Nickel Welding Wires: Different Usages and also Performances. Nickel Welding Wires: Different Usages and also Performances. weldermetals.com PRODUCTS Click to see more details about our products. Learn More MIG Welding Wires MIG welding wires are mainly used for welding Stainless steel , Aluminium alloy , or Nickel alloy . An appropriate a