HFW Fin Tube ASTM A213 T22 Alloy Steel Seamless Tube For Furnace And Heater
HFW Fin Tube ASTM A213 T22 Alloy Steel Seamless Tube For Furnace And Heater
Product Overview
The ASTM A213 T22 HFW Fin Tube is a high-temperature alloy steel tube with high frequency welded (HFW) fins, designed for use in industrial furnaces, heaters, and boilers. The T22 alloy offers superior thermal strength, oxidation resistance, and creep resistance, making it suitable for continuous operation under extreme heat and pressure.
Chemical Composition
Base Tube – ASTM A213 T22
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.05–0.15 |
| Manganese (Mn) | 0.30–0.60 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Chromium (Cr) | 1.90–2.60 |
| Molybdenum (Mo) | 0.87–1.13 |
Fin Material – 11-13Cr Strip
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 11.0–13.0 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
Mechanical Properties
Base Tube – ASTM A213 T22
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 163 HB |
Fin Material (Typical)
| Property | Value |
|---|---|
| Tensile Strength | Approx. 450–600 MPa |
| Yield Strength | Approx. 250–350 MPa |
| Hardness | 150–180 HB |
| Heat Resistance | Up to 600°C (continuous) |
Advantages
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Superior heat transfer performance for high-temperature gas environments.
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High mechanical strength and creep resistance for prolonged service at elevated temperatures.
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Excellent weldability and structural stability due to the seamless tube and HFW fin bonding.
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Corrosion and oxidation resistance ensures durability in aggressive heating environments.
Applications: Convection Section of the Furnace
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Located in the upper part of the furnace.
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This section recovers residual heat from flue gases after combustion.
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Flue gas temperature here is lower than in the radiant section (typically 300–700°C), making it ideal for finned tubes.
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The fins increase surface area, enhancing heat recovery efficiency.
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T22’s creep strength and oxidation resistance ensure reliable performance under long-term high-temperature operation.
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