ASME SA335 P9 Seamless Ferritic Alloy Steel Pipe for High Temperature Service
YUHONG GROUP is a specialized manufacturer of high-grade alloy steel pipes with over 30 years of experience in serving global energy and petrochemical industries. Our ASME SA335 P9 Seamless Ferritic Alloy Steel Pipes are engineered for critical high-temperature applications, manufactured under strict quality control with full compliance to ASME and ASTM standards.
Heat Treatment Specifications for ASME SA335 P9 Alloy Steel Pipe
| Parameter | Requirement | Notes |
| Grade | P9 (9Cr-1Mo) | Ferritic alloy steel |
| Heat Treat Type | Normalize and Temper | Mandatory process |
| Normalizing Temperature | 1900-1975°F (1040-1080°C) | Austenitizing range |
| Cooling Media | Air cooling | No forced cooling required |
| Tempering Temperature | 1100°F min (595°C) | Subcritical annealing |
| Microstructure | Tempered martensite | Post-treatment verification |
Chemical Composition Requirements for ASME SA335 P9 Alloy Steel Pipe
| Element | UNS K90941 | Requirement (%) | Notes |
| Carbon (C) | 0.15 | Max | - |
| Manganese (Mn) | 0.30-0.60 | Range | - |
| Phosphorus (P) | 0.025 | Max | - |
| Sulfur (S) | 0.025 | Max | - |
| Silicon (Si) | 0.25-1.00 | Range | - |
| Chromium (Cr) | 8.00-10.00 | Range | Key alloy element |
| Molybdenum (Mo) | 0.90-1.10 | Range | Key alloy element |
Mechanical Properties of ASME SA335 P9 Alloy Steel Pipe
| Property | Requirement | Unit | Notes |
| Tensile Strength (min) | 60 | ksi | Equivalent to 415 MPa |
| Yield Strength (min) | 30 | ksi | Equivalent to 205 MPa |
| Material Grade | P9 (Other Category) | - | 9Cr-1Mo Alloy Steel |
Applications of ASME SA335 P9 Alloy Steel Pipe
1.High-Temperature Pressure Systems
Steam piping networks in power plants
Process piping for refineries and petrochemical facilities
2.General Industrial Services
Medium-temperature heat exchangers
Utility piping system
Advantages of ASME SA335 P9 Alloy Steel Pipe
| Benefit | Technical Superiority |
| Standard Compliance | Meets minimum tensile and yield requirements per ASME SA335 |
| Reliable Performance | Proven mechanical properties for non-critical elevated temperature services |
| Material Flexibility | Suitable for applications not requiring advanced alloy grades |
| Cost-Effective | Economical alternative where ultra-high strength is unnecessary |
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ASME SA335 P9 Seamless Ferritic Alloy Steel Pipe for High Temperature Service Images
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