Three Rivers Gray Iron

Metal Technologies Three Rivers Gray Iron (TRG) facility is a gray iron foundry specializing in small, medium to high volume iron castings.  The Three Rivers Gray Iron facility’s delivery and quality performance leads the industry, minimizing waste within its four molding line manufacturing footprint.  The management team draws upon their years of experience successfully operating one of the first vertical molding installations in the United States.  Three Rivers continues to be a state of the art gray iron foundry as our ownership invests in new capital equipment to keep up with the latest in foundry manufacturing technology.  Located in Southwestern Michigan, Three Rivers Gray Iron provides an excellent supply solution to manufacturers across North America in a variety of industries.

Facility Information

Capacity: 112,000 tons
Material: Gray Iron Classes FC250, G-2500, G-3000, G-3500, G-4000, and G-5000
Melt: Four ABB Induction furnaces with 25 ton per hour capacity
Molding: One Disa 230-A molding line
Three Disa 231-A molding line
Finishing Quality: Four 34 ftWheelabrator Tumble Blasts
Quality: IATF 16949:2016
ISO 9001:2015
ISO 14001:2015

Industries Served

Small Engine, Automotive, Heavy Trucks, Hydraulic, Trailer Axle, Industrial Power Transmission, Appliance, Gas – Water Valves, Agriculture and Refrigeration

Casting Type and Size

1 to 80 lbs. (.454 to 36.287 kg) Highly cored complex castings; non-cored small parts

Product Expertise

Power Steering Pump Housings, Valve Housings, Damper Hubs and Inertia Rings, Rotors, Drums, Idler Hubs, Shift Bar Housings, Plates, Covers, Flanges, Pillow Blocks, Water Pump Housings, Sprockets, and Pulleys



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