Stainless Steel S82012-ANN (Annealed)
Heat-treated state · default condition
UNS S82012
Standard supply condition for plate, sheet, bar and tube; best ductility, phase balance and corrosion resistance.
Values for the ANN condition
Other S82012 tempers and conditions
S82012 is listed in 2 conditions; see the grade overview at S82012.
- ANN
- CD
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefaultThis page Annealed | Standard supply condition for plate, sheet, bar and tube; best ductility, phase balance and corrosion resistance. | 520 | 700 | 35 | 22 HRC | — |
Cold drawn | Pick for straight, close-tolerance bar and wire where extra strength and surface finish are wanted; ductility and impact toughness drop. | 700 | 850 | 20 | 30 HRC | 2.2 % IACS |
What is S82012-ANN?
S82012-ANN is S82012 heat treated to ANN — standard supply condition for plate, sheet, bar and tube; best ductility, phase balance and corrosion resistance. S82012-ANN has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 200 GPa (29 Msi). S82012-ANN has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 57% of stainless steel grades. It melts at 1,420°C (2,588 °F).
Advantages
- Low embodied carbon — 3.2 kg CO₂/kg, better than 95% of stainless steel grades
- High strength — 520 MPa (75.4 ksi), better than 79% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
S82012-ANN properties
Typical room-temperature values for S82012-ANN; 10 are specific to this condition. Other listed values are S82012 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S82012-ANN has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 57% of stainless steel grades. It melts at 1,420°C (2,588 °F).
Mechanical17
S82012-ANN has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S82012-ANN 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
S82012-ANN 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 S82012-ANN takes about 45 MJ of energy and emits 3.2 kg of CO₂ — less than 91% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
S82012-ANN's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability very good (70/100); formability good (55/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S82012-ANN
Is S82012 easy to machine?
Treat like 2205 but tougher than austenitics: rigid setups, positive-rake coated carbide, ~20–30 % lower surface speed than 304, heavy constant feed and flood coolant to cut under the work-hardened layer.
Can S82012 be welded?
GTAW/GMAW/FCAW with over-alloyed duplex filler (2209/2307 type) or a nickel-boosted lean-duplex wire, heat input roughly 0.5–2.0 kJ/mm, interpass below ~150 °C, no preheat and no PWHT; check ferrite 35–65 % on weld and HAZ.
Can S82012 be formed, bent or molded?
Cold forms well but needs ~2× the press force of 304 and generous overbend for springback; hot work 1000–1150 °C with fast cooling, and always re-solution anneal (1000–1100 °C, water quench) after hot forming.
What surface finishes work on S82012?
Pickle/passivate per ASTM A380/A967 (nitric-HF or citric) after welding, remove heat tint by grinding or pickling paste; electropolishes and mechanically polishes reasonably, but the two-phase structure can etch unevenly — not anodisable.
S82012 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 lean duplex; tightened C/N range vs S82011 — verify against current ASTM A240 edition | ≤ 0.03 | 0.02 |
| Mnaustenite stabiliser replacing Ni | 2 – 4 | 3 |
| Si | ≤ 1 | 0.5 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.02 | 0 |
| Cr | 19 – 21 | 20.3 |
| Nideliberately lean to decouple cost from Ni price | 0.8 – 2 | 1.4 |
| Mo | ≤ 0.6 | 0.2 |
| Cu | ≤ 0.6 | 0.3 |
| Ncontrols austenite fraction and pitting resistance | 0.15 – 0.27 | 0.21 |
| Fe | balance | — |
S82012-ANN — frequently asked
What is S82012-ANN used for?
S82012-ANN is typically used for bar and shape stock, fasteners, structural components and storage equipment. In short: low-nickel lean duplex; tight C and N variant; 35% annealed elongation.
What is the yield strength of S82012-ANN?
S82012-ANN has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is S82012-ANN easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Treat like 2205 but tougher than austenitics: rigid setups, positive-rake coated carbide, ~20–30 % lower surface speed than 304, heavy constant feed and flood coolant to cut under the work-hardened layer.
Can S82012-ANN be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/FCAW with over-alloyed duplex filler (2209/2307 type) or a nickel-boosted lean-duplex wire, heat input roughly 0.5–2.0 kJ/mm, interpass below ~150 °C, no preheat and no PWHT; check ferrite 35–65 % on weld and HAZ.
What surface finishes work on S82012-ANN?
Pickle/passivate per ASTM A380/A967 (nitric-HF or citric) after welding, remove heat tint by grinding or pickling paste; electropolishes and mechanically polishes reasonably, but the two-phase structure can etch unevenly — not anodisable.
Can S82012-ANN be formed, bent or molded?
Cold forms well but needs ~2× the press force of 304 and generous overbend for springback; hot work 1000–1150 °C with fast cooling, and always re-solution anneal (1000–1100 °C, water quench) after hot forming.
What is the maximum service temperature of S82012-ANN?
S82012-ANN 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 S82012-ANN and S82012-CD?
ANN is the default condition — standard supply condition for plate, sheet, bar and tube; best ductility, phase balance and corrosion resistance. CD: pick for straight, close-tolerance bar and wire where extra strength and surface finish are wanted; ductility and impact toughness drop. Yield strength is 520 MPa in ANN versus 700 MPa in CD.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A276/A479 — Stainless Steel Bars and Shapes — ASTM International (2022)
- Practical Guidelines for the Fabrication of Duplex Stainless Steels, 3rd ed. — IMOA / ISSF (2014)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Lean duplex stainless (2101/2102/2202 class) datasheets — Outokumpu / ATI / Sandvik (2023)
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.