Tri-j Metal Heat Treating CO.
Trij Metal Heat Treating provides full-service metal heat treating in the greater Los Angeles area. The company performs processes including neutral hardening, carburizing, austempering, carbonitriding, age hardening, stress relieving, annealing, normalizing, blackening, and glassbead cleaning on materials such as alloy steels, carbon steels, stainless steels, tool steels, brass, bronze, beryllium copper, and ductile iron. The company operates rotary retort furnaces with oil and salt quench, batch furnaces with internal oil quench and oxygen sensor controls, draw furnaces, and custom-built endothermic generators with oxygen sensor probes and dew point control, and holds ISO 9001:2015 and AS9100:2016 certifications.
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Tri-j Metal Heat Treating CO. | Pomona | CA | — | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.


