Weld Mold 4010 description: Weld Mold 4010 is the most versatile welding alloy in the Weld Mold family of aluminum bronzes. It exhibits excellent mechanical properties for joining with an exceptionally low coefficient of friction for overlays. Which is beneficial in applications that involve sliding metal-to-metal wear. Clean weld areas of all foreign matter and debris. When overlaying iron base metals apply first layer at lowest possible amperage and weave to keep the base metal dilution to a minimum. Apply three passes where possible, keeping in mind that all slag must be thoroughly removed between passes.