Specialty Steel Treating | 522 followers on LinkedIn. Specialists in Precision Controlled Heat Treating | Specialty Steel Treating, founded 1956, has been performing precision heat treating for more than 60 years. Since our inception, SST has always put quality and customer service at the forefront of our business philosophy. SST services numerous industries, ranging from but not limited to: Aerospace (military, commercial aircraft, space shuttle), Automotive & Truck, Industrial Bearing, Heavy Equipment and Tool & die.