USA AMS SA-268/SA-268M, SA-268 S44400 Specialsteel Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application |
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | SA-268 S44400 | Ferrite | AMS | USA | Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |
| C | Mn | Si | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| ≤0.025 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 17.50 -19.50 | ≤1.00 | 1.75 -2.50 | ≤0.035 |
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 745 (≥) | 972 (≥) | 13 | 21 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 241 |
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson’s coefficient, ν |
|---|---|---|---|---|---|---|---|
| 33 | - | - | 0.21 | - | |||
| 549 | 768 | - | 11.3 | 233 | - | ||
| 513 | - | 21 | 22.2 | 314 | 113 |
Heat treated : 1929°C - 1911°C
| Grade | Standard | Country | Application |
|---|---|---|---|
| 1.4449 | |||
| 1.4446 | |||
| 1.4448 | |||
| 1.4440 | |||
| 1.4440 | |||
| 444 | |||
| S44400 | |||
| 444 | |||
| S44450 | |||
| TP44400 | |||
| S44400 | |||
| TP44400 | |||
| S44400 | |||
| S44400 | |||
| S44400 | |||
| AMS 6444G | |||
| SUS444 | |||
| SUS444 | |||
| SUS444 | |||
| SUS444TP |
| SA-268/SA-268M | Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service | SA-268-SA-268M.pdf |
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