Stainless Steel S34565
UNS S34565 · ASTM F49 · EN 1.4565
S34565 is a high-nitrogen, high-manganese superaustenitic stainless steel (also designated F49) whose high Cr-Ni-Mo-N content gives 470 MPa yield, 850 MPa tensile and 45 % elongation at about 220 HB in the solution-annealed condition, with pitting and crevice resistance beyond standard 316 and 317.
Reference datasheet — S34565 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the SA condition
S34565 tempers and conditions
S34565 is supplied in 4 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
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 |
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 |
Supply forms, finishes and certifications
Ways S34565 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
TUBE-A | Tube annealed | Supply form |
2B | Cold rolled, annealed, pickled and skin-passed sheet | Surface finish |
HRAP | Hot rolled, solution annealed and pickled plate | Surface finish |
What is S34565?
S34565 is a high-nitrogen, high-manganese superaustenitic stainless steel (also designated F49) whose high Cr-Ni-Mo-N content gives 470 MPa yield, 850 MPa tensile and 45 % elongation at about 220 HB in the solution-annealed condition, with pitting and crevice resistance beyond standard 316 and 317. Engineers select it where high strength and severe chloride or acid exposure occur together; it is stocked as plate, hot-rolled annealed pickled and 2B sheet, tube, bar and cold-drawn or cold-worked product. Machinability is poor (score 20) and service is capped near 425 °C. Where strength demand is lower, 6Mo austenitics such as S31254 are the nearest alternative. S34565 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). S34565 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).
What is S34565 used for?
- high-strength offshore fasteners
- pump and propeller shafts
- marine hardware
- chemical processing components
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 properties
Typical room-temperature values for S34565-SA; bars are the position among stainless steel grades.
Physical3
S34565 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 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 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 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 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'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. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. S34565 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S34565
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.
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 |
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.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel S34565 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- F49
- EN / DIN / Werkstoff-Nr.
- 1.4565
- Also called
- Alloy 24
How much does S34565 cost?
S34565 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
S34565 — frequently asked
What is S34565 used for?
S34565 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?
S34565 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 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 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?
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 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?
S34565 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.
How much does S34565 cost?
S34565 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.