PRODUCT >> Mechanical Property 1、API Drill Pipe Grade Stretching Strength Tensile Strength Extension Rate Impact Power Akv J Minimum Max Minimum Minimum 10×10 psi MPa psi MPa psi MPa % (-20 E75 75,000 517 105,000 724 100,000 689 API 5D Provisions 5 X97 95,000 655 125,000 862 105,000 724 1 G105 105,000 724 135,000 931 115,000 793 8 S135 135,000 931 165,000 1138 145,000 1000 4 2、API Tool Joint Minimum Stretching Strength Minimum Tensile Strength Minimum Extension Rate Impact PowerAkv J psi MPa psi MPa % 10×10 (-20 120,000 827 140,000 965 13 4 3、Drill pipe welding zone Grade Minimum Stretching Strengthσt MPa Minimum Tensile Strengthσb MPa Minimum Extension Rate 0.8mm % Impact Power Akv J E75 517 689 13 0 10×10 (20 X97 609 712 G105 655 724 S135 724 793 4、Drill collars External Diameter Stretching Strength σ0.2 MPa Tensile Strength σb MPa Extension Rate δ4 % Brinell Hardness HB Impact Power Akv J mm in 79.471.4 3-1/8-3/4 58 65 3 28541 4 177.879.4 71 89 30 3 28541 4