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Studies on P91 Steel


D. Dhivyabharathi , Government College of Engineering Salem - 11; Dr. K. Venkatesan, Government College of engineering salem; P. Sundararaj, Government College of engineering salem


P91 Steel, Chromium- Molybdenum Steels, PWHT


Chromium – Molybdenum steels are used mainly in power plants, fertiliser plants and oil refineries at service temperatures up to 704°C. They are distinguished from other low- alloy steels by their remarkable oxidation resistance, resistance to sulphide corrosion and high – temperature strength or creep resistance. These properties are derived from Cr and Mo and they improve with the increase of these alloying elements. There are NINE standard types as shown in Table 1 along with their chemical compositions. It is seen that the Mo content is either around 0.50 or 1.0% according to the Cr content of the steel. The 2.25Cr –1Mo steel has the best thigh temperature strength. They are usually supplied in the annealed or normalised and tempered condition.

Other Details

Paper ID: IJSRDV7I20769
Published in: Volume : 7, Issue : 2
Publication Date: 01/05/2019
Page(s): 961-963

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