HOT WORKING DIE STEEL EXCELLING IN MOLTEN CORROSION RESISTANCE AND STRENGTH AT ELEVATED TEMPERATURE AND MEMBER FOR HIGH TEMPERATURE USE FORMED OF THE HOT WORKING DIE STEEL

摘要

A hot working die steel contains 0.05 - 0.25% C, 0.30% or less Si, 0.30% or less Mn, 1.0% or less Ni, 5.0 - 13.0% Cr, 2.0% or less Mo, 1.0 - 8.0% W, 1.0 - 10.0% Co, 0.003 - 0.020% B, 0.005 - 0.050% N, and the balance consisting essentially of Fe and unavoidable impurities. If desired, the hot working die steel may further contain 0.01 - 1.0% V and 0.01 - 1.0% of at least one kind selected from Nb and Ta.