polymer composite insulator end fitting Materials in C45,40Mn2, ductile iron Mechanical ... ,40Mn2, ductile iron2.Mechanical class 40kN - 210kN3.Hot galvanized coating protection against corrosion4.Materials testing acc.to EN10083-1,-2, AISI ... .to IEC 60383, ISO 14713, 1461, ASTM A123, A153 polymer composite insulator end fitting