Patent ID: 8940110
Filing Date: 2015-01-27
Classification: B22F,C22C,F01L,Y10T

Abstract:
1. An iron-based alloy having a copper precipitation strengthening mechanism comprising, in weight percentage: carbon from about 1.6 to 3.0%; silicon from about 0.8 to 2.1%; manganese up to 1.0%; chromium from about 12.0 to 15.0%; molybdenum from about 2.0 to 4.0%; nickel from about 0.2 to 0.8%; copper from about 0.4 to 4.0%; phosphorus from about 0.005 to about 0.015%; boron from about 0.15 to 0.5%; and balance iron and incidental impurities; wherein the alloy has a microstructure comprising tempered martensite.