Delta H® provides Winston Heat Treating two SCAHT tempering furnaces


Delta H® recently supplied twin SCAHT®-HD (heavy-duty) Series convection furnace systems to Winston Heat Treating.

The furnaces replaced older tempering systems that were extremely difficult to qualify to even Class 5 (+/- 25F). Pyrometry expert Andrew Bassett of Aerospace Testing and Pyrometry (ATP) recommended to Winston Heat Treating management the acquisition of Delta H furnaces as “the easiest furnace brand to qualify and maintain for aerospace pyrometry compliance, for this specific application.”

Twin SCAHT®-HD tempering furnaces certified for aerospace parts production. (Courtesy: Delta H)

The furnaces had to be heavy-duty for rugged daily use in a commercial heat-treating facility. Another challenging aspect was the ability to heat rapidly but also to cool just as fast, without damage to interior metal as a load heat treated at 1,000°F could be quickly followed by the next at 300°F. The result is that the new Delta H furnaces can heat and cool in a fraction of the time of the previous systems.

ATP independently demonstrated both systems as capable of passing Class 1 uniformity (+/-5°F), throughout the operating temperature range, but qualified them as Class 2 (+/- 10°F) from 300°F to 1,200°F. Both are set up with instrumentation Type B and feature two load thermocouples.

The furnaces feature a guaranteed certified TUS volume of 2 feet wide, 1.5 feet high, and 2 feet deep with a maximum continuous operating temperature of 1,200°F. Both are designed to receive baskets of parts from many nearby heat-treating operations for secondary heat treatments. Temperature control and data acquisition are provided by Super Systems and feature the SSi 9130 controller/programmer. Both furnace systems were quickly integrated into their Super Data facility monitoring system with zero learning curve.

The SCAHT®-HD Series is available in a variety of sizes with current models featuring a guaranteed TUS volume up 2’ x 2’ x 4’. All models feature the high-performance characteristics and attention to detail that have distinguished Delta H for compliance to strict aerospace and Nadcap standards.

“We were looking for a partner to replace existing tempering furnaces that had become too costly to maintain and could no longer meet required pyrometry standards,” said David Reger, president, Winston Heat Treating. “Our goal was to install reliable and modern furnaces that were specialized for our small batch/job shop work. Delta H delivered exactly that as well as outstanding technical and service support. When it’s time to sunset the remaining tempering furnaces in that department, Delta H will be our first call.”