SA387GR91CL2 (P91 for short) has high oxidation resistance, corrosion resistance under high temperature steam environment, impact toughness, high and stable durable plasticity and thermal strength, which is used in subcritical boiler, supercritical boiler and nuclear power heat exchanger, etc.

SA387GR22 (GB 12Cr2Mo1R) is pearlitic heat-resistant steel with high thermal strength and high temperature oxidation resistance. It is mainly used in the manufacture of pressure vessel equipment for high temper- ature, high pressure and hydrogen environment, most of which are used in hydrogenation equipment in oil refining and chemical industry.