Spot Welding
Questions and Answers
Group B materials is a designation of the Resistance Welding Manufacturers Alliance (RWMA). It describes a group of Tungsten/Copper materials with high strength and good electrical conductivity. Their main feature is high strength at high temperatures. Their properties make them excellent materials to use in the resistance welding industry as electrodes at high heat and forces.
Group A material is a designation of the Resistance Welding Manufacturers Alliance (RWMA). It describes a group of copper alloys with high strength and high electrical conductivity. Their properties make them excellent materials to use in the resistance welding industry as electrodes and current carrying componenets used in the machinery of the resistance welding industry.
Class 14 material is a designation of the Resistance Welding Manufacturers Alliance (RWMA). It describes a pure Molybdenum material with good conductivity and excellent strength at high temperatures and forces. It is used as electrodes for cross were welding and electrobrazing.
Class 13 material is a designation of the Resistance Welding Manufacturers Alliance (RWMA). It describes a pure tungsten material with good conductivity and excellent strength at very high temperatures and forces. Class 13 is the most heat tolerant of the refractory materials. It is used for cross wire welding and electrobrazing as the electrode material. High heat and force applications are where it does it best job.
Class 11 material is a designation of the Resistance Welding Manufacturers Alliance (RWMA). It describes a Tungsten/Copper base material with good conductivity and excellent strength at high temperatures and forces. Class 11 is often used as a back up electrode for projection welding.
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