Alloy Steel Pipe For High-temperature And High-pressure Applications
12cr1movg seamless pipe offers high-temperature strength and corrosion resistance for high-pressure boilers and petrochemical piping systems.
Alloy Steel Pipe For High-temperature And High-pressure Applications
12cr1movg seamless pipe offers high-temperature strength and corrosion resistance for high-pressure boilers and petrochemical piping systems.
12Cr1MoVG Seamless Pipe is a high-performance alloy steel pipe engineered for exceptional high-temperature strength, creep resistance, and corrosion resistance in demanding applications. Conforming to the Chinese GB/T 5310-2008 standard, this Chrome Moly Pipe is a low-alloy heat-resistant steel containing 0.90-1.20% chromium, 0.25-0.35% molybdenum, and 0.15-0.30% vanadium, making it ideal for boiler pipeline protection in power plants, steam turbines, petrochemical plants, and other industrial piping systems. Its seamless construction ensures superior durability and reliability under high-pressure and high-temperature conditions up to 580°C.
The 12Cr1MoVG Seamless Pipe is manufactured through hot-rolling or cold-drawing processes, followed by heat treatments such as normalizing at 980-1010°C and tempering at 720-760°C, or quenching and tempering with accelerated cooling, to achieve optimal mechanical properties. The chromium content enhances oxidation resistance, while molybdenum and vanadium improve creep resistance and thermal strength, making it suitable for boiler pipeline protection in superheater tubes, headers, and steam pipes. Available in sizes from 1/4” to 56” (DN6 to DN1422), with wall thicknesses ranging from 5mm to 50mm, and lengths up to 12.5 meters or customized, it meets diverse project requirements.
The Seamless Alloy Pipes undergo rigorous testing, including flattening, bending, expansion, microstructure examination, and hydrostatic tests, to ensure compliance with GB/T 5310 standards. With a minimum tensile strength of 490 MPa and yield strength of 245 MPa, the 12Cr1MoVG pipe offers excellent resistance to thermal stress and pressure, making it ideal for handling corrosive fluids and gases in power generation and petrochemical applications. Surface treatments such as black varnish, hot-dip galvanizing, or 3LPE coatings further enhance corrosion resistance, while plain, beveled, or threaded ends facilitate integration into industrial piping systems.
Compared to other grades like ASTM A335 P11 or P22, the 12Cr1MoVG Seamless Pipe offers superior thermal strength due to its vanadium content, with endurance strength at 580°C being 1.4 times that of 2.25Cr-1Mo steel, despite containing only half the alloy content. Its microstructure, typically ferrite plus pearlite or bainite, provides high plasticity under sustained tension, though it requires preheating to 300°C before welding to prevent cold cracking due to its carbon equivalent of 0.41-0.64. This makes it a preferred choice for high-pressure boiler components like superheaters and main steam pipes in power plants.
Engineered to address critical challenges like pipeline wear, corrosion, and thermal stress, the 12Cr1MoVG Seamless Pipe delivers unmatched performance in high-throughput industrial systems. Its advanced alloy composition, enhanced by vanadium for improved creep resistance, and seamless construction make it a reliable choice for engineers seeking durable industrial piping solutions for extreme high-temperature environments, ensuring safety, longevity, and efficiency in Chrome Moly Pipe applications.
Withstands temperatures up to 580°C for boilers and superheaters.
Chromium and coatings ensure durability in harsh environments.
Vanadium enhances durability in high-pressure systems.
Uniform construction ensures reliability in high-pressure applications.
Long lifespan reduces maintenance and replacement costs.
Ideal for power plants, petrochemicals, and boiler systems.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08-0.15 |
| Silicon (Si) | 0.17-0.37 |
| Manganese (Mn) | 0.40-0.70 |
| Phosphorus (P) | ≤0.030 |
| Sulfur (S) | ≤0.030 |
| Chromium (Cr) | 0.90-1.20 |
| Molybdenum (Mo) | 0.25-0.35 |
| Vanadium (V) | 0.15-0.30 |
| Property | Value |
|---|---|
| Tensile Strength, min (MPa) | 490 |
| Yield Strength, min (MPa) | 245 |
| Elongation, min (%) | 22 |
| Hardness, max (HBW) | 235 |
Used in high-temperature and high-pressure pipelines in power stations and petrochemical industries, known for excellent strength, heat resistance, and long-term service life.
Retains excellent mechanical strength and creep resistance at temperatures up to 580°C, ideal for superheater and header pipelines.
Good oxidation resistance in steam and combustion gas environments; chromium and molybdenum improve corrosion stability.
Commonly used for over 100,000 hours in stable high-temperature environments; minimizes downtime and maintenance costs.
Compatible with common welding methods; requires preheating and post-weld heat treatment to ensure long-term performance integrity.
Maintains structural integrity in high-pressure environments such as boiler tubes, reheaters, and steam headers.
Though highly heat-resistant, 12Cr1MoVG requires strict control during welding and operation in fluctuating thermal cycles to prevent creep cracking or embrittlement over time.
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