USA AMS SA-268/SA-268M, SA-268 S44800 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 S44800 | 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 | Cu |
---|---|---|---|---|---|---|---|---|---|
≤0.01 | ≤0.30 | ≤0.20 | ≤0.025 | ≤0.02 | 28.00 -30.00 | 2.00 -2.50 | 3.50 -4.20 | ≤0.02 | ≤0.15 |
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) |
---|---|---|---|---|---|---|
471 (≥) | 962 (≥) | 24 | 32 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 311 |
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 |
---|---|---|---|---|---|---|---|
22 | - | - | 0.34 | - | |||
287 | 919 | - | 32.3 | 214 | - | ||
544 | - | 24 | 14.2 | 422 | 133 |
Heat treated : 1988°C - 1716°C
Grade | Standard | Country | Application |
---|---|---|---|
S44800 | |||
S44800 | |||
S44800 | |||
S44800 | |||
29-4-2(S44800) |
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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