42CRMO ALLOY STRUCTURE STEEL

Related Specifications Germany 1.7225 USA 4140 GB 42CrMo Sweden 2244 Japan SCM440 Chemical Analysis C  % Mn % Si  % Cr % Mo % 0.37-0.44 0.5-0.8 0.17-0.37 1.0-1.2 0.2-0.4 Delivery condition: Hot rolled, hot forging, annealed, normalized Hardness: HB180-230, HRC 28-35 Size availability Type Thickness mm Width/Diameter mm Length mm Flat 20-400 200-2000 2000-6000 Round bar 20-800 2000-10000 Main Feature: Hardness is uniform, the center and surface polishing property is +/- 2 ? when thickness is below 700 mm. Good mechanical property and can be imposed of nitrogenization. Normally be used after hardening and tempering. Application: For mechanical parts manufacturing like axle, gear, connecting rod, transmission gear, supercharger gear, motor cylinder stator, spring and pinch cock. 1200-2000mm steel for petroleum drill pipes Jar knocker