15CrMoG
High-quality 15CrMoG material, suitable for high-pressure environments.
12Cr5MoI seamless steel tube is a type of steel tubing that is made from the 12Cr5MoI alloy, which is a low-alloy high-strength structural steel. This type of steel is known for its excellent mechanical properties, including high strength, good toughness, and wear resistance.
12Cr5MoI is a type of low alloy heat-resistant steel, which is widely used in high-temperature applications due to its excellent mechanical properties, especially resistance to oxidation and corrosion at elevated temperatures. It’s primarily used in the manufacturing of components that operate under severe conditions, such as pressure vessels, boilers, and pipelines.
Seamless steel tubes are manufactured by a seamless process, which involves piercing a solid billet to create a hollow tube. This method ensures the absence of seams or welds in the tube, making it suitable for applications where a high level of integrity and strength is required.
The 12Cr5MoI seamless steel tube is commonly used in industries that require resistance to high-temperature and high-pressure conditions, such as in the manufacturing of boilers, superheaters, and pressure vessels. Its ability to withstand extreme conditions and its durability make it a preferred choice for these applications.
12Cr5MoI is a seamless steel tube that is annealed and used for processing petrochemical pipe fittings and connecting pipes of petroleum refineries. It is also used for petroleum cracking, sulfuric acid, and hydrochloric acid dew-point corrosion-resistant.
The chemical composition and mechanical properties of 12Cr5MoI steel are as follows:
The specific chemical composition of 12Cr5MoI steel is as follows:
| Element | Composition |
|---|---|
| Carbon (C) | Approximately 0.08% - 0.15% |
| Silicon (Si) | Maximum of 0.50% |
| Manganese (Mn) | Maximum of 0.50% |
| Phosphorus (P) | Maximum of 0.035% |
| Sulfur (S) | Maximum of 0.035% |
| Chromium (Cr) | Approximately 4.00% - 6.00% |
| Molybdenum (Mo) | Approximately 0.90% - 1.10% |
| Iron (Fe) | Balance (the remainder of the composition) |
The mechanical properties of 12Cr5MoI seamless steel tube are as follows:
| Property | Value |
|---|---|
| Tensile Strength | 410 megapascals (MPa) - 640 MPa |
| Yield Strength | Minimum of 265 MPa |
| Elongation | Minimum of 21% |
| Reduction of Area | Minimum of 50% |
| Hardness | Maximum of 197 HB (Brinell hardness) |
12Cr5MoI seamless steel tubes are primarily used in petroleum cracking and high-pressure chemical fertilizer equipment. They are suitable for conveying fluids at high temperatures and pressures.
12Cr5MoI alloy undergoes heat treatment processes like quenching and tempering to enhance its mechanical properties, including hardness, toughness, and ductility. This heat treatment is essential for preparing the alloy for high-performance applications under severe conditions.
12Cr5MoI can be welded, but it requires special precautions to avoid weld cracking due to its alloy composition. Preheating and post-weld heat treatment (PWHT) are often recommended to reduce residual stress and ensure the integrity of the welded joint. Machining requires appropriate tools and cooling techniques due to the material's hardness and strength.
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