HAZ, no post-weld solution anneal | Reference condition for fabricated joints: strength matches base metal but toughness and pitting resistance drop if ferrite exceeds ~65 %. | 600 | 760 | 25 | 25 HRC | 2.2 % IACS |
AnnealedDefault solution annealed and quenched (hot-rolled plate, 1D/1E finish) | Standard stocked condition for plate and pressure-vessel work; balanced ~50/50 ferrite-austenite, best corrosion and toughness. | 610 | 780 | 33 | 24 HRC | — |
Cold drawn | Choose for tight tolerance bar and higher strength fasteners/pins; reduced ductility and toughness. | 750 | 900 | 20 | 30 HRC | 2.2 % IACS |
What is S82031 AsWelded?
S82031 AsWelded is S82031 in the AsWelded condition — reference condition for fabricated joints: strength matches base metal but toughness and pitting resistance drop if ferrite exceeds ~65 %. S82031 AsWelded has a yield strength of 600 MPa (87 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi). S82031 AsWelded has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F). Annealed is the default condition FabDigit quotes; AsWelded is available on request or by drawing note.
Advantages
- High strength — 600 MPa (87 ksi), better than 86% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
- Low fracture toughness — 90 MPa·√m (81.9 ksi·√in), worse than 75% of stainless steel grades
S82031 AsWelded properties
Typical room-temperature values for S82031 AsWelded; 23 are specific to this condition. Other listed values are S82031 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S82031 AsWelded has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical17
S82031 AsWelded has a yield strength of 600 MPa (87 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S82031 AsWelded 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
S82031 AsWelded conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 62% of stainless steel grades.
Sustainability4
Producing a kilogram of S82031 AsWelded takes about 53 MJ of energy and emits 3.6 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
S82031 AsWelded's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability very good (70/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S82031 AsWelded
Is S82031 easy to machine?
Treat like 2205 at ~70 % of its speeds: rigid setup, sharp positive-rake carbide, heavy positive feed to cut under the work-hardened layer, and flood coolant.
Can S82031 be welded?
GTAW/GMAW/SMAW with 2209-type over-alloyed filler and Ar+1–2 % N2 shielding; keep heat input ~0.5–2.0 kJ/mm and interpass below 150 °C to hold 30–65 % ferrite.
Can S82031 be formed, bent or molded?
Cold form with ~2× the press force of 304 and generous overbend for springback; hot form 950–1150 °C followed by full solution anneal and water quench.
What surface finishes work on S82031?
Pickle (HNO3/HF) or bead-blast plus passivation after welding to remove heat tint; electropolishing gives the best corrosion surface — do not anodize.
S82031 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 carbon to avoid sensitisation | ≤ 0.05 | 0.03 |
| Si | ≤ 1 | 0.5 |
| Mnraises N solubility | ≤ 2 | 1.4 |
| P | ≤ 0.04 | — |
| S | ≤ 0.03 | — |
| Cr | 19 – 22 | 20.7 |
| Nilean Ni — cost driver | 2 – 4 | 3 |
| MoMo addition vs Mn-N lean duplex | 0.6 – 1.4 | 1 |
| Naustenite stabiliser, boosts PREN and strength | 0.14 – 0.24 | 0.19 |
| Cu | ≤ 1 | 0.3 |
| Fe | balance | — |
S82031 AsWelded — frequently asked
What is S82031 AsWelded used for?
S82031 AsWelded is typically used for process piping, pressure equipment, storage tanks and structural components. In short: mo-bearing lean duplex; 610 MPa annealed yield; better pitting than S82011.
What is the yield strength of S82031 AsWelded?
S82031 AsWelded has a typical yield strength of 600 MPa (87 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 86% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is S82031 AsWelded easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Treat like 2205 at ~70 % of its speeds: rigid setup, sharp positive-rake carbide, heavy positive feed to cut under the work-hardened layer, and flood coolant.
Can S82031 AsWelded be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/SMAW with 2209-type over-alloyed filler and Ar+1–2 % N2 shielding; keep heat input ~0.5–2.0 kJ/mm and interpass below 150 °C to hold 30–65 % ferrite.
What surface finishes work on S82031 AsWelded?
Pickle (HNO3/HF) or bead-blast plus passivation after welding to remove heat tint; electropolishing gives the best corrosion surface — do not anodize.
Can S82031 AsWelded be formed, bent or molded?
Cold form with ~2× the press force of 304 and generous overbend for springback; hot form 950–1150 °C followed by full solution anneal and water quench.
What is the maximum service temperature of S82031 AsWelded?
S82031 AsWelded 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 S82031 Annealed and S82031-CD?
Annealed is the default condition — standard stocked condition for plate and pressure-vessel work; balanced ~50/50 ferrite-austenite, best corrosion and toughness. CD: choose for tight tolerance bar and higher strength fasteners/pins; reduced ductility and toughness. Yield strength is 610 MPa in Annealed versus 750 MPa in CD.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip — ASTM International (2023)
- ASTM A790/A928 — Duplex Stainless Steel Pipe — ASTM International (2022)
- Practical Guidelines for the Fabrication of Duplex Stainless Steels — IMOA (2014)
- 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.