ASME SA335 P9 Seamless Ferritic Alloy Steel Pipe For High Superheater and Boiler
ASME SA335 P9 Seamless Ferritic Alloy Steel Pipe For High Superheater and Boiler
With over 30 years of dedicated focus on industrial pipe manufacturing, YUHONG GROUP has established a mature production system for ASME SA335 P9 seamless ferritic alloy steel pipes for high-temperature service. Our state-of-the-art production facilities cover every crucial aspect, from electric-furnace smelting to seamless tube rolling and precise heat treatment. This enables us to meticulously control the chemical composition and mechanical properties of P9 alloy pipes.
Backed by our ASME certification, we strictly adhere to ASME SA335 throughout the entire production cycle, from the procurement of raw materials to final product delivery.
Chemical Requirements for Grade P9
| Grade | UNS Designation | Carbon, % | Manganese, % | Phosphorus, % | Sulfur, % | Silicon, % | Chromium, % | Molybdenum, % |
| P9 | K90941 | 0.15 max | 0.30 - 0.60 | 0.025 | 0.025 | 0.25 - 1.00 | 8.00 - 10.00 | 0.90 - 1.10 |
Heat Treatment Requirements for Grade P9
| Grade | Heat Treat Type | Subcritical Annealing or Tempering Temperature, min or range, °F [°C] |
| P9 | full or isothermal anneal, or normalize and temper, or subcritical anneal | 1250 [675] |
Pipe Testing Requirements Summary Table
| Test Category | Test Type |
| Hydrostatic Test | General for most grades |
| For P91 Type 1/2, P92, P911, P122 | |
| Nondestructive Examination (NDE) | General NDE |
| For specific grades (P91 Type 1/2, P92, P911, P122) | |
| For Grades P9 with Practice E213 | |
| Mechanical Tests | Tension Test (Longitudinal) |
| Flattening Test | |
| Bend Test | |
| Hardness Test |
Advantages in High-Temperature Service Applications
1. Material Properties Tailored for High-Temperature Conditions
Exceptional High-Temperature Strength
Superior Oxidation and Corrosion Resistance
2. Production and Quality Advantages: Ensure Safety
High Reliability of Seamless Process
Comprehensive Quality Control Throughout the Process
3. Facilitate Efficient and Economical Operation of Equipment
Optimized Heat Transfer Efficiency
Long Service Life and Low Comprehensive Cost
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