① carbon steel is the most obvious element of the solid solution strengthening effect, with increasing carbon content, short-term increase in the strength of steel, ductility, toughness down on this type of martensitic steel T91, the carbon content will rise accelerate carbide ball and gathering speed, accelerate the redistribution of alloying elements, reduce weldability, corrosion resistance and oxidation resistance of the steel, it is generally desirable to reduce the heat-resistant steel carbon content, but low carbon content, steel strength will be reduced. T91 steel imports compared with 12Cr1MoV t91 alloy steel pipe, reduce the carbon content of 20% t91 alloy, which is considering the impact of the above factors and decisions. Join chrome mainly to improve the oxidation resistance of heat-resistant steel, corrosion resistance, including when the chromium content of less than 5%, 600 ℃ began intense oxidation, while chromium amounted to 5% when it has good resistance to oxidation. 12Cr1MoV below 580 ℃ steel has good resistance to oxidation, corrosion depth of 0.05 mm / a, 600 ℃ when the performance begins to deteriorate, the corrosion depth of 0.13 mm / a. T91 chromium content increased to about 9%, temperature can reach 650 ℃, the main measure is a solution of the matrix more chrome. t91 alloy tube | Zhoushan t91 | Katherine source of steel provided by source Pipe Co., Ltd. Liaocheng trillion. Liaocheng Katherine source Pipe Co., Ltd. (www.lczygg.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Katherine source of innovative ideas will lead pipe and you work into the brilliant, for a better future!