What is ASTM A335 P5 seamless pipe?

We also call ASTM A335 P5 seamless pipe as ASME SA335 P5 Chrome-Moly pipe, it is a type of seamless steel boiler pipe could be used in high temperature environments of 540 – 750 °C.

The A335 P5 pipes are generally called chrome moly pipe as they have a high level of Chromium and Molybdenum presence in it. While Molybdenum increases the overall strength, resistance, elasticity, hardenability and overall quality, moly ensures that the material is more resistant to softening, restrains the growth of grains and lessens the chances of embrittlement. It is the single additive that is responsible for the increase in high temperature resistance and it also improves the corrosion resistance to steel.

Key Elements Chromium for ASTM A335 P5 seamless pipe
Chromium is a key component that is used in the manufacture of stainless steel. If the chromium levels are above 12%, it can be classified as stainless steel. The oxidation resistance potential of chrome is irreplaceable even in elevated temperatures. The hardness, tensile and yield strength is better at standard temperatures. Due to the composition of the ASTM A335 P5 seamless pipe material, it is ideal to be used in power plants, refineries, petro-chemical plants and other oil field services when there is transportation under high temperatures and pressures involved.