Use these bronze flux-coated rods (4-pack) to tackle steel, copper metal and cast iron repairs. These rods provide reliable corrosion resistance for long-term use and are designed for use on brass, galvanized iron, stainless and chrome-plated materials. These are designed for brazing, hard soldering and welding with a tensile strength of 50,000 to 60,000 PSI, and a working temperature of 1,595 to 1,630 degrees F. Features: Flux-coated bronze rods are ideal for general-purpose repairs of steel, cast iron and copper metals Working temperature of 1,595 degree F to 1,630 degree F or 868.3 degree C to 887.7 degree C Includes four 12 in. rods Tensile strength of 50,000 to 60,000 PSI