Patent ID: 6200528
Filing Date: 2001-03-13
Classification: C21D,C22C

Abstract:
An alloy steel consisting essentially of by weight about 0.75 to 1.25% carbon, 0.3 to 1.35% manganese, 0.036 to 0.300% sulphur, less than 0.04% phosphorous, 0.1 to 0.7% silicon, 3.25 to 5% chromium, 5.25 to 12% molybdenum, less than 0.5% cobalt, 0.5 to 1.75% vanadium, 0.5 to 5% tungsten, 0.03 to 1.25% aluminum, 0.15 to 2.5 niobium, 0.25 to 2.5% zirconium, 0.3 to 4.75% tantalum, and 0.015 to 0.1% titanium, balance substantially iron.