A HISTORY OF METAL TREATING
H&M Metal Processing was founded in 1946 by Ernie Hedler and Art Marble. At the time, the company offered metal heat-treating services, including flame hardening, as well as black oxide coating. During the Korean conflict, the company expanded its capabilities by processing metal parts for the U.S. military and its allies, including tank tracks, breech blocks and brake discs. In the 1980s, the company increased its heat-treating services by developing its now trademarked Blacknitride+ process. The company continues to be a family-run business with R.S. McMillen at the head with children Shade, Ben and Alexandra in key roles.