ASTM A335 P5
ASTM A335 P5 Alloy Steel Pipe Supplier in Tunisia
ASTM A335 P5 is a chromium-molybdenum alloy steel grade used for seamless pipes designed for high-temperature service. It is suitable for selected industrial applications where piping materials must meet specific mechanical, thermal and pressure requirements.
The ASTM A335/A335M specification covers seamless ferritic alloy-steel pipe intended for high-temperature applications. Grade P5 is used in selected refinery, petrochemical, power generation and process-industry systems, subject to the applicable design code and operating conditions.
Emirerri Steel supports industrial buyers sourcing ASTM A335 P5 alloy steel pipes according to required dimensions, technical specifications, inspection requirements and product availability.
Key Features
- Chromium-molybdenum alloy steel: Designed for specified industrial applications involving elevated temperatures.
- Seamless construction: Manufactured without a longitudinal weld seam.
- High-temperature service: Suitable for applications designed around the requirements of ASTM A335.
- Oxidation resistance: Chromium contributes to the material’s oxidation behaviour under suitable service conditions.
- Controlled mechanical properties: Requirements depend on the applicable standard, product condition and heat treatment.
- Material traceability: Testing and inspection documentation can be provided according to the purchase requirements.
Specifications
| Parameter | Description |
|---|---|
| Standard | ASTM A335/A335M |
| Grade | P5 |
| Material family | Ferritic chromium-molybdenum alloy steel |
| Product type | Seamless alloy steel pipe |
| Service category | High-temperature service |
| Outside diameter | As specified in the purchase order |
| Wall thickness | As specified by schedule or project requirements |
| Length | As specified in the order |
| End preparation | Plain, bevelled or as specified |
| Heat treatment | According to applicable specification requirements |
| Inspection | As required by the governing standard and purchase order |
| Certification | Material test certificate, subject to order requirements |
Dimensions, tolerances, heat treatment and inspection requirements must be confirmed against the applicable edition of ASTM A335/A335M and the purchase specification.
ASTM A335 P5 – Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 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 |
ASTM A335 P5 – Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa (60 ksi) Min. |
| Yield Strength | 205 MPa (30 ksi) Min. |
| Elongation | 30% Min. |
| Brinell Hardness | 197 HBW Max. |
ASTM A335 P5 – Physical Properties
| Property | Typical Value |
|---|---|
| Density | Approx. 7.75 g/cm³ |
| Melting Range | Approx. 1,425–1,510°C |
| Modulus of Elasticity | Approx. 210 GPa |
| Thermal Conductivity | Approx. 25–30 W/m·K |
| Specific Heat Capacity | Approx. 460–500 J/kg·K |
| Coefficient of Thermal Expansion | Approx. 11–12 × 10⁻⁶/°C |
| Magnetic Properties | Magnetic |
High-Temperature Performance
ASTM A335 P5 pipe is used in selected industrial systems where elevated-temperature performance is an important design consideration.
Material selection should account for:
- Design and operating temperatures
- Internal pressure and mechanical loading
- Process-fluid characteristics
- Thermal cycling and start-up conditions
- Welding and heat-treatment requirements
- Applicable piping codes and inspection criteria
The maximum allowable operating temperature must be determined using the applicable design code and engineering data. It cannot be established from the grade designation alone.
Applications
Oil and Gas
- Selected high-temperature process piping
- Refinery piping systems
- Industrial fluid-transfer applications approved for the grade
Power Generation
- Specified thermal-service piping
- Auxiliary piping systems
- Selected industrial steam applications
Petrochemical and Process Industries
- Process lines operating under defined thermal conditions
- Industrial heating systems
- Selected high-temperature service installations
The suitability of ASTM A335 P5 for any application must be confirmed against the operating conditions, corrosion environment and project design requirements.
Oxidation and Corrosion Resistance
The chromium content of ASTM A335 P5 contributes to its oxidation behaviour under certain elevated-temperature conditions. However, P5 is an alloy steel and should not be treated as a stainless steel grade.
Corrosion performance depends on the process fluid, temperature, moisture, pressure and operating environment. Where corrosion resistance is critical, material compatibility should be evaluated against the actual service conditions.
Welding and Fabrication
Welding and fabrication of ASTM A335 P5 pipe must follow qualified procedures and the applicable construction code.
Key considerations include:
- Qualified welding procedures, where required
- Compatible welding consumables
- Preheating according to the approved procedure
- Post-weld heat treatment, when required
- Non-destructive examination according to the governing code
- Material identification and traceability
Welding parameters should be established for the actual pipe dimensions, joint design, welding process and service requirements.
ASTM A335 P5 vs. P11 and P22
ASTM A335 P5, P11 and P22 are alloy-steel pipe grades intended for high-temperature service, but their compositions and properties differ.
ASTM A335 P5: Chromium-molybdenum alloy steel used in selected thermal and industrial applications.
ASTM A335 P11: A chromium-molybdenum grade with its own composition and mechanical-property requirements.
ASTM A335 P22: A chromium-molybdenum grade used in applications requiring its specific material properties at elevated temperatures.
Grade selection depends on the design code, temperature, pressure, process fluid and required mechanical properties. These grades should not be substituted for one another without engineering approval.
Quality Control and Certification
Depending on the applicable standard and purchase order, inspection and documentation may include:
Material test certificate
Chemical composition analysis
Mechanical testing
Dimensional inspection
Visual examination
Non-destructive testing, where required
Heat-treatment records, where applicable
Product marking and material traceability
The actual testing scope and documentation must be agreed with the manufacturer and specified in the purchase order.
Emirerri Steel – ASTM A335 P5 Alloy Steel Pipe Supplier
Emirerri Steel supports industrial buyers in the oil and gas, refining, petrochemical, power generation and process industries.
We can review enquiries for ASTM A335 P5 seamless alloy steel pipes based on required outside diameters, wall thicknesses, schedules, lengths, quantities, inspection requirements and delivery destinations.
Supply is subject to the agreed technical specification, manufacturer capability and availability. Other alloy steel pipe grades can also be considered where appropriate for the project.
Conclusion
ASTM A335 P5 is a seamless chromium-molybdenum alloy steel pipe grade intended for specified high-temperature applications. Proper selection requires verification of the applicable standard, design conditions, heat treatment and material documentation.
Contact Emirerri Steel to discuss your requirements for ASTM A335 P5 alloy steel pipes and other industrial piping materials.
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