Bobthewelder Australia has a great selection of copper-coated TIG rod designed for welding carbon and carbon-manganese steels with tensile strength up to 510 MPa. Applications include tanks, boilers, steel structural works, earthworks and construction works. It is used in root pass and to support the welding when no back pass is possible. Excellent mechanical and toughness properties when in low temperature conditions. AWS Specification / Industry Specification, A5.18 ER70S-6