AIR HARDENABLE SHOCK-RESISTANT STEEL ALLOYS, METHODS OF MAKING THE ALLOYS, AND ARTICLES INCLUDING THE ALLOYS

摘要

A tempered air hardenable steel alloy consisting of, in percent by weight: 0.18 to 0.26 carbon; 3.50 to 4.00 nickel; 1.60 to 2.00 chromium; 0 up to 0.50 molybdenum; 0.80 to 1.20 manganese; 0.25 to 0.45 silicon; 0 to less than 0.005 titanium; 0 to less than 0.020 phosphorus; 0 up to 0.005 boron; 0 up to 0.003 sulfur; iron; and incidental impurities; wherein the steel alloy has Brinell hardness of 360 HBW to 467