A335 P12 Seamless Ferritic Alloy Steel Pipe
A335 P12 is a ferritic chromium-molybdenum alloy seamless steel pipe under the ASME SA335 standard. Its core alloy ratio is "1Cr-0.5Mo," achieving excellent high-temperature resistance, creep resistance, and high-pressure resistance through the synergistic effect of chromium (Cr) and molybdenum (Mo). Its long-term service temperature can remain stable at ≤550℃, maintaining structural stability under high-temperature and high-pressure conditions. It is a core material for key equipment in the power, petrochemical, and other fields. Compared with ordinary carbon steel pipes, its carbon content is strictly controlled at 0.05-0.15%, ensuring good weldability while enhancing high-temperature strength through solid solution strengthening of alloying elements, effectively resisting corrosion from hydrogen sulfide, carbon dioxide, and other corrosive media.
Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of a335 p12 seamless ferritic alloy steel pipe in China, also supports customized service with low price. Welcome to wholesale discount a335 p12 seamless ferritic alloy steel pipe for sale here from our factory. Contact us for free sample.
ASTM A335 P12 is a chromium-aluminum alloy steel with strictly controlled chemical composition, including the content of elements such as carbon (C), silicon (Si), manganese (Mn), chromium (Cr), and molybdenum (Mo). A typical composition is: 0.05%-0.15% carbon, 0.80%-1.25% chromium, and 0.44%-0.65% molybdenum, with trace amounts of phosphorus, sulfur, and other impurities. This composition allows it to maintain high tensile strength (≥415MPa) and yield strength (≥205MPa) at high temperatures, with an elongation of not less than 30%.
The core advantage of this material lies in its heat resistance. The addition of chromium forms a dense chromium oxide protective layer on the steel pipe surface, effectively resisting corrosive media such as hydrogen sulfide and carbon dioxide.
The addition of molybdenum significantly improves the material's creep resistance, enabling it to operate stably for extended periods at temperatures up to 593℃. Furthermore, P12 steel exhibits excellent weldability; appropriate preheating and post-weld heat treatment can prevent cold cracking.
GNEE Group is a leading manufacturer and supplier of A335 P12 chromium-molybdenum alloy pipes. We are equipped with the latest eddy current testing and hydrostatic testing equipment to ensure the quality of every pipe. Material certificates are provided with each pipe upon delivery. Contact us for high-quality A335 P12 high-temperature and high-pressure alloy pipes for your power plants, oil refineries, and chemical plants.
A335 P12 boiler tube for high temperature service chemical composition
| Composition | Content |
| C | 0.05 - 0.15% |
| Mn | 0.30 - 0.60% |
| P | ≤0.025% |
| S | ≤0.025% |
| Si | 0.50 - 1.00% |
| Cr | 0.80 - 1.25% |
| Mo | 0.44 - 0.65% |
A335 P12 High Pressure Alloy Steel Seamless Pipe Mechanical properties
| Mechanical properties | Require |
| Tensile strength | ≥415MPa |
| Yield strength | ≥205MPa |
| Elongation | ≥30% |
| Impact test temperature | Unless otherwise specified (generally determined based on the actual usage environment). |
| Impact power | Unless otherwise specified (requires assessment based on specific operating conditions) |
Tensile strength determines a material's ability to resist fracture during stretching. A tensile strength of ≥415MPa for P12 material indicates that it can withstand significant tensile forces. Yield strength reflects the stress at which a material begins to undergo significant plastic deformation. A yield strength of ≥205MPa ensures that the pipe will not undergo premature plastic deformation when subjected to certain pressure. Elongation ≥30% reflects the material's plasticity, enabling the pipe to withstand a certain degree of deformation without breaking during processing and use.
Analysis of Main Application Areas and Specific Application Cases of ASTM/ASME SA335 Standard P12 High-Pressure Alloy Seamless Steel Pipes:
Power Industry: Widely used in high-temperature components such as boiler superheaters and reheaters in thermal power plants. For example, a large thermal power plant uses P12 seamless steel pipes as superheater piping, which operate stably for extended periods under high temperature and high pressure steam conditions of 500℃-550℃. Its excellent high-temperature resistance and creep resistance effectively ensure the power plant's efficient and stable power generation.
Petrochemical Industry: Suitable for high-temperature and high-pressure pipeline systems in petroleum refining and chemical synthesis plants. For example, a large oil refinery's hydrocracking unit uses P12 seamless steel pipes to transport high-temperature, high-pressure hydrogen and oil products. Its good corrosion resistance and high strength ensure the safe and long-term operation of the unit, reducing pipeline maintenance and replacement costs.
GNEE Service
Core Production Equipment
- Equipped with EAF+LF+VD triple smelting equipment to ensure precise control of alloy composition;
- Features a two-stage controlled rolling production line with a final rolling temperature stable at 880±20℃;
- Possesses a dedicated heat treatment furnace with normalizing at 900-930℃ and tempering at 680-730℃, controlling temperature fluctuations within ±5℃;
- Also equipped with a plate rolling machine with a rated capacity of not less than 30mm and a crane with a lifting capacity of ≥20 tons, among other forming and processing equipment.
Professional Inspection and Testing Capabilities
- Has an independent testing laboratory equipped with a full set of testing instruments, including a spectrometer, ultrasonic flaw detector (UT), and radiographic testing (RT);
- Has 3 intermediate-level RT and UT testing personnel, and the non-destructive testing personnel hold intermediate-level qualification certificates;
- Enables full-process testing from raw material intake to finished product output, including smelting analysis, heat treatment curve recording, 100% eddy current testing, and hydraulic testing, and can provide third-party testing certificates (such as SGS).
A335 P12 Chrome Moly Seamless Steel Pipe Factory
A335 P12 Seamless Ferritic Alloy Steel Pipe Packaging and shipping
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