STD12
Korea KS STD12 Carbide for cutting tools and STD12 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Type | Steel Grade | Standard | Country | Application |
|---|---|---|---|---|---|
| Steel Grades | Tool Steel And Hard Alloy | STD12 | KS | Korea | Carbide for cutting tools |
| STS93 | |||||
| STS94 | |||||
| STS94 | |||||
| STS95 | |||||
| STS95 | |||||
| STD1 | |||||
| STD1 | |||||
| STD11 | |||||
| STD11 | |||||
| STD12 |
Chemical composition(mass fraction)(wt.%) of the STD12
| C(％) | Si(％) | Mn(％) | Cr(％) | Ni(％) | Mo(％) | V(%) |
|---|---|---|---|---|---|---|
| 0.95-1.05 | ≤0.40 | 0.60-0.90 | 4.50-5.50 | ＜0.50 | 0.80-1.20 | 0.20-0.50 |
Mechanical Properties of steel grade STD12
| 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) |
|---|---|---|---|---|---|---|
| 477 (≥) | 275 (≥) | 33 | 32 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 412 |
Physical Properties of steel grade STD12
| 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 |
|---|---|---|---|---|---|---|---|
| 13 | – | – | 0.44 | – | |||
| 711 | 676 | – | 41.3 | 132 | – | ||
| 589 | – | 14 | 44.2 | 424 | 133 |
Heat Treatment of steel grade STD12
Heat treated : 1877°C – 1681°C
Technological Curves of steel grade STD12
No Curve