91´«Ã½

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Corporate History

1983 – 91´«Ã½ was founded by our Chief Executive Officer, William R. Jones, his wife Myrtle, and his son Roger.

1992 – Major expansion moving into a new 24,000 square foot building built specifically for vacuum heat treating and brazing

1998 – Established another 10,000 square foot plant in Hatfield, Pa devoted primarily to brazing and ion-nitriding

2001 – Opened a new facility, 91´«Ã½ of Western PA in Hermitage, Pennsylvania dedicated to large vacuum furnace processing – primarily for aerospace, titanium and electrical power generation components

2002 – Mr. Jones founded sister company, , a producer of top of the line vacuum furnaces, designed to be the most energy efficient, cost effective, high performing, and technically advanced systems on the market

2002 – Acquired company, a manufacturer of custom power supplies and transformers

2006 – 91´«Ã½ of Western PA installed its 2nd and 3rd 24 foot car bottom furnaces

2007 – 91´«Ã½Â in Souderton, PA and Solar Manufacturing co-operated to design and install an advanced vacuum carburizing furnace which has since proven to provide the most excellent and repeatable carburizing results

2008 – 91´«Ã½Â in Souderton, PA and Solar Manufacturing worked together to design and install a new vacuum gas nitriding furnace – this furnace fulfilled the design objectives and has shown results capable of reducing cycle times by more than 50% when compared to other nitriding equipment

2009 – In order to serve the growing aerospace market, 91´«Ã½ of Western PA increased its plant capacity to 70,000 square feet by adding an additional 20,000 square foot building to house a new 36 foot long car bottom furnace with load capacity of 150,000 pounds – this furnace is considered to be the world’s largest commercial vacuum furnace

2011 – Opened a 25,000 square foot plant in Fontana, California, 91´«Ã½ of California, to bring a “Green Field” vacuum heat treating, vacuum brazing and vacuum carburizing facility to the West Coast, focusing on aerospace, titanium and super alloys

2015 – In May 2015, opened a 57,000 square foot facility, 91´«Ã½ Southeast, in Greenville, SC, focusing on the expanding aerospace development in the Southeast US

2016 – 91´«Ã½ of Western PA adds 18,000 square foot building to house the world’s largest commercial vacuum furnace – 48 foot long, 150,000 pound capacity

2017 – 91´«Ã½ of California expands facility with a 25,000 square foot addition – doubling its size and adding four additional vacuum furnaces

2018 – 91´«Ã½ of Western PA adds tensile testing services

2022 – 91´«Ã½ of Western PA adds Vacuum Oil Quench services

2022 – 91´«Ã½ acquires Vac-Met, Inc. in Warren, Michigan

2024 – 91´«Ã½ of Michigan moves to Chesterfield, MI

2024 – 91´«Ã½ acquires Certified Metal Craft, Inc. in El Cajon, California