Patent ID: 6087013
Filing Date: 2000-07-11
Classification: B32B,C22C,F41H,Y10S

Abstract:
A high-strength, high toughness composite material comprising:an air hardened steel element having a normalization temperature of approximately 1650.degree. F. and a composition consisting essentially of: 0.20-0.30 wt. % Carbon, 0.80-1.20 wt. % Manganese, 3.25-4.00 wt. % Nickel, 1.25-2.00 wt. % Chromium, 0.25-0.50 wt. % Molybdenum, 0.20-0.50 wt. % Silicon, 0.04 max. wt. % Sulfur, 0.04 max. wt. % Phosphorous, and the balance iron;  said composite material further comprising a borosilicate glass coating fused to a surface of said steel element over at least a portion of said steel element, whereby said portion of said composite material has a V50 value which is greater than a V50 value of the steel element alone.