USA SAE A 268/A 268M (2010), A 268 S44627 Specialsteel 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 | A 268 S44627 | Ferrite | SAE | USA | Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service | 
| C | Mn | Si | P | S | Cr | Ni | Mo | N | Nb | Cu | 
|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.01 | ≤0.40 | ≤0.40 | ≤0.02 | ≤0.02 | 25.00 -27.00 | ≤0.50 | 0.75 -1.50 | ≤0.015 | 0.05 -0.20 | ≤0.20 | 
| 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) | 
|---|---|---|---|---|---|---|
| 263 (≥) | 914 (≥) | 44 | 32 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 323 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 34 | - | - | 0.34 | - | |||
| 482 | 864 | - | 32.3 | 313 | - | ||
| 159 | - | 14 | 33.2 | 243 | 213 | 
Heat treated : 1175°C - 1842°C
| A 268/A 268M (2010) | Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service | A-268-A-268M-(2010).pdf | 
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