ASTM A335 P5 Alloy Steel Seamless Pipes
Specification
ASTM A335 P5 is the standard specification for seamless ferritic alloy steel pipes manufactured from 5Cr-0.5Mo chromium-molybdenum steel, designed for high-temperature and high-pressure service.
This page provides a technical overview of ASTM A335 P5 alloy steel seamless pipes and offers a downloadable PDF specification for engineering, procurement, and EPC projects.
What is ASTM A335 P5?
ASTM A335 covers seamless alloy steel pipes for elevated-temperature service.
Grade P5 is a chromium-molybdenum alloy steel pipe grade selected for applications requiring:
ASTM A335 P5 pipes are widely used in power plants, refineries, petrochemical units, and high-temperature pressure systems.
ASTM A335 P5 Material
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Material grade: P5
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Alloy system: 5Cr-0.5Mo
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Product form: Seamless Pipe
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ASME equivalent: ASME SA335 P5
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ASME Tube grade: ASME SA213 T5
Chemical Composition – ASTM A335 P5 (%)
| Element | Composition Range |
|---|---|
| Carbon | 0.15 max |
| Manganese | 0.30–0.60 |
| Phosphorus (max) | 0.025 |
| Sulfur (max) | 0.025 |
| Silicon | 0.50 max |
| Chromium | 4.00–6.00 |
| Molybdenum | 0.45–0.65 |
| Others | … |
Mechanical Properties (Room Temperature)
| Heat Treat Type | Subcritical Annealing/Tempering Temperature (min/range) |
|---|---|
| Full or isothermal anneal
or normalize and temper |
1200–1300 °F [650–705 °C] |
Heat Treatment Requirements
ASTM A335 P5 seamless pipes shall be supplied in one of the following conditions, as specified in the purchase order:
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Annealed, or
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Normalized and Tempered (N&T)
Proper heat treatment ensures consistent mechanical performance and reliable service at elevated temperatures.
Hardness Limit
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Maximum hardness: 235 HB
Testing & Inspection
ASTM A335 P5 pipes are supplied with complete inspection and testing in accordance with ASTM standards:
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Chemical composition analysis
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Tensile test
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Flattening test
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Hydrostatic test or Eddy current test
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Dimensional inspection per ASTM A999
All products are supplied with EN 10204 3.1 Mill Test Certificate.
Size Range
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Outside Diameter: 1/8″ – 24″
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Wall Thickness: SCH 10 – SCH XXS
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Length: Random, Double Random, or Cut-to-Length
Typical Applications
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High-temperature pressure piping
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Power generation piping systems
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Petrochemical and refinery units
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Boilers and thermal processing equipment
Download ASTM A335 P5 Alloy Steel Seamless Pipes Specification PDF
📄 ASTM A335 P5 Alloy Steel Seamless Pipes – Technical PDF Datasheet
✔ Standard overview
✔ Chemical composition
✔ Mechanical properties
✔ Heat treatment
✔ Testing requirements
✔ Size range
✔ P5 vs T5 comparison
👉 [Download astm a335 p5 alloy steel seamless pipe specification PDF]