ASTM A335 P2 Alloy Steel Seamless Pipe - A335 P2 Chrome Moly Pipe

ASTM A335 P2 Alloy Steel Seamless Pipes: Supplier & Exporter

USA Piping Solution is a leading manufacturer, supplier, and exporter of ASTM A335 P2 Pipes. More commonly known as A335 P2 Alloy Steel Pipe or SA335 P2 Chrome Moly Pipe, this material is a fabricated seamless ferritic alloy steel pipe developed for enhanced high temperature and high pressure performance. It has excellent creep strength and exceptional effectiveness within pressure applications, which makes it an optimal material for critical components required in power producers, oil and gas, and petrochemical sectors. We maintain a large stock of various size and schedule P2 pipes, and we consistently source from reputable, tested and certified mills. Therefore we provide high quality pipes for all your projects, as needed.

What are ASTM A335 P2 Pipes?

ASTM A335 P2 is a recognized specification for seamless pipes made of ferritic alloy steel that is commonly used at high temperatures. The grade of A335 P2 is only a part of the much larger A335 specification, which also includes "P-grades" for chrome-moly (alloy) pipes. A335 Gr P2 Pipe is a chromium-molybdenum (Cr-Mo) alloy with a targeted chemical composition that gives it strong characteristics in resistance to high temperatures and excellent creep properties. The seamless manufacturing process, which means it has a uniform wall thickness without weld seams, ensures that it is a reliable piping material for high-pressure applications that require a high level of reliability and safety. The strength of stress relieving methods with thermal stresses gives it built-in durability and resistance in a range of piping applications.

ASTM A335 P2 Pipes Specifications

The ASTM A335 P2 Pipes are manufactured (produced) and inspected to meet or exceed international standards. We deliver a full (extensive) range of pipes in corresponding specifications to accommodate (adapt to) industrial needs.

Specification	Details
Standard	ASTM A335, ASME SA335, EN 10216-2
Size	½” NB to 24” NB (Nominal Bore)
Schedule	SCH 20, 30, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS. We also provide custom wall thicknesses.
Type	Seamless
Ends	Plain End (PE) and Bevelled End (BE)

Chemical Composition of ASTM A335 P2 Pipes

Element	Content (%)
Carbon (C)	0.05-0.15
Manganese (Mn)	0.30-0.60
Phosphorus (P)	0.025 max
Sulfur (S)	0.025 max
Silicon (Si)	0.10-0.50
Chromium (Cr)	0.50-0.81
Molybdenum (Mo)	0.44-0.65

Mechanical Properties of ASTM A335 P2 Pipes

Property	Value
Tensile Strength	415 MPa (60,000 psi) min
Yield Strength	205 MPa (30,000 psi) min
Elongation	30% min

Equivalent Grades of ASTM A335 P2 Pipes

ASTM A335 P2 has several equivalent grades, allowing for global interchangeability across different standards.

Country	Standard
Germany	DIN 17175: 15Mo3
Japan	JIS G3458: STPA22

Dimensional Tolerances of ASTM A335 P2 Pipes

The dimensional tolerances for our ASTM A335 P2 pipes are strictly controlled to ensure a precise fit in complex piping systems.

Outside Diameter (OD)	OD Tolerance
Up to 48.3 mm	+0.40/-0.80 mm
60.3 to 114.3 mm	+0.40/-0.80 mm
139.7 to 273.1 mm	+0.40/-0.80 mm
323.9 to 508.0 mm	+0.40/-0.80 mm

Wall Thickness Tolerances

Wall Thickness (WT)	WT Tolerance
Up to 2.5 mm	+0.25/-0.25 mm
2.5 to 5.0 mm	+0.30/-0.30 mm
5.0 to 10.0 mm	+0.40/-0.40 mm
> 10.0 mm	+0.50/-0.50 mm

