Hardened and Tempered Steel :heat treatment cold rolled carbon steel, used in the manufacture of woodworking band saw, circular saw blade etc. Hardened and Tempered Steel :heat treatment cold rolled carbon steel, used in the manufacture of woodworking band saw, circular saw blade etc. Customized processing and production of hardened and tempered steel strip according to customer needs. Mature heat treatment technology and complete metal processing production lines will surely provide you with stable and high-quality steel strip products.