A335 refers to the executive standard: ASTM A335 seamless ferritic alloy steel pipe for high temperature
P91 is a material in the ASTM A335 standard:
I. Introduction to 10Cr9Mo1VNb:
10Cr9Mo1VNb is equivalent to T91 or P91 and implements the standard ASTM A213 ASTM A335. 10Cr9Mo1VNb not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good impact toughness and high and stable durability plasticity and thermal strength. When the use temperature is lower than 620 °C, 10Cr9Mo1VNb uses a higher stress than austenitic stainless steel. Above 550 °C, the recommended design uses stresses approximately twice that of T9 and 2.25Cr-1Mo steels.
Second, 10Cr9Mo1VNb application:
10Cr9Mo1VNb can be used as a subcritical, supercritical boiler wall temperature ≤ 625 °C high temperature superheater, reheater steel pipe, and wall temperature ≤ 600 °C high temperature collection box and steam pipeline, can also be used as a nuclear power heat exchanger and petroleum cracking device furnace tube.
Third, 10Cr9Mo1VNb chemical composition:
Fourth, 10Cr9Mo1VNb mechanical properties: