Stainless Steel S34565-SA (Solution annealed)
Heat-treated state · default condition
UNS S34565 · ASTM F49 · EN 1.4565
Standard supply condition for plate, sheet, bar and tube where maximum corrosion resistance and ductility are required.
Values for the SA condition
Other S34565 tempers and conditions
S34565 is listed in 4 conditions; see the grade overview at S34565.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Forged and solution annealed | Choose for flanges, valve bodies and fittings matching S34565 piping. | 450 | 830 | 40 | 215 HB | 1.9 % IACS |
SADefaultThis page Solution annealed | Standard supply condition for plate, sheet, bar and tube where maximum corrosion resistance and ductility are required. | 470 | 850 | 45 | 220 HB | — |
Cold drawn | Choose for shafts, fasteners and pump/valve stems needing higher yield strength and tight tolerance. | 700 | 950 | 25 | 28 HRC | 1.9 % IACS |
Cold worked | Choose for springs, clamps and high-strength thin strip where maximum strength beats formability. | 900 | 1,100 | 12 | 33 HRC | 1.9 % IACS |
What is S34565-SA?
S34565-SA is S34565 heat treated to SA — standard supply condition for plate, sheet, bar and tube where maximum corrosion resistance and ductility are required. S34565-SA has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 74% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 190 GPa (27.6 Msi). S34565-SA has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Advantages
- Good corrosion resistance — 88/100, better than 97% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
Limitations
- Difficult to machine — 20/100, worse than 98% of stainless steel grades
- Poor heat conductor — 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades
- High embodied carbon — 5.8 kg CO₂/kg, worse than 86% of stainless steel grades
- Low electrical conductivity — 1.9 % IACS, worse than 84% of stainless steel grades
S34565-SA properties
Typical room-temperature values for S34565-SA; 13 are specific to this condition. Other listed values are S34565 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S34565-SA has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Mechanical14
S34565-SA has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 74% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal6
S34565-SA is rated for continuous service to 425°C (797 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades. Thermal expansion is 14.5 µm/m·K (8.06 µin/in·°F).
Electrical3
S34565-SA conducts electricity at 1.9 % IACS, worse than 84% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 97% of stainless steel grades.
Sustainability4
Producing a kilogram of S34565-SA takes about 78 MJ of energy and emits 5.8 kg of CO₂ — more than 87% of stainless steel grades. Typical recycled content is 45%.
Manufacturability7
S34565-SA's machinability is poor (20/100, worse than 98% 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 S34565-SA
Is S34565 easy to machine?
Very gummy and strongly work hardening — use rigid setups, positive-rake carbide, 30–60 % of 304 speeds, heavy feed, flood coolant and avoid dwelling to prevent glazing.
Can S34565 be welded?
Readily GTAW/GMAW/SMAW welded with overalloyed Ni-base filler (ERNiCrMo-3/-4 or matching 4565 wire); low heat input, no preheat, interpass <150 °C, no post-weld heat treatment normally required.
Can S34565 be formed, bent or molded?
Cold formable but needs roughly twice the press force of 316L and generous bend radii; hot work 1150–900 °C followed by full solution anneal and quench.
What surface finishes work on S34565?
Pickle/passivate per ASTM A967 or electropolish after welding to restore the passive film; not anodizable, and mechanical polishing to a bright finish is straightforward.
S34565 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 | ≤ 1 | 0.4 |
| Mn | 5 – 7 | 6 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.01 | 0 |
| Cr | 23 – 25 | 24 |
| Ni | 16 – 18 | 17 |
| Mo | 4 – 5 | 4.5 |
| Nhigh-nitrogen alloying | 0.4 – 0.6 | 0.5 |
| Nb | ≤ 0.1 | 0.05 |
| Fe | balance | — |
S34565-SA — frequently asked
What is S34565-SA used for?
S34565-SA is typically used for high-strength offshore fasteners, pump and propeller shafts, marine hardware and chemical processing components. In short: strongest superaustenitic stainless; pitting resistance beyond 317; poor machinability.
What is the yield strength of S34565-SA?
S34565-SA has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 74% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is S34565-SA easy to machine?
Not especially — machinability is rated poor (20/100, worse than 98% of stainless steel grades). Very gummy and strongly work hardening — use rigid setups, positive-rake carbide, 30–60 % of 304 speeds, heavy feed, flood coolant and avoid dwelling to prevent glazing.
Can S34565-SA be welded?
Yes — weldability is rated very good (70/100). Readily GTAW/GMAW/SMAW welded with overalloyed Ni-base filler (ERNiCrMo-3/-4 or matching 4565 wire); low heat input, no preheat, interpass <150 °C, no post-weld heat treatment normally required.
What surface finishes work on S34565-SA?
Pickle/passivate per ASTM A967 or electropolish after welding to restore the passive film; not anodizable, and mechanical polishing to a bright finish is straightforward.
Can S34565-SA be formed, bent or molded?
Cold formable but needs roughly twice the press force of 316L and generous bend radii; hot work 1150–900 °C followed by full solution anneal and quench.
What is the maximum service temperature of S34565-SA?
S34565-SA is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S34565-SA and S34565-CW?
SA is the default condition — standard supply condition for plate, sheet, bar and tube where maximum corrosion resistance and ductility are required. CW: choose for springs, clamps and high-strength thin strip where maximum strength beats formability. Yield strength is 470 MPa in SA versus 900 MPa in CW.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A479/A479M — Stainless Steel Bars and Shapes for Boilers and Pressure Vessels — ASTM International (2021)
- ASTM A182/A182M — Forged or Rolled Alloy and Stainless Steel Pipe Flanges and Fittings (Grade F49) — ASTM International (2022)
- EN 10088-1/-2 — Stainless steels, grade X2CrNiMnMoN25-18-6-5 (1.4565) — CEN (2014)
- Superaustenitic grade 4565 / Alloy 24 data sheet — Outokumpu (2022)
- High-nitrogen austenitic stainless plate data (UR 4565 / Alloy 24) — Industeel (ArcelorMittal) (2021)
- 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.