Ifintu ifya kubalilapo ifibomfiwa mu fipe fya kufimbapo ne fipe fya kufimbapo umulilo ni cimuti ca carbon icacepa, ukutenta kwabomfiwa mu cituntulu kuli mupepi na 200 digiri C, kabili ukukakatika kuli fye 0{2Inyuni {6Fars nga ca kuti umulilo ulebomfiwa ne cimuti icacepa, pamo nga 20g, umulilo wa 200 100 taulecila pa cipimo ca 400 ica 850 ica maka, te kuti cifike pa cipimo ca 400 power plants, the working pressure has increased rapidly, and the use temperature of modern heat-resistant steel has reached 700℃C, and the use environment has become more complex and harsh. The temperature range of heat-resistant steel is 200 ~ 1300℃, the working pressure is several mpa to tens of mpa, and the working environment is developed from a simple oxidation atmosphere to a vulcanized atmosphere, a mixed atmosphere and a more complex environment such as umucele uwasunguluka ne fyuma fya menshi.
