Metrode Met-Max-307R description: Mixed welding applications including the welding of mild, stainless, hardenable, and armour steels to themselves or each other with or without preheat. Tolerance to dilution (resistance to hot cracking) is provided by the high manganese content, unlike armour welding and 309 types which depend on a high ferrite level. In some cases, they may offer an alternative to high nickel weld metal in joints between cast iron and stainless steels. Weldments subject to PWHT retain ductility with satisfactory toughness down to -500C.