... CS70/SAE1065 3.professional work on cutting building spatula painting tool A high-carbon steel that can be oil or ... hardened, AISI 1070 also performs well in hand and machine tool applications.Heat treatment is carried out mainly for reducing sheet ... Nature, Polished bright, grey blue, polished blue, yellowEdge: Mill, Slit, Round, sheared/mill Tempers: Full hard, Soft for cold forming. Hardness as ...