Introduction
The ASTM A335 P5 alloy steel pipe, commonly known as Chrome Moly pipe, is designed for high-temperature service in industries such as power generation, petrochemicals, and refineries. Made from seamless ferritic alloy steel, it offers excellent mechanical performance under pressure and elevated temperatures.
Mcneil Instrument is a leading manufacturer, supplier, and exporter of ASTM A335 P5 alloy steel pipes in India. We are committed to delivering reliable, high-quality products that meet stringent international standards.
Unpacking ASTM A335 P5: The “Chrome Moly” Advantage
ASTM A335 P5 specifies seamless ferritic alloy-steel tubes for high-temperature service. The “Chrome Moly” name comes from its chemical composition.
- Chromium (Cr) enhances oxidation resistance and boosts tensile strength, yield strength, and hardness at room temperature.
- Molybdenum (Mo) improves high-temperature strength, wear resistance, and creep performance, while also inhibiting pitting corrosion.
These elements allow P5 alloy steel pipe to withstand harsh environments and mechanical stress.
Technical Specifications & Properties of ASTM A335 P5 Alloy Steel Pipe
ASTM A335 P5 Specifications
| Property | Specification |
| Standard | ASTM A335 / ASME SA-335 P5 |
| Alloy Type | Cr-Mo steel |
| Seamless Pipe | Mandatory under standard |
P5 Pipe Chemical Composition
| Element | Min (%) | Max (%) |
| C | 0.05 | 0.15 |
| Mn | — | 1.00 |
| P | — | 0.025 |
| S | — | 0.010 |
| Si | — | 0.50 |
| Cr | 0.45 | 0.65 |
| Mo | 0.44 | 0.65 |
ASTM A335 P5 Mechanical Properties
| Property | Minimum Value |
| Tensile Strength | 415 MPa |
| Yield Strength | 205 MPa |
| Elongation (50 mm) | 22% |
| Hardness | HRB 80–100 |
P5 Pipe Dimensions & Wall Thickness
| Nominal Size | OD (mm) | SCH 40 (mm) | SCH 80 (mm) |
| 1″ | 33.4 | 3.38 | 4.55 |
| 2″ | 60.3 | 3.91 | 5.54 |
| 4″ | 114.3 | 6.02 | 8.56 |
P5 Pipe Heat Treatment
| Treatment | Temperature | Purpose |
| Normalizing | 890–945 °C | Refines grain structure |
| Tempering | 700–760 °C | Improves toughness |
ASTM A335 P5 Hardness
| Condition | HRB Max |
| As-fired / Heat-treated | 100 |
Mcneil Instrument: Your Global Partner for ASTM A335 P5 Pipes
As a trusted manufacturer, supplier, and exporter of ASTM A335 P5 pipes, Mcneil Instrument delivers:
- Advanced manufacturing facilities following ASTM and ASME SA-335 standards
- Comprehensive inventory of SCH 40, SCH 80, SCH 160, and XXS in multiple lengths
- Export-ready logistics with seamless documentation for global markets
- Quality assurance through Mill Test Certificates (MTCs), IBR approval, and optional NACE testing
- Technical support for product selection and custom solutions, backed by competitive pricing
Conclusion
ASTM A335 P5 alloy steel pipes are essential for high-temperature and high-pressure applications, offering durability in demanding environments. Choosing a trusted partner like Mcneil Instrument ensures compliance, performance, and longevity of your piping systems.
Connect with Mcneil Instrument today to source high-quality ASTM A335 P5 pipes tailored to your industrial needs.
