Mersen in the USA
Committed to your progress in the USA
The American subsidiary of Le Carbone was created in 1907 in the United States.
Key figures
The Group employs around 1,300 people in the United States, spread over 16 industrial sites.
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16.00
sites
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1315.00
people
News
Related news
Products
Mersen Launches Critical Power Panelboard (CPP)
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Tradeshows
MERSEN to exhibit at IEEE APEC 2026
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News releases
Mersen selected by the U.S. Defense Logistics Agency to supply isostatic graphite
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New products
Mersen Announces Expansion to Surge-Trap® STXH 75kA Series
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Tradeshows
Mersen to Exhibit During Connecticut Aerospace & Defense Conference (CADC)
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Tradeshows
Mersen To Exhibit During 2025 Rockwell Automation Fair
Learn moreOur locations in United States
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Louisville, KYUnited StatesManufacturing site - Heat exchangers
1906 New Main Street
40206 Louisville
+1 502-893-6575 -
Metamora, MIUnited StatesManufacturing site - Graphite machining
MERSEN USA GS-GMI Corp
4141 S. Oak Street
48455 Metamora
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Newburyport, MAUnited StatesSales office - Fuses, SPD
MERSEN USA EP Corp.
374 Merrimac Street
01950 Newburyport
+1 978 462 6662 -
Robesonia, PAUnited StatesManufacturing site - Graphite machining
MERSEN USA GS-GMI Corp
70 East Meadow Avenue
19551 Robesonia
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St Marys, PAUnited StatesManufacturing site - Graphite production
MERSEN USA St Marys-PA Corp.
215 Stackpole Street
15857 St Marys
+1 814 781 1234 -
Rochester, NYUnited StatesManufacturing site - Bus Bars
MERSEN USA Rochester NY Corp
1500 Jefferson Road, Rochester
14623 Rochester
+1 585 784 2501 -
Salem, VAUnited StatesManufacturing site - Heat exchangers
MERSEN USA ACE CORP
540 Branch Drive
24153 Salem
+1 540-389-7535 -
Topton, PAUnited StatesManufacturing site - Graphite production
MERSEN USA GS-GMI Corp
240 Main Street
19562 Topton
Management system certification
Most of the Group's sites are certified for their management systems:
- Quality (ISO 9001, IATF and IRIS),
- Safety and/or Environment (ISO 14001, ISO 18001, ISO 45001 OHSAS, ISO 50001.) or
- Aeronautics, Defense, Space (ASD, EASE, EN9100).
To receive these certificates, please get in touch with your Mersen contact.
Anticorrosion Equipment
Service Centers
Mersen Anticorrosion Equipment Service Centers offer complete packages of services that optimize the life and performance of Corrosion Resistant Heat Transfer Equipment throughout their lifecycle.
From efficient preventive maintenance and inspection, to experienced repair and training, our goal is to keep your system operating at peak performance with minimum unplanned downtime.
History
As early as 1907, Mersen deployed its first team in the United States.
For 30 years, the company's main activity has been the sale of high-quality carbon brushes.
In 1936, the first truly American company, Le Carbone Co. Inc, was born, and began machining imported carbon plates. It was established in Boonton (NJ), which is still a major Group site.
Since the 1990s, the Group has made a large number of acquisitions in the United States, in particular for the advanced materials segment, Bay City (1990) and Stackpole (1991), and for the electrical power segment, Gould Shawmut (1999).
The last acquisition in the United States was made in 2024. It concerned GMI group (Graphite Machining, Inc.), an expert in the purification and machining of graphite, carbon and graphite composites.
Mersen, Energy to innovate