The United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union ( United Steelworkers or USW) with 722,000 active members, one of the largest industrial trade unions in North America. It represents workers in the U.S. and Canada.
Headquarters of the union is Pittsburgh in the U.S. state of Pennsylvania.
The USW was founded as a " USWA " on 22 May 1942 by members of the " Amalgamated Association of Iron, Steel, and Tin Workers " and " Steel Workers Organizing Committee". Previously, there had been frequent, sometimes violent clashes of striking workers and strikebreakers or the police. First president of the union was a co-founder Philip Murray.
In June 1944, the 46,000 members of the " Aluminum Workers of America ," an association agreed with the USWA. Over the years, another trade unions of the United Steelworkers at: the " International Union of Mine, Mill and Smelter Workers " (1967), "United Stone and Allied Product Workers of America " (1971), "Allied and Technical Workers of America " (1972 ), " Upholsterers International Union of North America" (1985 ), "United Rubber, Cork, linoleum & Plastic Workers of America " (1995), " Aluminum, Brick and Glass Workers Union " (1996), the Canadian portion of the "Transportation Communications International Union " ( 1999), "American Flint Glass Workers Union " (2003), " Industrial, Wood and Allied Workers of Canada " (2004) and lastly the "Paper, Allied- Industrial, Chemical and Energy Workers International Union "(2005).
Since this last merger, the union bears its current name, " United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union."
In addition to the associations, the union has received numerous strategic partnerships with other unions.