Chrome Moly Alloy Pipe

With the largest chrome inventory in the world, Tioga carries a wide range of ASTM A335 / ASME SA335 chrome moly alloy pipe in a variety of lengths, ODs, IDs and wall thicknesses to meet your project’s needs—including pipe in hard-to-find sizes.

ASME SA335 / ASTM A335, Chrome-Moly pipe is the standard for seamless ferritic Alloy-Steel Pipe produced in nominal or minimum wall thickness for high temperature service. Pipe ordered to this specification shall be suitable for bending, flanging, similar forming operations and for fusion welding.

Chrome Moly products are named so due to the presence of the two elements Chromium (Cr) and Molybdenum (Mo). Cr increases the material’s resistance to corrosion and oxidation, and raises the material’s strength at high temperatures. Mo is known to increase tensile and creep strength at high temperatures, reduces brittleness, and improves hardenability. Sometimes referred to as "P Grade" materials or simply "Chrome", chrome moly pipe comes in more than 17 grades with the most widely used P-Grades being P5, P9, P11, P22 and P91.

It is commonly known that A335 / SA335 material is extensively used in a variety of plants & processes across the globe including refineries, power plants, petro-chemical plants, hydrocrackers, cokers, high and super high temperature lines, reheat lines, distillation, oil field services, etc. In general, the most commonly used P grades in refineries are P5 & P9. The most commonly used P grades in the power generation industry and petro-chemical plants are P11, P22 & P91. For more goto the Tioga article entitled "The Decision of the P Grades: How are different grades selected from the same SA335/A335 chrome moly specified material?"

Size Range- Nominal Pipe Size (NPS) 1/4" - 24"

Schedules:

STD, 40, XH, 60, 80, 100, 120, 140, 160, XXH

Specialty Pipe Sizes:

Larger than 24” OD available & wall thicknesses available up to 4", intermediate, average and min walls

Specification Header:

Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service.

Find out more about:

Chrome Fittings >
Chrome Flanges >

For more technical questions about the specification A/SA335 contact one of our sales people at 1-800-523-3678 or try online at Technical Questions

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Specification + Grade
ASTM ASME
A335 Grade P1 0% Chrome; ½% Moly SA335 Grade P1 0% Chrome; ½% Moly
A335 Grade P5 5% Chrome; ½% Moly SA335 Grade P5 5% Chrome; ½% Moly
A335 Grade P9 9% Chrome; 1% Moly SA335 Grade P9 9% Chrome; 1% Moly
A335 Grade P11 1-1/4% Chrome; ½% Moly SA335 Grade P11 1-1/4% Chrome; ½% Moly
A335 Grade P12 1-1/4% Chrome; ½% Moly SA335 Grade P12 1-1/4% Chrome; ½% Moly
A335 Grade P22 2-1/4% Chrome; 1% Moly SA335 Grade P22 2-1/4% Chrome; 1% Moly
A335 Grade P91 9% Chrome; 1% Moly + trace elements SA335 P91 A335 9% Chrome; 1% Moly + trace elements

Download the pipe specification chart

ASTM A335/SA335 - 15a Specification Details

Common places to find ASTM A335/SA335 Pipe