Name: Chrome Moly Alloy Pipe
Availability: InStock

With the largest chrome inventory in the world, Sunny Steel 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 Sunny Steel 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.

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

Chemical

Grade

P-5

P-9

P-11

P-22

P-91

	K41545	S50400	K11597	K21590	K91560	P-91 shall also include the following:
Carbon	0.15 max	0.15 max	0.05 – 0.15	0.05 – 0.15	0.08 – 0.12	V at 0.18 – 0.25 N at 0.030 – 0.070 Ni at 0.40 max Al at 0.02 max Cb at 0.06 – 0.10 Ti at 0.01 max Zr at 0.01 max
Manganese	0.30 – 0.60	0.30 – 0.60	0.30 – 0.60	0.30 – 0.60	0.30 – 0.60
Phosphorous, max	0.025	0.025	0.025	0.025	0.020
Sulfur, max	0.025	0.025	0.025	0.025	0.010
Silicon	0.50 max	0.25 – 1.00	0.50 – 1.00	0.50 max	0.20 – 0.50
Chromium	4.00 – 6.00	8.00 – 10.00	1.00 – 1.50	1.90 – 2.60	8.00 – 9.50
Molybdenum	0.45 – 0.65	0.90 – 1.10	0.44 – 0.65	0.87 – 1.13	0.85 – 1.05

Tensile

	Seamless
		P-5	P-9	P-11	P-22	P-91

Tensile Strength, min., psi							P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
	ksi	60	60	60	60	85
	MPa	415	415	415	415	585
Yield Strength, min., psi
	ksi	30	30	30	30	60
	MPa	205	205	205	205	415

Place of Origin	China
Certification	BSI
Thickness	10, 30
Application	Hydraulic Pipe
Technique	Cold Drawn
Standard
Alloy Or Not	Is Alloy
Grade
Secondary Or Not	Non-secondary
Special Pipe	Thick Wall Pipe
Section Shape	Round
Outer Diameter	60, 300

Chrome Moly Alloy Pipe

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