P9 pipes of the ASTM A335 grade are produced with higher alloying elements compared to general carbon pipes. The ASTM A335 P9 Pipe is composed of chemical composition of 8-10% chromium, 0.25-1% silicon and 0.90-1.10% molybdenum. It also has small amounts of carbon, manganese, phosphorous, and sulfur.
P91 is a chrome moly alloy metal that contains excellent strength and temperature resistance. It is designed for enhanced creep strength, making it a creep strength enhanced ferritic (CSEF). This metal is made by normalizing at 1050 °C, air cooling to 200 °C, and then tempered through heating to 760 °C.
P91 is a modified form of P9 (9 percent chromium, 1 percent molybdenum) steel. The steel can have low impurity limits, thanks to the development of processes such as argon-oxygen decarburization (AOD) and electroslag remelting (ESR), which make the steel behave consistently during fabrication and resist the effects of aging. When properly heat-treated as specified in ASTM specification A335, the steel acquires room temperature properties.
BBN steel can supply P9 and P91 steel. If you have these demands, please contact us freely.
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