YUHONG HOLDING GROUP CO., LTD
YUHONG HOLDING GROUP CO., LTD
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The ASTM A335 P22 High Frequency Welding (HFW) Fin Tube is manufactured by helically or longitudinally welding alloy fin strips onto a seamless P22 alloy steel base tube using high-frequency resistance welding. This finned tube is specifically designed for furnace and radiant coil applications, where high-temperature strength, pressure resistance, and thermal efficiency are crucial.
| 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 |
| 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 |
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 163 HB |
| 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) |
High Temperature Resistance: P22 material and high-chromium fin strip allow operation in up to 600–650°C.
Reliable Fin Bonding: HFW technology ensures strong metallurgical bond, minimizing thermal resistance and improving efficiency.
Oxidation and Scaling Resistance: Ideal for direct flame and high-flue gas environments.
Enhanced Heat Transfer: Fins increase surface area and promote turbulence, improving heat exchange rate inside the furnace.
Long Service Life: Resistant to thermal fatigue and corrosion, reducing maintenance frequency in demanding operations.
Power Plant Furnaces (Radiant Section)
Waste Heat Recovery Furnaces
Industrial Steam Generators
Petrochemical Process Heaters
Coal-Fired and Biomass-Fired Boilers
High-Pressure Radiator and Convection Coils
