Material: Carbon Steel, Alloy Steel.Grade: ISO 4, 5, 6, 8, 10 SAE Gr. 2, 5, 8 A563, A194 DIN439 / DIN555 / DIN934 / DIN936 / DIN6915 / DIN6334 ISO 4032 / ISO 4033 / ISO 4034 / ISO 4035