40CrMnNiMo8-6-4

40CrMnNiMo8-6-4   C 0.40 Mn 1.50 Cr 1.90 Mo 0.20 S 0.05钢材性能回火塑料模具钢，硬度280至325 HB。比1.2311加工性能更好标准AISI P20+S物理性质热膨胀系数°C            20-100     20-200     20-30010-6 m/(m · K)退火         12.5       13.4       13.910-6 m/(m · K)淬火和回火   12.3       13.0       13.7热传导率°C         100     150    200    250    300W/(m·K)退火       40.2     40.9    40.3   40.0    39.0W/(m·K)淬火和回火 39.8     40.4    40.4   39.9    39.0应用领域压力铸造模具框架热处理软退火°C        冷却                        硬度HB710-740         熔炉                         ≤230硬化°C          淬火                       淬火后硬度HRC840-870       油或热水浴，180-220°C             51回火°C     100    200     300    400   500    600    700HRC        51     50      48     46    42     36     28