1, size of 5120/1.7147 alloy steel bar Round bar Diameter(mm) length (mm) 20~800 3000~9000 Plate Thickness(mm) width (mm) length (mm) Max:800 max:2200 max:9000 The specification can be customized. 2, chemical compositons C si mn p s cr mo ni 0.17-0.23 0.17-0.37 0.60-0.95 â?¤0.035 â?¤0.035 0.40-0.70 0.20-0.30 0.35-0.75 3, features of 5120/1.7147 alloy steel bar steel 1, hardenable chromium molybdenum nickel low alloy steel; 2, can be supplied in â??hâ?� condition with controlled hardenability; 3, provide controlled response from heat to heat; 4, typical core strength up to rc41. 4, typical applications 1, wide application in the automotive industry; 2, used for gears, ring gears, shafts and crankshafts; 3, for bearing races, pins and high tensile chains.