Delta H provides two SCAHT tempering furnaces

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

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 (±25°F). 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.” 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.