Alloy Steel Seamless ASME SA335 P22 HFW Fin Tube With 11-13 CR Fin Strip
Alloy Steel Seamless Tube, ASME SA335 P22, HFW Fin Tube with 11-13 CR Fin Strip
Product Introduction
The ASME SA335 P22 High Frequency Welded (HFW) Fin Tube is manufactured from alloy steel seamless tubing with helically welded 11–13% chromium steel fins. This design ensures excellent heat transfer, corrosion resistance, and mechanical durability in high-temperature environments, such as furnaces, heaters, and economizers.
Chemical Composition
Base Tube – ASME SA335 P22 (Alloy Steel)
| Element | Content (%) |
|---|---|
| C | 0.05–0.15 |
| Mn | 0.30–0.60 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
| Si | 0.50–1.00 |
| Cr | 1.90–2.60 |
| Mo | 0.87–1.13 |
| Fe | Balance |
Fin Material – 11–13Cr Steel (Typical Composition)
| Element | Content (%) |
|---|---|
| Cr | 11.0–13.0 |
| C | ≤ 0.12 |
| Si | ≤ 1.0 |
| Mn | ≤ 1.0 |
| Fe | Balance |
Mechanical Properties (SA335 P22)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 192 HB |
| Working Temp Range | Up to 600–650°C |
Key Advantages
-
Excellent High-Temperature Strength
Suitable for continuous operation under high heat and pressure. -
Outstanding Oxidation & Sulfidation Resistance
Chromium-rich fin material resists scaling and chemical attack in furnace atmospheres. -
High Welding Integrity
HFW ensures tight fin attachment with low thermal contact resistance. -
Efficient Heat Transfer
The extended surface area improves convective heat exchange efficiency. -
Long Service Life
Withstands cyclic thermal stress and harsh flue gas exposure.
Typical Applications
Used in thermal and petrochemical industries, particularly in heat exchange equipment exposed to flue gases:
-
Furnace Convection Coils
-
Boiler Economizers
-
Superheaters and Reheaters
-
Heater Tubes in Refineries & Power Plants
-
Waste Heat Recovery Units (WHRU)
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