Stainless Steel 1.4805 Aged
Heat-treated state
EN 1.4805
Aged = 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.
Values for the Aged 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 |
|---|---|---|---|---|---|---|
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 | — |
AgedThis page 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 Aged?
1.4805 Aged is 1.4805 heat treated to Aged — represents the embrittled condition after exposure in service; use these values for design of components that must survive thermal cycling. 1.4805 Aged has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 495 MPa (71.8 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 185 GPa (26.8 Msi). 1.4805 Aged 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; Aged 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
- Limited ductility — 8%, worse than 99% of stainless steel grades
- Difficult to machine — 18/100, worse than 99% of stainless steel grades
- Limited formability — 5/100, worse than 99% of stainless steel grades
- Hard to polish — 40/100, worse than 99% 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
1.4805 Aged properties
Typical room-temperature values for 1.4805 Aged; 10 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 Aged 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 Aged has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 495 MPa (71.8 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 185 GPa (26.8 Msi).
Thermal6
1.4805 Aged 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 Aged conducts electricity at 1.8 % IACS, worse than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 58% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4805 Aged 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 Aged's machinability is poor (18/100, worse than 99% of stainless steel grades); weldability fair (45/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4805 Aged
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 Aged — frequently asked
What is 1.4805 Aged used for?
1.4805 Aged 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 Aged?
1.4805 Aged has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 495 MPa (71.8 ksi) — weaker than 77% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4805 Aged easy to machine?
Not especially — machinability is rated poor (18/100, worse than 99% 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 Aged be welded?
With care — weldability is rated fair (45/100). 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 Aged?
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 Aged 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 Aged?
1.4805 Aged 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.