Patent ID: 8298353
Filing Date: 2012-10-30
Classification: C21D,C22C

Abstract:
1. A hardened steel alloy having enhanced toughness, weldability strength and workability, said steel alloy comprising in weight percent about: 0.030 to 0.055 carbon (C); 3.50 to 5.0 copper (Cu); 6.0 to 7.5 nickel (Ni); 1.6 to 2.0 chromium (Cr); 0.2 to 0.6 molybdenum (Mo); 0.05 to 0.20 vanadium (V), and the balance iron (Fe) characterized by a yield strength exceeding about 140 Ksi, and an essentially martensitic microstructure dispersed with BCC copper hardening precipitates, M