TFI Casing and Tubing ISO/API Casing Products ISO/API Tubing Products Large Size Casing Thermal Recovery Casing Coupling Products Wellheads & Christmas Tree Wellhead Equip. & Christmas Tree Casing Head Assembly Connection Types between Casing Head and Surface Casing Casing Head Body Casing Spool Body Casing Hanger Tubing Head & Christmas Tree Tubing Head Body Tubing Hanger PCP Wellhead TFI Line Pipe Line Pipe TFI Pumping Units TFI Pumping Unit API Sucker Rods Sucker Rod TFI Steam Generator Steam Generator		TFI Sucker Rod
		Sucker Rod Mechanics Performance
		Mechanical Performance Tensile strength σb(MPa) Yield Point σs(MPa) Extension radio δ(%) Reduction Of cross-Section ψ(%) Impact flexibility а ku　(J/cm2) Fatigue strength σ0.1 (MPa) Cycle (MPa) K 620~793 ≥372 ≥13 ≥60 ≥68.6 D 793~965 ≥62 ≥10 ≥50 ≥58.8 HL 966~1136 793~862 ≥12 45~55 540 >1~1000000 HY 980~1176 793~940 ≥12 45~55 540 >1~1000000
		Sucker Rod Materials Composition
		No Grade MATERIALS COMPOSITION C Si Mn Cr Ni Mo V Ti Cu P S 1 35Mn 0.32 ~0.39 0.17~0.37 1.40~1.80 ≤0.35 ≤0.30 ≤0.20 ≤0.025 ≤0.025 2 40Mn 0.37~0.44 0.17~0.37 1.40~1.80 ≤0.35 ≤0.30 ≤0.20 ≤0.025 ≤0.025 3 20CrMoA 0.17~0.24 0.17~0.37 0.40~0.70 0.80~ 1.1 ≤0.30 0.15~0.25 ≤0.20 ≤0.025 ≤0.025 4 35CrMoA 0.32~0.40 0.17~0.37 0.40~0.70 0.90~1.10 ≤0.30 0.15~0.25 ≤0.20 ≤0.025 ≤0.025 5 42CrMoA 0.38~0.45 0.17~0.37 0.50~0.80 0.90~1.20 ≤0.30 0.15~0.25 ≤0.20 ≤0.025 ≤0.025 6 20Ni2MoA 0.18~0.23 0.17~0.37 0.70~0.90 ≤0.35 1.65~2 0.20~0.30 ≤0.20 ≤0.025 ≤0.025 7 16Mn2Si 0.12~0.22 0.50~1.50 1.90~2.40 0.5~0.90 ≤0.30 0.15~0.30 0.05 ~0.20 0.005~ 0.03 ≤0.20 ≤0.025 ≤0.025 8 40CrMnMoA 0.37~0.45 0.17~0.37 0.90~1.20 0.90~1.20 ≤0.30 0.20~0.30 ≤0.20 ≤0.025 ≤0.025