
Main application areas
Screw drill, drill collar, weighted drill pipe, joint material, coupling material, oil casing, line pipe, fishing tools, sulfur-resistant pipe body, etc
Representative steel grade
42CrMo/4140, 4145H/4145M, 4130M, 4137H, Q125, P110, L80-9Cr/13Cr, 1340, X80Q, X65Q, 4330V, etc