Patent ID: 7682417

Claim:
A cold work steel article, wherein the article comprises a material having a composition, in % by weight, of: Carbon from more than about 0.6 to less than about 1.0 Silicon from more than about 0.3 to less than about 0.85 Manganese from more than about 0.2 to less than about 1.5 Phosphorus from 0 to about 0.03 Sulfur from 0 to less than about 0.5 Chromium from more than about 4.0 to less than about 6.2 Molybdenum from more than about 1.9 to less than about 3.8 Nickel from 0 to less than about 0.9 Vanadium from more than about 1.0 to less than about 2.9 Tungsten from more than about 1.8 to less than about 3.4 Copper from 0 to less than about 0.7 Cobalt from more than about 3.8 to less than about 5.8 Aluminum from 0 to less than about 0.065 Nitrogen from 0 to less than about 0.2 Oxygen from 0 to about 0.012 the balance being iron and accompanying and impurity elements due to smelting, the material produced by a powder metallurgical process.