ASTM A335 P5 Alloy Steel Pipes Manufacturer, Supplier & Distributor in India, Turkey, Nigeria, & USA
High-Performance P5 Alloy Steel Pipes for High-Temperature Applications
Mcneil Instrument is a premier ASTM A335 P5 Alloy Steel Pipes Manufacturer, Supplier & Exporter in India, USA, Turkey & Nigeria, delivering high-performance seamless ferritic alloy steel pipes designed for elevated-temperature service, petroleum refining, chemical processing, power generation, and heavy industrial applications.
ASTM A335 Grade P5 (ASME SA335 Grade P5) is a 5% Chromium – 0.5% Molybdenum (5Cr–½Mo) seamless alloy steel pipe grade engineered to provide exceptional high-temperature creep strength and resistance to hot-oil corrosion and scaling. The 5% chromium addition offers enhanced protection against hydrogen attack, sulfur-bearing hydrocarbon streams, and hot-steam oxidation compared to lower-alloy grades such as P11 or P22.
Mcneil Instrument manufactures and supplies P5 seamless chrome moly pipes in a full range of nominal pipe sizes (NPS), schedules, wall thicknesses, and custom cut lengths governed by ASME B36.10M. All P5 pipes are supplied in normalized and tempered or fully annealed conditions to ensure structural integrity and mechanical stability under sustained high-temperature loading.
Global Supply Markets
We supply ASTM A335 P5 Alloy Steel Pipes for industrial requirements in:
- India
- USA
- Turkey
- Nigeria
- Middle East
- Europe
- Africa
- Other international markets
Whether you require ASTM A335 P5 Seamless Pipes for a refinery project in India, a power plant in the USA, a petrochemical facility in Turkey, or an oil & gas project in Nigeria, Mcneil Instruments can support your procurement requirements with specification-based supply and international export assistance.
Technical Specification of P5 Alloy Steel Pipes
| Parameter | Specification |
|---|---|
| Composition | Chromium 4–6%, Molybdenum 0.45–0.65% |
| Temperature Range | Up to 600°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 85 HRB |
| Standards | ASTM A335 / ASME SA335 |
What is ASTM A335 P5 Alloy Steel Pipe?
ASTM A335 P5 Alloy Steel Pipe is a seamless ferritic chromium-molybdenum alloy steel pipe developed for high-temperature service. The addition of chromium improves resistance to oxidation and scaling, while molybdenum contributes to high-temperature strength and creep resistance.
The material is particularly suitable for piping systems exposed to elevated temperatures, pressure and demanding process conditions.
P5 Alloy Steel Pipes are commonly specified for:
- High-temperature process piping
- High-pressure steam systems
- Refineries
- Petrochemical processing
- Thermal power plants
- Boilers and superheaters
- Heat exchanger systems
- Chemical processing facilities
- Fertilizer plants
Mcneil Instrument supplies ASTM A335 P5 Seamless Pipes for domestic and international industrial projects requiring dependable alloy steel piping solutions.
Key Features of ASTM A335 P5 Alloy Steel Pipes
Excellent High-Temperature Strength
Maintains mechanical stability and performance under elevated temperatures.
Superior Oxidation Resistance
Chromium content provides protection against oxidation and scaling.
Enhanced Creep Resistance
Designed for long-term operation in high-temperature environments.
Good Corrosion Resistance
Suitable for demanding industrial applications exposed to harsh operating conditions.
Excellent Weldability
Can be easily fabricated and installed across industrial projects.
Long Service Life
Offers reliable performance with reduced maintenance requirements.
ASTM A335 P5 Pipe Specifications
ASTM A335 P5 Alloy Steel Pipe Specifications
| Parameter | Specification |
|---|---|
| Standard | ASTM A335 / ASME SA335 |
| Grade | P5 |
| Material | Chromium-Molybdenum Alloy Steel |
| Pipe Type | Seamless |
| Chromium | 4.00–6.00% |
| Molybdenum | 0.45–0.65% |
| Size Range | 1/8″ NB to 36″ NB |
| Wall Thickness | SCH 10 to SCH XXS |
| Length | Single Random, Double Random & Custom Length |
| End Finish | Plain End, Beveled End & Threaded |
| Certification | EN 10204 3.1 / MTC |
Chemical Composition of ASTM A335 P5 Pipes
The chemical composition of ASTM A335 Grade P5 Alloy Steel Pipes provides the chromium and molybdenum levels required for elevated-temperature industrial service.
| 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 |
Chromium contributes to oxidation and scaling resistance, while molybdenum enhances high-temperature mechanical performance.
