39NiCrMo3是什么材料, 急!!

请问各位老师39NiCrMo3到底是什么材料?有没有国产的性能相似材料可以替代?

它應該是一種塑料模具鋼.
相當 英國的 BP39.

这是意大利的一种合金钢。现在它所有的标准都被ＤＩＮ　ＥＮ　标准替代了，可参考下列信息。
1）UNI 8787 Hot rolled finished products of steel for quenching and tempering - Plates sheets, strips, coils and wide flats for mechanical engineering purposes - Qualities, requirements and tests. Withdrawn and replaced by EN 10083-1:1993
2）UNI 7874 Forged unalloyed or special-alloyed, quenched and tempered or normalized steel flat products。Replaced by EN 10083-1.
3）UNI 6403 Low alloy steel; Samless steel tubes for use in road vehicles and other specific purposes.Withdrawn standard. This grade is a special alloy steel intended to be hardened and tempered, manufactured as a killed steel.

39NiCrMo3意大利的一种合金钢，国内与之成分相近的是40NiCrMoA，只是40NiCrMoA的Ni含量是1.25-1.65%，而39NiCrMo3的Ni含量是0.70-1.00%。