HFW Fin Tube ASTM A335 P22 Alloy Steel Seamless Tube With 11-13CR Strip For Economizer
HFW Fin Tube ASTM A335 P22 Alloy Steel Seamless Tube With 11-13CR Strip For Economizer
Product Overview
This product is a High-Frequency Welded (HFW) fin tube made with ASTM A335 P22 alloy steel seamless base tube, combined with a serrated 11–13% Chromium (Cr) alloy fin strip. Designed for use in economizers, especially in high-temperature and high-pressure environments such as power stations and industrial boilers.
Chemical Composition
Base Tube – ASTM A335 P22
| 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 A335 P22
| 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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Excellent Thermal Conductivity: The HFW bonding ensures low contact resistance between tube and fin for efficient heat transfer.
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High-Temperature Resistance: Suitable for operation in elevated temperature environments due to the alloy composition.
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Oxidation & Corrosion Resistance: The 11-13Cr fin provides superior resistance to flue gas corrosion and scaling.
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Strong Weld Bond: High-frequency welding results in durable and consistent fin attachment, ideal for vibrating environments.
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Customizable Fin Geometry: Can be made with serrated or solid fins, and varied fin density, thickness, and height.
Applications
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Economizers in Power Plants
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Waste Heat Recovery Units (WHRU)
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Superheated Steam Boilers
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Process Heating Systems in Refineries
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Industrial Furnaces and Ovens
Get in Touch
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