What is A335 P22 material?

ASTM A335 P22 is a seamless alloy steel pipe, often called "2 ¼ Chrome" pipe. It's made with chromium (approx. 2.25%) and molybdenum (approx. 1%) added to carbon steel, giving it excellent strength for high-temperature services.

What is the typical hardness of ASTM A335 P22 pipe?

After proper heat treatment, ASTM A335 P22 pipe typically has a maximum hardness of 250 HBW (Brinell Hardness). This ensures a good balance of strength and toughness for its intended applications.

What is the recommended temperature range for ASTM A335 P22 pipe?

ASTM A335 P22 pipes are designed for high-temperature service, typically suitable for continuous operation at wall temperatures up to around 590-600°C (1094-1112°F). Specific heat treatment (like normalizing and tempering) ensures it performs well in this range.

What is the main difference between P22 and P91 pipes?

Both are chrome-moly pipes, but P91 has much higher chromium (around 9%) and added elements like Vanadium and Niobium. This makes P91 stronger and more creep-resistant at even higher temperatures than P22 (which has about 2.25% chromium). P91 is a "Creep Strength Enhanced Ferritic" (CSEF) steel.

What is the chemical composition of ASTM A335 Gr P22?

The typical P22 chemical composition includes, Chromium (Cr): 1.90-2.60%, Molybdenum (Mo): 0.87-1.13%, Carbon (C): 0.05-0.15%, Manganese (Mn): 0.30-0.60%, Silicon (Si): 0.50% max, Phosphorus (P) & Sulfur (S): Low limits (e.g., 0.025% max each).

ASTM A335 P22 Pipe | ASME SA335 P22 Seamless Alloy Steel Pipe Supplier

Seamless Ferritic Alloy Steel ASME SA335 P22 Pipe for High Temperature Service

Robust ASTM A335 P22 Pipes for high-temperature, high-pressure service from Amardeep Steel

ASTM A335 P22 Pipe / ASME SA335 P22 Pipe is a chromium-molybdenum (2.25Cr-1Mo) alloy steel pipe that is used in high-temperature and high pressure services. This grade is extensively used in power plants, refineries, petrochemical units and boiler systems where high temperature strength and creep resistance are essential.

We are a leading A335 P22 pipe suppliers and manufacturer offering ready stock of seamless alloy steel pipes in various sizes and schedules for domestic and export projects. ASME SA335 P22 Pipe is the equivalent material grade specified under the ASME pressure vessel code and is commonly used for critical superheater and reheater systems.

Table of Content

ASTM A335 P22 Pipe Specification
A335 P22 Chemical Composition
Mechanical Properties of ASME SA335 P22 Pipe
Heat Treatment of Chrome Moly Alloy ASTM A335 Pipe
Dimensions & Size Range of ASTM A335 P22 Seamless Pipes
Manufacturing Process of ASTM A335 P22 Alloy Steel Seamless Pipes
Applications of ASTM A335 P22 Pipe
Related Products

ASTM A335 P22 Pipe Specification

ASTM A335 P22 covers seamless ferritic alloy steel pipe intended for high-temperature service. The material contains approximately 2.25% Chromium and 1% Molybdenum, providing excellent strength, oxidation resistance, and long-term creep resistance at elevated temperatures exceeding 500°C.

Property	Details
Standard	ASTM A335 / ASME SA335
Grade	P22
Material Type	Alloy Steel (Chrome Moly)
Pipe Type	Seamless

A335 P22 Chemical Composition

The a335 p22 chemical composition ensures improved oxidation resistance and enhanced creep strength under sustained high-temperature service conditions.

Element	% Composition
Carbon	0.05 – 0.15
Manganese	0.30 – 0.60
Phosphorus	0.025 Max
Sulfur	0.025 Max
Silicon	0.50 Max
Chromium	1.90 – 2.60
Molybdenum	0.87 – 1.13

The chromium content improves scaling and oxidation resistance, while molybdenum enhances creep strength and high-temperature tensile performance.

Mechanical Properties of ASME SA335 P22 Pipe

ASTM A335 P22 Pipe offers reliable mechanical strength under cyclic thermal loading and sustained pressure environments.

Property	Value
Tensile Strength	415 MPa Min
Yield Strength	205 MPa Min
Elongation	30% Min

These properties make a335 p22 pipe suitable for pressure piping systems operating in elevated temperature conditions.

Heat Treatment of Chrome Moly Alloy ASTM A335 Pipe

A335 P22 pipe is supplied in the normalized and tempered condition to achieve the required mechanical properties and refined grain structure. Proper heat treatment enhances durability, dimensional stability, and long-term creep resistance.

Heat Treatment Methods:

Normalizing
Tempering
Post Weld Heat Treatment (PWHT) when required

PWHT is recommended for welded systems to maintain structural integrity in high-temperature service.

Dimensions & Size Range of ASTM A335 P22 Seamless Pipes

Outer Diameter: ½" NB to 24" NB
Wall Thickness: SCH 20, 40, 60, 80, 160, XXS
Length: Single Random, Double Random, Cut Length
Ends: Plain End, Beveled End

Custom sizes are available upon request as per project specifications.

Manufacturing Process of ASTM A335 P22 Alloy Steel Seamless Pipes

Our ASTM A335 P22 Pipe is manufactured using advanced production techniques to ensure dimensional accuracy and mechanical reliability:

Hot Rolling
Cold Drawing
Heat Treatment
Hydrostatic Testing
Ultrasonic Testing

Each pipe is supplied with a Mill Test Certificate (EN 10204 3.1), and third-party inspection can be arranged upon request. We maintain strict quality control to meet international standards and export requirements.

Applications of ASTM A335 P22 Pipe

ASTM A335 P22 alloy steel pipes are widely used in:

Power Generation Boilers
Superheaters & Reheaters
Heat Exchangers
Petrochemical Plants
Oil & Gas Refineries
High Temperature Piping Systems

The material performs efficiently in environments exceeding 500°C.

We supply ASTM A335 P22 Pipe to EPC contractors, boiler manufacturers, refinery projects, and industrial process plants globally, ensuring timely delivery and consistent quality.