... elevated temperature, insensitive to constant temperature change, low P and S content, suitable for water cooling. This grade can ... holders, dummy blocks, pressure pads, bolsters, dies and containers for metal tube and rod extrusion, hot extrusion tools, single block inserts ... die inserts, die casting tools, hot forming dies, hot gripper and header dies. Heat Treatment:Annealing : 750 - 800 °CHardness ...