USA SAE A 581/A 581M (2009), A 581 S18200 Specialsteel Free-Machining Stainless Steel Wire and Wire Rods and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application | 
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | A 581 S18200 | Ferrite | SAE | USA | Free-Machining Stainless Steel Wire and Wire Rods | 
| C | Mn | Si | P | S | Cr | Ni | Mo | 
|---|---|---|---|---|---|---|---|
| ≤0.08 | ≤2.50 | ≤1.00 | ≤0.04 | 0.15 - ≥ | 17.50 -19.50 | ≤ ≥ | 1.50 -2.50 | 
| 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) | 
|---|---|---|---|---|---|---|
| 793 (≥) | 717 (≥) | 43 | 42 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 322 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 11 | - | - | 0.44 | - | |||
| 234 | 746 | - | 42.3 | 323 | - | ||
| 242 | - | 23 | 21.2 | 232 | 222 | 
Heat treated : 1123°C - 1162°C
| A 581/A 581M (2009) | Free-Machining Stainless Steel Wire and Wire Rods | A-581-A-581M-(2009).pdf | 
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