Originating in 1935 as the Resistance Welder Manufacturer’s Association (RWMA) to develop and promote key advances in metals manufacturing, the RMWA became an AWS Standing Committee in 2005 to better align resources and share a common vision of welding excellence, and renamed the organization Resistance Welding Manufacturing Alliance.

RWMA is a group of professionals dedicated to the advancement of the resistance welding process. In June 2005, the American Welding Society (AWS) assumed management of RWMA as a Standing Committee of AWS. The committee includes regular membership, which includes machinery, component and copper product manufacturers, along with an associate membership of end users, distributors, suppliers and educators. Combined, the members represent a dynamic force for promoting the resistance welding process and establishing standards in the industry. 

Resistance Welding Process
Resistance welding uses heat and force to create a bond between two base metals. There are several different forms of resistance welding such as spot, seam, and projection welding. The differences between the three involve the types and shapes of weld electrodes used and the actual process involved. Weld electrodes are used to actually conduct the heat to the base metals as they are forged together. These electrodes are usually made of copper because of its conductivity and low resistance. Generally, water is used to cool the electrodes during the process. Water flows inside the cavity of the electrode, thus removing excess heat. Many different types of welding machines can be built to fit many various types of applications.

Find Us
RWMA offers year-round availability as well as quarterly newsletters that are sent to our members. RWMA works to educate and enlighten its membership with the latest issues and trends in the welding industry. The networking available to you and your organization will far exceed your own capabilities as an individual.

RWMA's Objectives:

  • Promote the technical and economic advantages of resistance welding.
  • Support education relating to the safe and proper use of equipment and accessories used for resistance welding.
  • Promote the advancement of standards and practices relating to the design, testing, installation, operation, and maintenance of resistance welding equipment.
  • Support the development and use of process and procedure standards relating to the appropriate uses of such equipment.
  • Encourage industry participation, networking, and the highest standards of conduct.