ASTM A213 T92 Alloy Steel Seamless Tube for Heat Exchanger in Square Rectangular and Round Shapes
ASTM A213 T2 T5 T9 T11 T92 Alloy Steel Seamless Tube: Ferritic Alloy Seamless Steel Tube for Heat-Exchanger
Material
ASTM A213 T2, T5, T9, T11, and T92 are grades of ferritic alloy steel seamless tubes specifically designed for high-temperature service, particularly in heat exchangers, boilers, and other pressure vessels. These tubes are known for their excellent resistance to oxidation and corrosion, making them ideal for use in environments where high temperatures and pressures are prevalent.
Specification
ASTM A213 is the standard specification for seamless ferritic and austenitic alloy steel boiler, superheater, and heat-exchanger tubes. The specification covers several grades of ferritic alloy steel, each with unique properties tailored to specific applications. The tubes are manufactured using a seamless process and are subjected to various tests to ensure quality and performance.
Key Features
- High Temperature Resistance: Suitable for use in high-temperature environments.
- Corrosion Resistance: Excellent resistance to oxidation and corrosion.
- Durability: High strength and durability under pressure.
- Versatility: Available in various grades to suit different applications.
Chemical Composition
The chemical composition of these alloy steel grades is critical to their performance. Below is a table presenting the typical chemical composition for each grade:
| Element | T2 (%) | T5 (%) | T9 (%) | T11 (%) | T92 (%) |
|---|---|---|---|---|---|
| Carbon | 0.10-0.20 | 0.15 max | 0.15 max | 0.05-0.15 | 0.07-0.13 |
| Manganese | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
| Phosphorus | 0.025 max | 0.025 max | 0.025 max | 0.025 max | 0.02 max |
| Sulfur | 0.025 max | 0.025 max | 0.025 max | 0.025 max | 0.01 max |
| Silicon | 0.10-0.50 | 0.50 max | 0.25-1.00 | 0.50 max | 0.50 max |
| Chromium | 0.50-0.81 | 4.00-6.00 | 8.00-10.00 | 1.00-1.50 | 8.50-9.50 |
| Molybdenum | 0.44-0.65 | 0.45-0.65 | 0.90-1.10 | 0.44-0.65 | 0.30-0.60 |
| Vanadium | - | - | - | - | 0.15-0.25 |
| Nitrogen | - | - | - | - | 0.03-0.07 |
Mechanical Properties
The mechanical properties of these tubes are essential for their performance in high-pressure and high-temperature applications. Below is a table presenting the typical mechanical properties for each grade:
| Property | T2 | T5 | T9 | T11 | T92 |
|---|---|---|---|---|---|
| Tensile Strength (MPa) | 415 min | 415 min | 415 min | 415 min | 620 min |
| Yield Strength (MPa) | 205 min | 205 min | 205 min | 205 min | 440 min |
| Elongation (%) | 30 min | 30 min | 30 min | 30 min | 20 min |
Steel Grade
The specific steel grades covered under ASTM A213 include T2, T5, T9, T11, and T92. Each grade is designed to meet specific requirements for temperature and pressure, offering a range of options for different industrial applications.
Application
These alloy steel seamless tubes are primarily used in:
- Heat exchangers
- Boilers
- Superheaters
- Pressure vessels
- Petrochemical industries
- Power generation plants
Possible Alternative Grades
Depending on the specific requirements of the application, alternative grades to ASTM A213 T2, T5, T9, T11, and T92 may include:
- ASTM A335 P-series (P1, P5, P9, etc.)
- ASTM A209 T1
- ASTM A335 P91
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