Stainless Steel S82031 Annealed
Temper · default condition
UNS S82031
Standard stocked condition for plate and pressure-vessel work; balanced ~50/50 ferrite-austenite, best corrosion and toughness.
Values for the Annealed 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 |
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 |
AnnealedDefaultThis page 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 Annealed?
S82031 Annealed is S82031 in the Annealed temper — standard stocked condition for plate and pressure-vessel work; balanced ~50/50 ferrite-austenite, best corrosion and toughness. S82031 Annealed has a yield strength of 610 MPa (88.5 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 87% of stainless steel grades. Elongation at break is 33% and the elastic modulus is 200 GPa (29 Msi). S82031 Annealed 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).
Advantages
- High strength — 610 MPa (88.5 ksi), better than 87% 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
S82031 Annealed properties
Typical room-temperature values for S82031 Annealed; 10 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 Annealed 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 Annealed has a yield strength of 610 MPa (88.5 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 87% of stainless steel grades. Elongation at break is 33% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S82031 Annealed 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 Annealed conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (66/100), better than 59% of stainless steel grades.
Sustainability4
Producing a kilogram of S82031 Annealed 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 Annealed's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (70/100); formability fair (48/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S82031 Annealed
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 Annealed — frequently asked
What is S82031 Annealed used for?
S82031 Annealed 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 Annealed?
S82031 Annealed has a typical yield strength of 610 MPa (88.5 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 87% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is S82031 Annealed easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% 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 Annealed 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 Annealed?
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 Annealed 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 Annealed?
S82031 Annealed 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.