Weld Mold 9580 description: A superior alloy designed especially for the extra tough hot and cold work tooling applications. To be used as welded without subsequent heat treatment. Weld Mold 9580 has exceptional wear characteristics at high temperatures. Ideal for press dies, screw press dies, and impactor dies. It is also used effectively for cold forming applications such as automotive trim sections, forming dies and blanking dies. Machinability is limited to EDM or grinding.