Stainless Steel S34565-F49
Heat-treated state
UNS S34565 · ASTM F49 · EN 1.4565
F49 = forged and solution annealed
Choose for flanges, valve bodies and fittings matching S34565 piping.
Values for the F49 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 |
|---|---|---|---|---|---|---|
F49This page Forged and solution annealed | Choose for flanges, valve bodies and fittings matching S34565 piping. | 450 | 830 | 40 | 215 HB | 1.9 % IACS |
SADefault 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-F49?
S34565-F49 is S34565 heat treated to F49 — choose for flanges, valve bodies and fittings matching S34565 piping. S34565-F49 has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 70% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 190 GPa (27.6 Msi). S34565-F49 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). SA is the default condition FabDigit quotes; F49 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 88/100, better than 97% 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-F49 properties
Typical room-temperature values for S34565-F49; 22 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-F49 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-F49 has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 70% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal6
S34565-F49 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-F49 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-F49 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-F49's machinability is poor (20/100, worse than 98% of stainless steel grades); weldability very good (70/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S34565-F49
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-F49 — frequently asked
What is S34565-F49 used for?
S34565-F49 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-F49?
S34565-F49 has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 70% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is S34565-F49 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-F49 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-F49?
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-F49 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-F49?
S34565-F49 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.