What is p5 material specification
Feb 06, 2026
ASTM A335 P5 is a seamless chromium-molybdenum alloy steel tube suitable for high-temperature and corrosive environments. It is also known as P5 grade chromium-molybdenum tube. This steel tube is seamless and manufactured using hot rolling or cold drawing processes.
Supply range includes outer diameters from 1/2 inch to 36 inches (DN25 to DN900) and wall thicknesses up to SCH 160. It exhibits excellent oxidation resistance, creep strength, and long-term high-temperature structural stability. The chemical composition includes ≤0.15% carbon, 4.0~6.0% chromium, and 0.46~0.65% molybdenum, etc. The applicable standards include ASTM A335/SA335M.
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ASTM A335 Alloy Steel P5 Pipe Specification
| Standard | ASTM A335 P5, SA335 P5 (with IBR Test Certificate) |
|---|---|
| Size | 1/2" NB to 36" NB |
| Thickness | 3-12mm |
| Schedules | SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules |
| Tolerance | Cold drawn pipe: +/-0.1mm
Cold rolled pipe: +/-0.05mm |
| Craft | Cold rolled and Cold drawn |
| Type | Seamless / ERW / Welded / Fabricated |
| A335 P5 available in Form of | Round, Square, Rectangular, Hydraulic Etc. |
| Length | Standard Double & In Cut length also. |
| End | Plain End, Beveled End, Treaded |
| Specialized in | Large Diameter SA335 P5 |
| Additional Testing | NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc. |
| Application | Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service |
P5 Alloy Steel Seamless Pipes Chemical Composition
| Alloy Steel P5 | C | Cr | Mn | Mo | P | S | Si |
|---|---|---|---|---|---|---|---|
| 0.05 – 0.15 | 4.00 – 6.00 | 0.30 – 0.60 | 0.45 – 0.65 | 0.025 max | 0.025 max | 0.50 – 1.00 |
Alloy Steel P5 Pipe Mechanical Properties
| Tensile Strength, MPa | Yield Strength, MPa | Elongation |
|---|---|---|
| 415 min | 205 min | 30 min |
Characteristics of A335P5 Alloy Seamless Steel Pipe
Excellent High-Temperature Performance
The A335P5 alloy seamless steel pipe exhibits superior high-temperature strength and creep resistance, enabling it to operate stably over long periods in high-temperature environments. It also demonstrates outstanding oxidation resistance and corrosion resistance at elevated temperatures, effectively preventing oxidation and corrosion of the pipe material.
Strong Corrosion Resistance
The A335P5 alloy seamless steel pipe has excellent corrosion resistance, capable of withstanding the attack of various corrosive media such as acids, alkalis, and salts. In corrosive environments, its corrosion resistance is far superior to that of ordinary carbon steel pipes, ensuring long-term stable operation of the piping system.
Good Low-Temperature Performance
The A335P5 alloy seamless steel pipe maintains favorable mechanical properties and corrosion resistance even at low temperatures. It has a low ductile-to-brittle transition temperature, effectively preventing brittle fracture of the pipe material under cryogenic conditions.
Mature Manufacturing Process
The A335P5 alloy seamless steel pipe is produced using advanced smelting, rolling, and heat treatment technologies. During manufacturing, strict control is maintained over chemical composition and microstructure, ensuring that the pipe material meets relevant standards in terms of chemical composition, mechanical properties, and dimensional accuracy.
Applications of A335P5 Alloy Seamless Steel Pipe
Petrochemical Industry
The petrochemical industry imposes stringent requirements on piping materials, necessitating excellent resistance to high temperature, corrosion, and low temperature. The A335P5 alloy seamless steel pipe fully meets these demands and is widely used in pipeline systems within the petrochemical sector.
Power Generation Industry
The power generation industry also requires piping materials with exceptional high-temperature and corrosion resistance. As a high-performance piping material, A335P5 alloy seamless steel pipe is extensively applied in boiler and steam piping systems in power plants.
Aerospace Industry
The aerospace industry has even more rigorous material requirements, demanding outstanding performance in high-temperature, low-temperature, and corrosion resistance, along with excellent mechanical properties and dimensional precision. As a high-performance material, A335P5 alloy seamless steel pipe is widely used in hydraulic and pneumatic systems in aerospace applications.
Automotive Industry
The automotive industry also places strict demands on piping materials, requiring excellent high-temperature and corrosion resistance, good mechanical properties, and lightweight characteristics. As a high-performance piping material, A335P5 alloy seamless steel pipe is widely applied in fuel delivery and braking systems in vehicles.
A335 P5 Seamless Steel Pipe factory
