Chemical Composition and Mechal Properanicty
| % | C | Si | Mn | Cr | Ni | Al | Ti | Cu | P | S | Fe |
| Min | - | - | - | 19.0 | 30.0 | 0.15 | 0.15 | - | - | - | 0.15 |
| Max | 0.1 | 1.0 | 1.5 | 23.0 | 35.0 | 0.6 | 0.6 | 0.75 | 0.03 | 0.015 | remain |
| Temperature 0/℃ | 25 | 425 | 540 | 760 |
| Hardness HB | 138~198 | 120~170 | 119~161 | 66~91 |
| Density g/cm³ | 7.97 |
| Coefficient of expansion/(10-6/k)100~900℃ | 14.12~18.44 |
| Specific heat capacity℃)/kg/(kg.k)℃ | 500 |
| Resistivity℃)/（Ω.mm2/m)100~900℃ | 1.01~1.28 |
| Thermal conductivity/w/(m.k)100~900℃ | 14.23~32.23 |