... material,we produce high strength and anti-corrosion sucker rod, cooperating with international leading manufacturer to produce ... several sorts of sucker rod such as Grade HL,HY,KD,D ... (MPa)Rel(MPa)A(%)200mmZ(%)Sucker Rod and Pony Rodφ16φ19φ22φ25φ29φ32φ38K620~795415 ... 50 NameSizeGradeRm(MPa)Length (m)High Strength φ16φ19φ22φ25φ29φ32KD795~9657.6208.0009.14010. ...