Spot welding is the most commonly used welding method in sheet metal and mass production applications, particularly in the automotive and sheet metal radiator industries. It is a system that increases productivity and operational safety while minimizing manufacturing costs.

For achieving high efficiency in spot and seam welding, Research and Development by "BRONZE ALLOYS" has optimized the process with CRM 16X®. CRM 16X® (CuCrZr) is the most advanced copper-chromium-zirconium alloy. It provides top-level performance with DIN 44759 Class 2>43 Siemens electrical conductivity, hardness of >160 HB (Brinell) or approximately 85 HRB (Rockwell B), and maximum physical strength of 590 MPa.

Spot and seam welding is generally applied to sheets with a thickness of 0.5 mm to 3 mm. When using CRM 16X®, all machine parameters must be properly adjusted according to the material being welded. For accurate parameter calibration, we recommend that all conductors from the transformer to the electrode be made of copper.

Welding surfaces must be clean from dirt, rust, and oil. Depending on sheet thickness, a current of 7.0 KA to 15 KA and a pressure of 3 to 7 bar should be selected. Spot distances should be set to 4 to 12 times the electrode tip diameter, and welding time should be between 1/10 and 1/4 seconds. Electrode tips must be properly cooled to prevent swelling. When tip diameter grows by 1/3 of its original size, it should be restored to standard size manually or using an electrode grinder. Standard tip diameters according to sheet thickness are approximately Ø2.70 to Ø6 mm.

By following these parameters with CRM 16X®, high-performance and high-quality welding can be achieved.