Stainless Steel 1.4408-SA (Solution annealed)
Heat-treated state · default condition
EN 1.4408 · UNS J92900 · ASTM CF8M
Standard supply condition for all pressure- and corrosion-service castings; carbides dissolved for maximum corrosion resistance and ductility.
Values for the SA condition
Other 1.4408 tempers and conditions
1.4408 is listed in 5 conditions; see the grade overview at 1.4408.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Sand cast, solution annealed | Standard route for large pump casings and valve bodies; coarser grain, slightly lower strength than investment cast. | 250 | 515 | 42 | 155 HB | 2.3 % IACS |
SADefaultThis page Solution annealed | Standard supply condition for all pressure- and corrosion-service castings; carbides dissolved for maximum corrosion resistance and ductility. | 260 | 530 | 45 | 160 HB | 2.3 % IACS |
Spheroidize annealed | Only for non-critical, non-corrosive structural castings; interdendritic carbides lower ductility and corrosion resistance. | 270 | 520 | 30 | 9 HRC | 2.3 % IACS |
Hot isostatically pressed then solution annealed | Used when microporosity must be eliminated (high-pressure, fatigue-loaded or radiographed castings). | 275 | 560 | 52 | 160 HB | 2.3 % IACS |
Investment cast, solution annealed | Choose for small, thin-walled valve/pump parts needing near-net shape and a finer, slightly stronger structure. | 280 | 550 | 45 | 165 HB | 2.3 % IACS |
What is 1.4408-SA?
1.4408-SA is 1.4408 heat treated to SA — standard supply condition for all pressure- and corrosion-service castings; carbides dissolved for maximum corrosion resistance and ductility. 1.4408-SA has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 193 GPa (28 Msi). 1.4408-SA has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Advantages
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
Limitations
- Low strength — 260 MPa (37.7 ksi), worse than 84% of stainless steel grades
1.4408-SA properties
Typical room-temperature values for 1.4408-SA; 20 are specific to this condition. Other listed values are 1.4408 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4408-SA has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical15
1.4408-SA has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
1.4408-SA is rated for continuous service to 800°C (1,472 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
1.4408-SA conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 73% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4408-SA takes about 53 MJ of energy and emits 4.5 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 75%.
Manufacturability7
1.4408-SA's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (75/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4408-SA
Is 1.4408 easy to machine?
Machines like 316: gummy and work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed, 60–120 m/min and flood coolant; avoid dwelling and watch for hard casting skin/sand inclusions.
Can 1.4408 be welded?
Very good weldability with 316L/E316L-15 or ER316L filler (or 309L to carbon steel); the 5–20% δ-ferrite suppresses hot cracking, keep interpass low and re-solution-anneal repaired pressure castings where the code requires it.
Can 1.4408 be formed, bent or molded?
Supplied as sand or investment castings; excellent fluidity and low hot-tearing tendency, but allow ~2.0–2.5% solidification shrinkage and generous risering on heavy sections, plus 1050–1120 °C water quench after casting.
What surface finishes work on 1.4408?
Passivate per ASTM A967 or electropolish after machining; shot-blast/pickle to remove casting skin; can be mechanically polished, though porosity limits mirror finishes — no anodizing.
1.4408 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 |
|---|---|---|
| CASTM CF8M allows ≤0.08 | ≤ 0.07 | 0.05 |
| Si | ≤ 1.5 | 1 |
| Mn | ≤ 1.5 | 1 |
| P | ≤ 0.04 | — |
| S | ≤ 0.03 | — |
| CrASTM CF8M: 18.0–21.0 | 18 – 20 | 19 |
| Ni | 9 – 12 | 10.5 |
| MoASTM CF8M: 2.0–3.0 | 2 – 2.5 | 2.3 |
| NEN 10213 limit | ≤ 0.2 | — |
| Fe | balance | — |
1.4408-SA — frequently asked
What is 1.4408-SA used for?
1.4408-SA is typically used for marine pump and valve castings, chemical process equipment and food and pharma equipment. In short: cast 316 for chlorides; most widely stocked Mo cast grade; good weldability, moderate machinability.
What is the yield strength of 1.4408-SA?
1.4408-SA has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 84% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4408-SA easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Machines like 316: gummy and work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed, 60–120 m/min and flood coolant; avoid dwelling and watch for hard casting skin/sand inclusions.
Can 1.4408-SA be welded?
Yes — weldability is rated very good (75/100). Very good weldability with 316L/E316L-15 or ER316L filler (or 309L to carbon steel); the 5–20% δ-ferrite suppresses hot cracking, keep interpass low and re-solution-anneal repaired pressure castings where the code requires it.
What surface finishes work on 1.4408-SA?
Passivate per ASTM A967 or electropolish after machining; shot-blast/pickle to remove casting skin; can be mechanically polished, though porosity limits mirror finishes — no anodizing.
Can 1.4408-SA be formed, bent or molded?
Supplied as sand or investment castings; excellent fluidity and low hot-tearing tendency, but allow ~2.0–2.5% solidification shrinkage and generous risering on heavy sections, plus 1050–1120 °C water quench after casting.
What is the maximum service temperature of 1.4408-SA?
1.4408-SA is rated for continuous use to about 800°C (1,472 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4408-SA and 1.4408 IC-SA?
SA is the default condition — standard supply condition for all pressure- and corrosion-service castings; carbides dissolved for maximum corrosion resistance and ductility. IC-SA: choose for small, thin-walled valve/pump parts needing near-net shape and a finer, slightly stronger structure. Yield strength is 260 MPa in SA versus 280 MPa in IC-SA.
Sources
- EN 10213 — Steel castings for pressure purposes (GX5CrNiMo19-11-2, 1.4408) — CEN (2016)
- EN 10283 — Corrosion resistant steel castings — CEN (2010)
- ASTM A351/A351M — Castings, austenitic, for pressure-containing parts (CF8M, J92900) — ASTM (2022)
- ASTM A743/A744 — Corrosion-resistant iron-chromium-nickel castings — ASTM (2021)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America (1995)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
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.