What is ASTM A335 P22 Pipe and its Features and Applications

what is astm a335 p22

astm a335 is a standard that refers to an alloy and p22 is it’s grade. alloy pipes contain higher percentages of alloying elements such as molybdenum (mo), chromium (cr), nickel (ni), and other elements. the astm a335 seamless pipes standard applies to “low-alloy” steel pipes, whose total alloying element content is less than 5%. higher percentages of alloying elements (for example, nickel and chromium) transform steel into higher alloys such as stainless steel, duplex steel, and super-alloyed materials such as inconel, hastelloy, monel, and other super-alloyed materials.

chemical composition of astm a335 p22

carbon (c)     –   from 0.05% to 0.15%

manganese (mn) –   from 0.30% to 0.60%

chromium (cr)    –   from 1.90% to 2.60%

molybdenum (mo) –   from 0.87% to 1.13%

phosphorus (p)   –    max. 0.025%

sulfur (s)   –    max. 0.025%

silicon (si)     –   max. 0.50%

mechanical properties

tensile strength, mpa  :  415 min

yield strength, mpa      :  205 min

heat treatment

type : full or isothermal anneal, or normalize and temper

tempering temperature range : 1250°f [675°c]

characteristics

some of the primary characteristics of p22 seamless pipes are mentioned below.

corrosion resistance

high tensile strength

wear resistance

smooth edges

enhanced strength

increased hardenability

astm a335 p22 applications

p22 is appropriate for high-temperature environments, such as those found in the following industries:

pharmaceutical equipment

seawater equipment

pulp and paper

off-shore oil drilling companies

chemical equipment

petrochemicals

it is also extensively used in making steam boilers, boiler parts, boiler drums, pressure vessels, condensers, and heat exchangers.