SAE Steel

Name:
SAE Steel
Detailed information:
A grade or type of steel indicated by a number system; they are principally plain carbon and of low to medium alloy content, used primarily in machine parts. The first two numerals designate either plain carbon or the alloy grouping and quantity, and the last two the mean carbon content in hundredths of 1%. Thus, 10 indicates carbon steels, 13 manganese steels; 40 and 44, molybdenum steels (the latter of higher alloy content); 50 and 51, chromium steels (the latter of higher alloy content); 41, chromium-molybdenum; 61, chromium-vanadium; 92, silicon and silicon-chromium; 46 and 48, nickel-molybdenum (the latter of higher nickel content); and 81, 94, 86, 87, 88, 47, 43, and 93, nickel-chromium-molybdenum in the order of increasing alloy content. The letter B between the first two and last two numerals indicates the presence of boron in amounts of 0.0005–0.003% as a depth-hardening addition.