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ASTM A312 310S Seamless SS Stainless Steel Tube
Material
ASTM A312 310S is a high-alloy austenitic stainless steel tube known for its excellent high-temperature strength and oxidation resistance. It is commonly used in applications that require resistance to heat and corrosion.
Specification
The ASTM A312 specification covers seamless and welded austenitic stainless steel pipes intended for high-temperature service. The 310S grade is specifically designed to withstand elevated temperatures and is often used in industrial applications.
Key Features
High-Temperature Resistance: Suitable for applications up to 1100°C (2012°F).
Corrosion Resistance: Excellent resistance to oxidation and sulfidation.
Good Fabricability: Easily welded and formed.
Strength: Maintains strength at high temperatures.
Chemical Composition
| Element | Composition (%) |
| 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) | 24.00 - 26.00 |
| Nickel (Ni) | 19.00 - 22.00 |
| Nitrogen (N) | 0.10 - 0.20 |
Mechanical Properties
| Property | Value |
| Yield Strength (MPa) | 205 |
| Tensile Strength (MPa) | 515 |
| Elongation (%) | 40 |
| Hardness (HB) | 201 |
Physical Properties
| Property | Value |
| Density (g/cm³) | 7.93 |
| 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 | Excellent |
| Heat Treatment | Solution Annealing |
Steel Grade
The ASTM A312 310S is categorized under the austenitic stainless steel grades, specifically designed for high-temperature applications.
Application
The ASTM A312 310S seamless stainless steel tube is widely used in various industries, including:
Power Generation: Used in heat exchangers, boilers, and superheaters.
Chemical Processing: Ideal for handling corrosive chemicals at elevated temperatures.
Oil and Gas: Utilized in pipelines and equipment that operate under high temperatures and pressures.
Aerospace: Employed in components that require high strength and resistance to oxidation.
Possible Alternative Grades
ASTM A312 304: A more common grade with good corrosion resistance but lower temperature tolerance.
ASTM A312 316: Offers better corrosion resistance than 304, suitable for marine environments.
ASTM A213 TP321: A stabilized grade for high-temperature applications with better resistance to intergranular corrosion.
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