SA387 Gr91CL2 steel is equivalent to national standard 10Cr9MolVNbN, with high oxidation resistance and high temperature steam corrosion resistance. It has the properties of preventing hydrogen embrittlement, hydrogen corrosion, hydrogen stripping, sulfide corrosion and good low temper embrittlement at medium temperature (350~480) near hydrogen. It also has good impact toughness and high and stable durable plasticity and thermal strength performance.
When the service temperature is below 620, the allowable stress is higher than that of austenitic stainless steel. The recommended design allowable stress above 550 is about twice that of T9 and 2.25Cr-1Mo steel and has good intergranular corrosion resistance. SA387 Gr91CL2 steel plate has high brittleness resistance and good impact toughness under low temperature environment by using special smelting means to reduce the content of phosphorus.
SA387 Gr91CL2 material is suitable for adding complex reaction and conversion equipment refining and gas treatment at high temperature, the maximum thickness of the steel plate can be up to 250mm thickness, according to different thickness and impact requirements, SA387 Gr91CL2 steel heat treatment choose normalizing and tempering, or normalizing and rapid cooling and tempering.
SA387 Gr91CL2 steel plate can be used as subcritical and supercritical boiler wall temperature & LT; 625high temperature superheater, reheater Steel pipe, and wall temperature < 600 high temperature collector and steam pipe can also be used as nuclear power heat exchanger and furnace pipe of petroleum cracking unit.
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