About Us

Heat Treating Services Unlimited, Inc. is a global field services and accredited testing and calibration laboratory specializing in the thermal processing industry. HTSU is the leading authority for heat treat equipment maintenance, calibration, repair, consulting, testing and training services. Since 1998, we have enabled companies to increase both uptime and overall longevity of their equipment.

“Unlimited” truly defines our company. To be a trusted source for thermal processing, you have to have a firm belief in keeping customers satisfied day-in, day-out. To achieve 100% satisfaction, you must have ambitious people committed to overcoming any obstacle in their path. At HTSU, our promise toward accuracy, quality and safety is never-ending.

Based in Greenville, S.C., HTSU has five offices with service contracts in more than 30 states, Canada, Costa Rica, Germany and Puerto Rico. We have reshaped our portfolio, bringing complementary services to strengthen to HTSU’s position in the marketplace. The result is a multi-business thermal processing service company. We help companies build a better enterprise. We keep them running.

HTSU: The Thermal Processing Professionals