Stainless Steel S32520 FORG+SA
Heat-treated state
UNS S32520
FORG+SA = forged, solution annealed and quenched
For flanges, valve bodies and heavy fittings; requires post-forge anneal to restore phase balance and dissolve sigma.
Values for the FORG+SA condition
Other S32520 tempers and conditions
S32520 is listed in 6 conditions; see the grade overview at S32520.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FORG+SAThis page Forged, solution annealed and quenched | For flanges, valve bodies and heavy fittings; requires post-forge anneal to restore phase balance and dissolve sigma. | 600 | 830 | 27 | 26 HRC | 2 % IACS |
Hot rolled plate, solution annealed and quenched | Pick for pressure-vessel and tank plate; supplied hot rolled, annealed, pickled (1D/No.1 finish). | 610 | 840 | 30 | 26 HRC | 2 % IACS |
SADefault Solution annealed (~1050–1100 °C) and water quenched | Default condition for plate, bar, pipe and fittings — balanced 50/50 austenite/ferrite with no intermetallics, best corrosion and toughness. | 620 | 850 | 30 | 26 HRC | 2 % IACS |
Hot finished bar/billet, solution annealed | Standard round/flat bar for machined valve bodies, shafts and flanges up to large diameters. | 620 | 850 | 28 | 26 HRC | 2 % IACS |
Cold rolled sheet/strip, solution annealed and pickled | Thin sheet and strip for fabricated linings and formed parts where a smooth 2B surface is needed. | 640 | 870 | 28 | 27 HRC | 2 % IACS |
Cold drawn | Choose for small-diameter bar needing tight tolerance and higher yield strength; toughness and formability are reduced. | 780 | 950 | 18 | 31 HRC | 2 % IACS |
What is S32520 FORG+SA?
S32520 FORG+SA is S32520 heat treated to FORG+SA — for flanges, valve bodies and heavy fittings; requires post-forge anneal to restore phase balance and dissolve sigma. S32520 FORG+SA has a yield strength of 600 MPa (87 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 27% and the elastic modulus is 200 GPa (29 Msi). S32520 FORG+SA 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; FORG+SA is available on request or by drawing note.
Advantages
- Good corrosion resistance — 84/100, better than 91% of stainless steel grades
- High strength — 600 MPa (87 ksi), better than 86% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
S32520 FORG+SA properties
Typical room-temperature values for S32520 FORG+SA; 22 are specific to this condition. Other listed values are S32520 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S32520 FORG+SA 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
S32520 FORG+SA has a yield strength of 600 MPa (87 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 27% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S32520 FORG+SA is rated for continuous service to 300°C (572 °F). It conducts heat at 17 W/m·K (9.82 BTU/hr·ft·°F), better than 71% of stainless steel grades. Thermal expansion is 12.8 µm/m·K (7.11 µin/in·°F).
Electrical3
S32520 FORG+SA conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (84/100), better than 91% of stainless steel grades.
Sustainability4
Producing a kilogram of S32520 FORG+SA takes about 65 MJ of energy and emits 4.8 kg of CO₂ — more than 79% of stainless steel grades. Typical recycled content is 60%.
Manufacturability6
S32520 FORG+SA's machinability is poor (27/100, worse than 83% of stainless steel grades); weldability very good (70/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S32520 FORG+SA
Is S32520 easy to machine?
Machine like 2507: rigid setups, 20–30 % lower speeds than 316, positive-rake coated carbide, heavy constant feed and flood coolant to avoid work-hardened skins and dwell.
Can S32520 be welded?
GTAW/GMAW/SMAW with over-alloyed 25.10.4.L (Cu-bearing) filler, Ar+2 %N2 backing, interpass ≤150 °C and 0.5–2.5 kJ/mm heat input; no preheat, no PWHT unless a full solution anneal + quench is possible.
Can S32520 be formed, bent or molded?
Cold forms with roughly twice the force and springback of austenitics — use generous radii and over-bend; hot work 1000–1150 °C followed by mandatory solution anneal and water quench.
What surface finishes work on S32520?
Pickle and passivate (or electropolish) after welding to remove heat tint; grinding must not smear the surface — bead-blast plus pickling paste gives the most reliable corrosion performance. Not anodizable.
S32520 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 |
|---|---|---|
| C | ≤ 0.03 | 0.02 |
| Si | ≤ 0.8 | 0.4 |
| Mn | ≤ 1.5 | 0.8 |
| P | ≤ 0.04 | — |
| Smax; 0.005 typical | ≤ 0.02 | — |
| Cr | 24 – 26 | 25 |
| Ni | 5.5 – 8 | 6.5 |
| Mo | 3 – 5 | 3.6 |
| Cucopper addition improves sulfuric acid resistance | 0.5 – 3 | 1.5 |
| N | 0.2 – 0.35 | 0.25 |
| Fe | balance | — |
S32520 FORG+SA — frequently asked
What is S32520 FORG+SA used for?
S32520 FORG+SA is typically used for desalination equipment, chemical processing and flue gas desulfurization. In short: copper-bearing super duplex; sulfuric acid resistant; 2507-class chloride performance.
What is the yield strength of S32520 FORG+SA?
S32520 FORG+SA has a typical yield strength of 600 MPa (87 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 86% of stainless steel grades. Strength varies by condition: see the 6 listed tempers.
Is S32520 FORG+SA easy to machine?
Not especially — machinability is rated poor (27/100, worse than 83% of stainless steel grades). Machine like 2507: rigid setups, 20–30 % lower speeds than 316, positive-rake coated carbide, heavy constant feed and flood coolant to avoid work-hardened skins and dwell.
Can S32520 FORG+SA be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/SMAW with over-alloyed 25.10.4.L (Cu-bearing) filler, Ar+2 %N2 backing, interpass ≤150 °C and 0.5–2.5 kJ/mm heat input; no preheat, no PWHT unless a full solution anneal + quench is possible.
What surface finishes work on S32520 FORG+SA?
Pickle and passivate (or electropolish) after welding to remove heat tint; grinding must not smear the surface — bead-blast plus pickling paste gives the most reliable corrosion performance. Not anodizable.
Can S32520 FORG+SA be formed, bent or molded?
Cold forms with roughly twice the force and springback of austenitics — use generous radii and over-bend; hot work 1000–1150 °C followed by mandatory solution anneal and water quench.
What is the maximum service temperature of S32520 FORG+SA?
S32520 FORG+SA 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 S32520-SA and S32520-CD?
SA is the default condition — default condition for plate, bar, pipe and fittings — balanced 50/50 austenite/ferrite with no intermetallics, best corrosion and toughness. CD: choose for small-diameter bar needing tight tolerance and higher yield strength; toughness and formability are reduced. Yield strength is 620 MPa in SA versus 780 MPa in CD.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A479/A479M and A276 — Stainless Steel Bars and Shapes — ASTM International (2022)
- ASTM A790/A789 — Ferritic/Austenitic Stainless Steel Pipe and Tube — ASTM International (2022)
- EN 10088-1/-2 — Stainless steels, grade 1.4507 (X2CrNiMoCuN25-6-3) — CEN (2014)
- UR 52N+ (S32520/1.4507) super duplex stainless steel datasheet — Industeel / ArcelorMittal (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASTM A923 — Detecting Detrimental Intermetallic Phase in Duplex Stainless Steels — ASTM International (2022)
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.