ASTM A335 P91 Alloy Pipe

ASTM A335 P91 is the steel grade of ASTM A335 standard. ASTM A335 P91 Alloy Pipe is a chrome moly alloy metal that contains excellent strength and temperature resistance. ASTM A335 P91 pipes are typically supplied in a normalized and tempered condition

ASTM A335 P91 is a high-temperature alloy steel pipe that is commonly used in power plants, chemical plants, and other industrial facilities. It has excellent high-temperature strength and resistance to corrosion, oxidation, and erosion.

They are available in various sizes and thicknesses, with a range of schedules and lengths. 

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. This process is the main reason behind P91’s creep strength and durability. P91 stands for the metal’s composition of 9% chrome and 1% molybdenum plus vanadium. The chrome increases temperature strength and oxidation resistance. The molybdenum increases the elasticity, resistance to wear, and high temperature creep strength. More characteristics to note of ASTM A335 P91 Type 2:

A335/SA335 P91 is a ferritic alloy steel that has very high strength properties, which do not deteriorate with time, and are creep resistant. It is also called 9 Cr 1 Mo steel, or chrome moly pipe, based on its composition.

In summary, ASTM A335 P91 is a high-performance alloy steel pipe that provides excellent high-temperature strength and resistance to corrosion, oxidation, and erosion. It is suitable for use in a wide range of industrial applications, including power plants, chemical plants, and other high-temperature environments.
 

ASTM A335 P91 Chemical Composition

A335 P91 Material Composition and Astm A335 Gr P91 Composition is given in above table

ASTM A335 P91 Properties

ASTM A335 Gr P91 Equivalent Material

SA335 P91 Pipe equivalent

Equivalent Standards: EN 10216-2, ASTM A213, ASME SA213, GOST 550-75, NBR 5603