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API-571 Exam - Question 1


__________ is a change in the microstructure of certain carbon steels and 0.5 Mo steels after long term operation in the 800º F to 1100º F range.

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Correct Answer: A

Graphitization is a change in the microstructure of certain carbon steels and 0.5 Mo steels after long term operation in the 800º F to 1100º F range. During this process, carbon precipitates from the steel matrix as graphite, leading to a reduction in the toughness and strength of the steel.

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ahmadmmOption: A
Sep 4, 2023

Graphitization is a change in the microstructure of certain carbon steels and ½Mo steels after long-term operation in the 800 °F to 1100 °F (425 °C to 595 °C) range