SAF Toolfro description: TOOLFRO is a basic coated MMA electrode for surfacing applications on tool steel. Typical applications are tools, including hot working, such as shear blades, dies, punches, pressing tools. Good warm hardness and excellent service life. Weld metal hardness of 58HRC in the as-welded condition, it can reach 65HRC after Quench an Temper. Deposit a maximum of 3 layers. Weld metal can only be machined by grinding. Excellent weldability in all position except Vertical Down and Overhead positions. Shall be used in DC+ or AC current.