Stainless Steel 1.4805-SA
Heat-treated state
EN 1.4805
SA = solution annealed ~1150 °C, rapid cooled
Optional treatment to dissolve part of the carbide network and restore ductility/machinability before heavy machining or welding.
Values for the SA condition
Other 1.4805 tempers and conditions
1.4805 is listed in 3 conditions; see the grade overview at 1.4805.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SAThis page Solution annealed ~1150 °C, rapid cooled | Optional treatment to dissolve part of the carbide network and restore ductility/machinability before heavy machining or welding. | 240 | 460 | 18 | 150 HB | 1.8 % IACS |
FDefault As fabricated | Standard supply condition for furnace hardware; best combination of room-temperature ductility and creep strength. | 260 | 470 | 13 | 165 HB | — |
24 h at 760 °C, air cooled | Represents the embrittled condition after exposure in service; use these values for design of components that must survive thermal cycling. | 275 | 495 | 8 | 190 HB | — |
What is 1.4805-SA?
1.4805-SA is 1.4805 heat treated to SA — optional treatment to dissolve part of the carbide network and restore ductility/machinability before heavy machining or welding. 1.4805-SA has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 185 GPa (26.8 Msi). 1.4805-SA has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,300°C (2,372 °F). F is the default condition FabDigit quotes; SA is available on request or by drawing note.
Advantages
- High service temperature — 1,090°C (1,994 °F), better than 93% of stainless steel grades
Limitations
- Hard to polish — 40/100, worse than 99% of stainless steel grades
- Limited formability — 8/100, worse than 97% of stainless steel grades
- Low strength — 240 MPa (34.8 ksi), worse than 96% of stainless steel grades
- Poor heat conductor — 12.5 W/m·K (7.22 BTU/hr·ft·°F), worse than 90% of stainless steel grades
- Low electrical conductivity — 1.8 % IACS, worse than 87% of stainless steel grades
1.4805-SA properties
Typical room-temperature values for 1.4805-SA; 22 are specific to this condition. Other listed values are 1.4805 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4805-SA has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,300°C (2,372 °F).
Mechanical12
1.4805-SA has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 185 GPa (26.8 Msi).
Thermal6
1.4805-SA is rated for continuous service to 1,090°C (1,994 °F). It conducts heat at 12.5 W/m·K (7.22 BTU/hr·ft·°F), worse than 90% of stainless steel grades. Thermal expansion is 15 µm/m·K (8.33 µin/in·°F).
Electrical3
1.4805-SA conducts electricity at 1.8 % IACS, worse than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 56% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4805-SA takes about 68 MJ of energy and emits 5.2 kg of CO₂ — more than 80% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.4805-SA's machinability is poor (27/100, worse than 83% of stainless steel grades); weldability fair (50/100); formability not recommended (8/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4805-SA
Is 1.4805 easy to machine?
Machine with rigid setups, sharp carbide (or ceramic for finish) tooling, low speed and heavy positive feed to cut under the work-hardened skin; interrupted cuts on the carbide network cause rapid edge chipping.
Can 1.4805 be welded?
Weld with matching HN or 25Cr-20Ni (ER310/E310-15) filler, preheat 150–260 °C on heavy sections, low heat input and stress-relieve or slow-cool; aged/service-exposed material should be re-solution-annealed before repair welding.
Can 1.4805 be formed, bent or molded?
Sand, investment or centrifugal casting only — no cold or hot forming; provide generous fillets, uniform sections and feeders because solidification shrinkage and hot tearing risk are high.
What surface finishes work on 1.4805?
Shot blast and pickle/passivate to remove casting scale; not anodizable — for extreme carburising service consider aluminising or ceramic wash coating, and avoid heavy polishing since carbides pull out.
1.4805 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 |
|---|---|---|
| Chigh C gives carbide strengthening / creep strength | 0.2 – 0.5 | 0.35 |
| SiA297 HN allows Si ≤ 2.00; EN designation implies deliberate Si addition for scaling resistance | 1 – 2.5 | 1.6 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.04 | — |
| S | ≤ 0.04 | — |
| Cr | 19 – 23 | 21 |
| Ni | 23 – 27 | 25 |
| Moresidual only | ≤ 0.5 | — |
| Fe | balance | — |
1.4805-SA — frequently asked
What is 1.4805-SA used for?
1.4805-SA is typically used for furnace fixtures, heat-treatment baskets and combustion equipment. In short: 1090 °C service casting; high-silicon scaling resistance; hardest machining in group.
What is the yield strength of 1.4805-SA?
1.4805-SA has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 96% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4805-SA easy to machine?
Not especially — machinability is rated poor (27/100, worse than 83% of stainless steel grades). Machine with rigid setups, sharp carbide (or ceramic for finish) tooling, low speed and heavy positive feed to cut under the work-hardened skin; interrupted cuts on the carbide network cause rapid edge chipping.
Can 1.4805-SA be welded?
With care — weldability is rated fair (50/100). Weld with matching HN or 25Cr-20Ni (ER310/E310-15) filler, preheat 150–260 °C on heavy sections, low heat input and stress-relieve or slow-cool; aged/service-exposed material should be re-solution-annealed before repair welding.
What surface finishes work on 1.4805-SA?
Shot blast and pickle/passivate to remove casting scale; not anodizable — for extreme carburising service consider aluminising or ceramic wash coating, and avoid heavy polishing since carbides pull out.
Can 1.4805-SA be formed, bent or molded?
Sand, investment or centrifugal casting only — no cold or hot forming; provide generous fillets, uniform sections and feeders because solidification shrinkage and hot tearing risk are high.
What is the maximum service temperature of 1.4805-SA?
1.4805-SA is rated for continuous use to about 1,090°C (1,994 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4805-F and 1.4805-SA?
F is the default condition — standard supply condition for furnace hardware; best combination of room-temperature ductility and creep strength. SA: optional treatment to dissolve part of the carbide network and restore ductility/machinability before heavy machining or welding. Yield strength is 260 MPa in F versus 240 MPa in SA.
Sources
- ASTM A297/A297M — Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application (grade HN) — ASTM International (2020)
- EN 10295 — Heat resistant steel castings — CEN (2002)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys (Heat-Resistant Castings) — ASM International (1990)
- Steel Castings Handbook, Supplement 9 — High Alloy Data Sheets, Heat Series — Steel Founders' Society of America (2004)
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.