Welding CCT diagrams of steels are the basic to select welding material, determine the optimum welding technology, relieve welding cracks and lay down standard of past heat treatment.

So it is not practical to improve the heat resistance significantly in breeding by heterosis, but it is supposed to select the heat tolerant parent in breeding.

This article tells how to select the structure of organic heat carrier boiler, arrange the heated surface and prepare precess flow.