... CS70/SAE1065 3.professional work on cutting building spatula painting tool A high-carbon steel that can be oil or water ... 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 ...