to Tool and die steels
to Properties of steels and cast irons
(submitted by the website administration)
| USA: AISI T15, UK: BT15, Sweden: USA T15, Germany: 1.3202, Japan: SKH10 | ||||
| Chemical composition: C=1.6%, Mn=0.3%, W=12%, Si=0.3%, Cr=4%, V=5%, Co=5% | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 8.19 *10³ | kg/m³ | 511.2 | lb/ft³ |
|---|---|---|---|---|
| Modulus of elasticity | 214 | GPa | 31000 | ksi |
| Thermal expansion (20 ºC) | 9.9*10-6 | ºCˉ¹ | 5.5*10-6 | in/(in* ºF) |
| Specific heat capacity | 461 | J/(kg*K) | 0.11 | BTU/(lb*ºF) |
| Thermal conductivity | 20.9 | W/(m*K) | 147 | BTU*in/(hr*ft²*ºF) |
| Annealing temperature | 870...890 | ºC | 1600...1630 | ºF |
| Quenching temperature | 1165-1235 | ºC | 2125-2250 | ºF |
| Tempering temperature | 540...650 | ºC | 1000...1200 | ºF |
| Hardness (annealed) | 56 | RC | 56 | RC |
| Hardness (hardened) | 68 | RC | 68 | RC |
| Quenching medium | Oil, air or salt | |||
| Hardening depth | High | |||
| Resistivity to distortion | Medium | |||
| Resistivity to cracking | Medium | |||
| Machinability | Medium (may be improved by addition of sulfur up to 0.22%) | |||
| Toughness | Low | |||
| Wear resistance | Very high | |||