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A312 TP321 Seamless Stainless Steel Tube
Material
A312 TP321 is a type of austenitic stainless steel tube that is primarily used in high-temperature applications. It is known for its excellent resistance to corrosion and oxidation, making it suitable for various industrial applications. The addition of titanium in its composition helps stabilize the structure, preventing carbide precipitation during welding.
Specification
A312 TP321 is manufactured according to the ASTM A312/A312M standard, which specifies the requirements for seamless and welded austenitic stainless steel pipes. The tube is available in various sizes and thicknesses, catering to different industrial needs.
Key Features
Corrosion Resistance: TP321 exhibits excellent resistance to a wide range of corrosive environments, including sulfuric and phosphoric acids.
High-Temperature Stability: The titanium content enhances the material's stability at elevated temperatures, making it suitable for applications up to 900°C (1650°F).
Weldability: The alloy can be easily welded using standard welding techniques, and it maintains its mechanical properties post-welding.
Ductility: TP321 offers good ductility, allowing for easy fabrication and forming.
Chemical Composition
| Element | Percentage (%) |
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 17.0 - 19.0 |
| Nickel (Ni) | 9.0 - 12.0 |
| Titanium (Ti) | 5 x C min - 0.70 max |
Mechanical Properties
| Property | Value |
| Yield Strength (MPa) | 205 |
| Tensile Strength (MPa) | 515 |
| Elongation (%) | 40 |
| Hardness (Rockwell B) | 70 max |
Physical Properties
| Property | Value |
| Density (g/cm³) | 8.0 |
| Melting Point (°C) | 1400 - 1450 |
| Thermal Conductivity (W/m·K) | 16.2 |
| Specific Heat (J/kg·K) | 500 |
Process Performance
| Process | Performance |
| Welding | Good |
| Machining | Moderate |
| Forming | Good |
| Heat Treatment | Solution Annealing |
Steel Grade
A312 TP321 is classified as a high-performance stainless steel grade. The addition of titanium helps to stabilize the structure against sensitization, which can occur during welding. This makes TP321 particularly advantageous in applications where welding is required, as it minimizes the risk of intergranular corrosion.
Application
A312 TP321 seamless stainless steel tubes are widely used in various industries, including:
Aerospace: For exhaust systems and other high-temperature applications.
Chemical Processing: In reactors, heat exchangers, and piping systems.
Oil and Gas: For pipelines and equipment exposed to corrosive environments.
Power Generation: In steam lines and other high-temperature applications.
Possible Alternative Grades
While A312 TP321 is a popular choice, there are alternative grades that may be considered based on specific requirements:
A312 TP304: Offers good corrosion resistance but is less stable at high temperatures.
A312 TP316: Provides better corrosion resistance in chloride environments but may not perform as well at high temperatures.
A312 TP347: Similar to TP321 but with added niobium for enhanced high-temperature stability.
We constantly improve the stability of finished High Quality and Low Price 1 Inch ASTM A312 Tp 316L 1.4462 Duplex Stainless Steel Pipe / ... production and the speed and capability of new product development. We abide by and respect the laws and culture of our location, and actively repay society while developing our business. Low cost, high quality, customized products and services are the advantages of our customized production model.
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