Zwahlen & Mayr SA engages in welded stainless-steel tubes production and steel construction businesses in Switzerland. The company produces stainless steel and nickel alloy tubes, such as welded tubes and redrawn tubes under the ZM Tubes name for the conventional and nuclear power stations, chemical and petrochemical plants, petroleum refineries, pulp and paper, air treatment, dairy, automotive and aerospace, mechatronics, pneumatic, oil and gas, and instrumentation applications, as well as pharma, food, and chemical industries. It is also involved in the steel construction of bridges, buildings, and special projects. The company was founded in 1881 and is headquartered in Aigle, Switzerland. Zwahlen & Mayr SA is a subsidiary of Cimolai SpA.