Who we are

Founded in 1881 by Louis Zwahlen with a handcrafted production of art ironworks, the company has expanded over the years and today Zwahlen & Mayr is a primary contributor to the international industry.

We are active in two main sectors:

ZM Sectors

Since 1979, Zwahlen & Mayr has been a leading producer of welded stainless-steel and nickel alloy tubes under the brand ZM Tubes.

About ten years later (1990) Zwahlen & Mayr has started the production of the redrawn stainless-steel tubes and in 2021 the production of the seamless tubes.

Our tubes are manufactured in Aigle, close to Geneva Lake, and are 100% made in Swiss.

Thanks to continuous investment in machines and staff training, ZM Tubes is known throughout the world for its high-quality products, excellent customer service and reliability for critical applications.

Situated in the heart of Europe, logistically perfect to serve main European industrial areas, ZM is always ready to meet the innovative challenges of the market.

Environmental, social and corporate governance (ESG)

The ESG criteria are of fundamental importance to our company and represent opportunities in our investment processes.

For more than 10 years ZM has been committed to implementing solutions for the reduction of carbon emissions in the environment by being part of an agreements with act – Swiss Cleantech Agency.

Our determination is even stronger with the energy challenges we are currently facing. More than 20,000 m2 of solar panels have been already installed demonstrating the relevance of our commitment and opening the door to imminent developments towards new technologies, such as the production of green hydrogen on site.

At the company site, the installation of photovoltaic panels has been just completed, with a total capturing area of 20,000 square metres and an annual power output of 5 GWh


2021 - Seamless stainless tube department is set up.2018 - New TIG welding lines for diameters of 12 to 63,5 mm.2017 - New off-line furnace for redrawn tubes with outstanding capacity increase and degreasing machine.2015 - New investments: extension of production site up to 4,000 m2 and new laser or TIG lines up to 114 mm.2012 - Acquisition by Italian group CIMOLAI S.p.A.2010 - Acquisition of coil slitting machine in order to slit 1,500 mm wide coils of 20 tons.2002 - A new investment: ZM purchases from its main competitor complete redrawn tubes production line with a new 2,100 m2 production site.
1994 - 2 new welding lines are installed: after 12 years the annual production reaches volumes between 1,000 and 1,500 tons.1990 - New production line for redrawn tubes.1979 - Welded stainless steel tube department is set up.1964 - The rapid growth of the company necessitates a relocation of production from Lausanne to Aigle.1946 - ZWAHLEN & MAYR SA becomes an important competitor in steel construction.1918 - Eng. Henri Mayr steers the company’s activities towards steel construction.1881 - Louis Zwahlen sets up a workshop in Lausanne producing decorative wrought iron work.