... crackle, abrasion, wear and tear, miscalculation in manufacture XKS-02 cast iron defect welding machine / weld pin hole machineMain ... crackle, abrasion, wear and tear, miscalculation in manufacture, defect in manufacture, welding defect.3. Suitable material:Aluminum material, ... medium, die steel, stainless steel, casting steel, cast iron, cast aluminum, tungsten carbide alloy, and all electrical ...