Mechanical Properties of ASTM A335 P5 Pipes
| Property | Value |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 22% |
| Impact Energy | ≥ 35 J |
| Hardness | ≤ 187 HB |
Manufacturing Process of Alloy Steel P5 Pipes
Mcneil Instrument’s reference material describes a controlled manufacturing sequence involving forming, welding where applicable, heat treatment, pickling, cold drawing for tight dimensional requirements, finishing and quality assurance.
1. Raw Material Inspection & Forming
High-grade alloy steel material is inspected for chemical composition and dimensional quality before processing. Controlled forming operations are used to achieve the required tubular dimensions.
2. Heat Treatment
Heat treatment is performed to achieve the required metallurgical properties and relieve stresses introduced during manufacturing. Temperature control is maintained throughout the process.
3. Pickling & Surface Cleaning
Following heat treatment, pipes can undergo cleaning and pickling to remove surface scale and contaminants, producing a clean surface suitable for subsequent inspection and finishing.
4. Cold Drawing for Precision Requirements
Where tight dimensional tolerances or non-standard dimensions are required, cold drawing can be used. The process improves dimensional accuracy and enables precise control of outside diameter and wall thickness.
5. Finishing & Straightening
Final finishing operations include cleaning, heat treatment where required, straightening and dimensional inspection.
6. Marking & Traceability
Pipes are marked with relevant information such as material grade, size and heat number. Material documentation and inspection records can be supplied according to project requirements.
Frequently Asked Questions – P5 Alloy Steel Pipes
What is ASTM A335 P5 Alloy Steel Pipe?
ASTM A335 P5 Alloy Steel Pipe is a seamless chromium-molybdenum alloy steel pipe designed for high-temperature and high-pressure service. It is commonly used in refineries, petrochemical plants, power generation facilities, boilers, heat exchangers, and process piping systems.
What is the chemical composition of ASTM A335 P5 Pipes?
ASTM A335 P5 typically contains approximately 4–6% Chromium and 0.44–0.65% Molybdenum, along with carbon, manganese, silicon and other elements within the applicable specification limits. Chromium provides oxidation and corrosion resistance, while molybdenum improves high-temperature strength.
What are the applications of P5 Alloy Steel Pipes?
P5 pipes are commonly used in oil & gas refineries, petrochemical plants, thermal power plants, boilers, heat exchangers, fertilizer plants, chemical processing facilities, and high-temperature steam and process piping systems.
Is ASTM A335 P5 Pipe seamless?
Yes. ASTM A335 P5 Pipes are specified as seamless alloy steel pipes, making them suitable for demanding high-temperature and high-pressure applications where reliable structural integrity is required.
What is the difference between ASTM A335 P5 and P9 Pipes?
Both P5 and P9 are chromium-molybdenum alloy steel grades used for elevated-temperature applications. P5 generally contains around 5% chromium, while P9 contains approximately 9% chromium. The higher chromium content of P9 provides greater oxidation and corrosion resistance for certain service conditions.
What sizes and schedules are available for ASTM A335 P5 Pipes?
ASTM A335 P5 pipes are available in a wide range of nominal pipe sizes, schedules, wall thicknesses and lengths. Mcneil Instruments can supply standard sizes as well as project-specific dimensions and cut lengths, subject to requirements and availability.
Does Mcneil Instruments export ASTM A335 P5 Alloy Steel Pipes?
Yes. Mcneil Instruments supplies and exports ASTM A335 P5 Alloy Steel Pipes from India to international markets including the USA, Turkey, Nigeria, Middle East, Africa and other global destinations, with export packaging and documentation support.






