Alloy Steel Astm A335 P9 Alloy Pipe
ASTM A335 / ASME SA335 Grade P9 seamless alloy steel pipe engineered for high-pressure and elevated-temperature service, offering excellent creep strength, oxidation resistance, and durability for petrochemical, oil & gas, chemical, engineering, and power generation applications.
Product Overview
ASTM A335 P9 is a chromium-molybdenum alloy steel seamless pipe grade designed for high-pressure and high-temperature applications. The chromium content improves oxidation and corrosion resistance, while molybdenum enhances creep strength and mechanical stability at elevated temperatures.
Applications
- Petrochemical industry
- Chemical processing plants
- Oil and gas industry
- Engineering and industrial piping systems
- Power generation and boiler systems
Key Features
- Excellent creep strength at elevated temperatures
- High oxidation and corrosion resistance
- Smooth surface finish
- Available in a wide range of sizes, schedules, and forms
- Custom sizes and wall thicknesses available on request
Standards & Type
- Standards: ASTM A335, ASME SA335
- Type: Seamless
- Specialization: Large diameter sizes (as specified)
Size Range & Dimensions
- Nominal size: 1/8 NB to 24 NB
- Outside diameter: 19.05 mm – 114.3 mm
- Wall thickness: 2.0 mm – 14 mm
- Schedule range: Schedule 20 to Schedule XXS (heavier on request, up to 250 mm thickness as stated)
- Length options: Single Random, Double Random, Cut Length
- Maximum length: 16000 mm
Forms & Pipe Ends
- Forms: Round, Square, Rectangular, Hydraulic
- Ends: Plain End, Beveled End, Threaded
Packing & Delivery
- Individually wrapped by hand to protect surface quality
- Plywood cases or pallet packaging recommended for safe transport
- Suitable for sea and road transportation
Marking & Traceability
- Pipes marked with heat number, size, material grade, and part number
- Identification printed along the length of each supplied pipe
Chemical Composition (%)
| Element | Value |
|---|---|
| Carbon (C) | 0.015 max |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Silicon (Si) | 0.50 max |
| Chromium (Cr) | 4.00 – 6.00 |
| Molybdenum (Mo) | 0.45 – 0.65 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (min) | 415 MPa |
| Yield Strength (min) | 205 MPa |
| Elongation (min) | 30% |
