... at high operating temperatures. Alloy 75 is also used in gas turbine engines, for components of industrial furnaces, for heat treating ... PrEN2307, AECMA PrEN2306, AECMA Pr EN2307, AECMA PrEN2402, ISO 9723, ISO 9724, ISO 9725Plate, Sheet, StripBS HR 203, DIN 17750, AECMA PrEN2293 ... , AECMA PrEN2302, AECMA PrEN2411, ISO 6208Pipe and TubeBS HR 403, DIN 17751, AECMA PrEN2294 ...