Why Outsource Heat Treating

The Metal Treating Institute is a non-profit trade association that represents the largest network of commercial heat treaters in the world with members in 38 states and 7 countries.  MTI's network services every major industry and performs every heat treating process required for your projects.

About CallMTI.com

CallMTI.com is the outsourcing website where buyers of heat treating services can connect with the largest network of commercial heat treaters in the world...the Metal Treating Institute (MTI).


The Metal Treating Institute, a non-profit trade association established in 1933, has been the leading provider of heat treating services around the world.  With plants in 40 states and 8 countries, MTI members can virtually meet any customer’s needs no matter what size, project, process, or quality.

Combined, MTI members perform every process known to heat treating, hold every certification required for the highest levels of quality assurance, and have metallurgical and engineering expertise second to none.

Industries We Service

  • Aerospace
  • Agriculture
  • Automotive
  • Basic Steel
  • Forgings
  • Foundries
  • Home Appliances
  • Marine
  • Materials Handling Equipment
  • Medical
  • Military
  • Mining Equipment
  • Petroleum / Utilities
  • Production Machinery
  • Railroads
  • Stampings
  • Tooling
Sample Customers

  • Alcoa
  • Boeing
  • Briggs & Stratton
  • Caterpillar
  • Chrysler
  • Eaton Corporation
  • General Motors
  • GE Steam Turbine
  • General Dynamics
  • Goodyear Aerospace
  • Harley Davidson
  • Honda
  • Intel
  • John Deere
  • Kohler
  • Lear Corporation
  • Snap-On-Tools
  • The Timken Company
  • Toyota
  • United States Military
  • Johnson Controls