牌号 | X55CrMnNiN20-8 |
1.4875 | |
对应标准 | NF EN 10090-1998
阀门用钢和合金 Valve steels and alloys for internal combustion engines |
归类 | 奥氏体不锈钢 |
密度 | 7.8 g/cm3 |
Designation | Reference heat treatment condition | Tensile strength at: N/mm2 ① | |||||||
Name | Number | 500°C | 550°C | 600°C | 650°C | 700°C | 750°C | 800°C | |
X55CrMnNiN20-8 | 1.4875 | +AT+P | 640 | 590 | 540 | 490 | 440 | 360 | 290 |
① The values given here are situated near the lower limit of the scatter range. |
Designation | Reference heat treatment condition | 0.2% proof strength at: N/mm2 ① | |||||||
Name | Number | 500°C | 550°C | 600°C | 650°C | 700°C | 750°C | 800°C | |
X55CrMnNiN20-8 | 1.4875 | +AT+P | 300 | 280 | 250 | 230 | 220 | 200 | 170 |
① The values given here are situated near the lower limit of the scatter range. |
Designation | Creep strength after 1000 h at: N/mm2 ① | ||||
Name | Number | 500°C | 650°C | 725°C | 800°C |
X55CrMnNiN20-8 | 1.4875 | - | 160 | 85 | 45 |
① Mean values of scatter range determined until now. |
Designation | Hot forming ℃ | Soft annealing ℃ | Quenching or solution heat treatment ℃ | Quenching agent | Tempering or artificial ageing ℃ | |
Name | Number | |||||
X55CrMnNiN20-8 | 1.4875 | 1100 to 950 | - | 1140 to 1180 | w | 760 to 815/ 4h to 8h a |
◎ a=air; o=oil; w=water |
静态弹性模量 | 20°C与各温度间热膨胀系数 | 热导率 | 比热容 | 磁性 | |||
20°C | 100°C | 300°C | 500°C | 700°C | 20°C | 20°C | 无 ① |
KN/mm2 | 10-6 K-1 | W/m.K | J/kg.K | ||||
205 | 15.5 | 17.5 | 18.5 | 18.8 | 14.5 | 500 |
① 奥氏体钢在时效条件下可能会有轻微的磁化。它们的磁化率可以随着冷成形时间的延长而提高。 |