Applications of ASTM A335 P2 Pipes

Pipes using ASTM A335 P2 material play a critical role in the demanding service conditions of high temperature and high pressure. P2 pipes have more chromium and molybdenum than other standard pipe materials, enhancing creep resistance and durability. Reliable industrial service in these conditions is critical in industries where system failure is not acceptable. Typical applications for ASTM A335 P2 material include:

Thermal Power Stations: Typically found in superheaters tubes, reheater tubes and high-pressure steam pipes operating above 500 °C.
Oil Refineries: In vapour-phase service for catalytic reformers, and hydrocrackers, furnace tubes where there is high-pressure hydrogen, and thermal cycling.
Petrochemical Plants: Where long-term designed service is required such as in process heaters, reactor piping and critical steam systems that must operate reliably under cycling conditions
Boiler and heat exchangers: High pressure boiler tubes, feedwater systems, and various steam generators where corrosion and creep resistance is essential.
Chemical processing units: Reactor piping and processing lines where the steam or gaseous service is severely corrosive.
Industrial Infrastructure: Lifting pipelines within steel, fertilizers and other heavy industrial facilities directly exposed to demanding service.

Why Choose USA Piping Solution for ASTM A335 P2 Pipes?

With P2, we emphasize performance, safety, and compliance, ensuring clients receive pipes built for the most demanding applications.

Choosing the right partner for ASTM A335 P2 pipes will give you confidence that your system will run without failure. USA Piping Solution is the preferred partner for you, why?

Products specialized in the critical alloys that are applied in the high-stress use
Stringent quality control processes corresponding with MTC, IBR and NACE
Customizable wall thickness, lengths and end types
Proven track record in supplying clients in the power, refinery, and petrochemical markets
Capability to assure on-time delivery across the globe on massive infrastructure projects

With P2, you will benefit from a focus on performance, safety and compliance with your pipes that will be applied to clearly demanding applications.

Get a Quote for ASTM A335 P2 Pipes

Looking for ASTM A335 P2 pipes for high-pressure or high-temperature applications? We provide pipes that are tested for quality and certified and we can support your supply requirements globally. Therefore, you can request a quote so we can provide a reliable, project-specific solution.

Request a Quote

Frequently Asked Questions

What is the main difference between ASTM A335 P2 and ASTM A335 P1?

The difference lies in the chemical composition of the material. ASTM A335 P2 has a slightly higher content of Chromium (0.50-0.81%) and Molybdenum (0.44-0.65%) than P1. This small increase in alloy content provides P2 with enhanced performance at high temperatures making it more suited to harsh conditions.

What is "Chrome Moly" pipe?

"Chrome Moly" is an industry term for pipes made from a Chromium-Molybdenum Alloy steel, such as ASTM A335 P2. Chromium (Cr) provides strong corrosion resistance and oxidation resistance at elevated temperatures. Molybdenum (Mo) improves the overall strength, elasticity and creep resistance of the steels construction. Together it makes a robust stable material that is designed for high heat, high pressure applications.

Is ASTM A335 P2 pipe suitable for high-pressure systems?

Yes, certainly! ASTM A335 P2 pipes are produced as seamless material, so there are no risks of welded seams. Seamless pipes assure a uniform wall thickness through the entire structure and well understood structural reliability for the transport of fluids at high pressures and temperature, in critical systems such as power plants and refineries.

How do I ensure the quality and authenticity of the pipes I receive?

At USA Piping Solution, we provide complete documentation with every order of ASTM A335 P2 pipes. This includes a Mill Test Certificate (MTC) detailing the chemical analysis and mechanical properties of the specific lot. If requested, we can provide third-party inspection reports for additional, fully traceable, assurance that the material quality and compliance are intact.

What are the primary applications for ASTM A335 P2 pipes?

ASTM A335 P2 pipes are utilized predominantly in industries that routinely operate at high temperatures and pressures. Other applications include steam lines, boiler tubes, heater and super-heater tubes, and heat exchanger tubes used at thermal power generation plants, as well as for piping systems used in critical applications at oil and gas refineries and petrochemical facilities.