STEEL FOR PLASTIC MOLDING DIE AND PLASTIC MOLDING DIE

摘要

PROBLEM TO BE SOLVED: To provide steel for a plastic molding die capable of suppressing waviness in polishing finishing while having corrosion resistance and thermal conductivity.;SOLUTION: The steel contains, by mass%, C: 0.09%-0.13%, Si: 0.10%-0.40%, Mn: 0.30%-0.80%, P: 0.030% or less, Cu: 0.80%-1.20%, Ni: 2.50%-3.50%, Cr: 2.0%-less than 3.0%, Mo: 0.10%-0.40%, V: 0.01%-0.10%, N: 0.0200% or less, O: 0.0100% or less, and Al: 0.50%-1.50% or less and the balance of Fe and inevitable impurities, and the steel satisfies 3.4≤10×C+Mn+Cr≤4.8.;COPYRIGHT: (C)2011,JPO&INPIT