ASTM A335 Grade P5 Alloy Steel Seamless Pipe
Dec 03, 2025
ASTM A335 Grade P5 Alloy Steel Seamless Pipes description
ASTM A335 P5 is a U.S. standard ferritic alloy steel seamless pipe for high-temperature service, corresponding to the Chinese alloy steel grade 1Cr5Mo. It is suitable for working media such as water, steam, hydrogen, and sulfur-containing oil products. When used with steam, its maximum operating temperature is 650°C. For sulfur-containing oil products, it exhibits excellent resistance to high-temperature sulfur corrosion and is commonly used in environments with temperatures ranging from 288°C to 550°C.
ASTM A335 Grade 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 |
| 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 |
ASTM A335 P5 Alloy Steel Pipes in High-Sulfur Crude Oil Processing Units
Atmospheric/Vacuum Distillation Units
Bottom Piping: Used in atmospheric/vacuum tower bottoms.
Furnace Tubes: Applied in atmospheric/vacuum furnace tubes.
Transfer Lines: High-speed sections of atmospheric/vacuum transfer lines.
High-Temperature Sulfur-Containing Pipelines: Other high-temperature oil/gas pipelines.
Fluid Catalytic Cracking (FCC) Units
High-Temperature Slurry Piping: For catalyst and slurry recycling.
High-Temperature Sulfur-Containing Pipelines: Other oil/gas pipelines.
Delayed Coking Units
Coker Feed Piping: High-temperature feed lines at the coker bottom.
Coker Top Piping: High-temperature oil/gas lines at the coker top.
Coker Furnace Tubes: Used in coker furnace tubes.
Fractionator Bottom Piping: Applied in fractionator bottoms.
High-Temperature Sulfur-Containing Pipelines: Other oil/gas pipelines.
Test and inspection
Packaging and shipping
