High impact and thermal shock resistant die steel, dies, dies blocks and method of manufacture thereof

摘要

A steel and tool made therefrom which in a tempered condition of 388 BHN or softer has high strength, high wear resistance together with excellent toughness in the range of 15% elongation and 35 ft-lbs. charpy and having the following composition: - C .33-.39 - Mn .50-.70 - P .025 max. - S .025 max. - Si .40-.60 - Ni 1.05-1.35 - Cr 1.33-1.68 - Mo .40-.60 - Cu .60-.90 - Al .010-.030 - Fe balance -