EN10217-7 1.4301 Extruded Finned Tubes With AL Fin For Wood Dryer
- Base Tube: EN10217-7 1.4301 (AISI 304) stainless steel, chosen for its excellent corrosion resistance and temperature stability—critical for wood dryer environments with high humidity and occasional chemical exposure.
- Fins: High-purity aluminum (1050/3003 series), selected for superior thermal conductivity to enhance heat transfer efficiency.
Chemical composition of 1.4301 stainless steel (per EN10217-7):
| Element |
Content Range |
Role in Performance |
| Chromium (Cr) |
18.0-20.0% |
Provides corrosion resistance |
| Nickel (Ni) |
8.0-11.0% |
Enhances ductility and oxidation resistance |
| Carbon (C) |
≤0.07% |
Controls strength and weldability |
| Manganese (Mn) |
≤2.0% |
Improves formability |
| Silicon (Si) |
≤1.0% |
Aids in oxidation resistance |
| Phosphorus (P) |
≤0.045% |
Minimized to avoid brittleness |
| Sulfur (S) |
≤0.015% |
Reduced to enhance corrosion resistance |
Engineered for the cyclic thermal stress of wood dryers, these tubes deliver robust mechanical performance:
| Property |
Value |
Benefit for Wood Dryers |
| Tensile Strength |
≥520 MPa |
Resists deformation under pressure |
| Yield Strength |
≥205 MPa |
Maintains shape during thermal cycling |
| Elongation (in 50mm) |
≥40% |
Accommodates expansion from heat |
| Maximum Operating Temp |
600°C (1112°F) |
Withstands high heat in dryer chambers |
Our extruded finned tubes use a precision cold extrusion process:
- Base Tube Preparation: 1.4301 stainless steel tubes are cleaned and precision-machined to ensure uniform outer diameter.
- Fin Extrusion: Aluminum fins are mechanically extruded onto the base tube using specialized dies, creating a seamless bond with <0.01mm gap—minimizing thermal resistance.
- Surface Treatment: Fins are deburred and tubes undergo passivation to enhance 1.4301’s natural corrosion resistance.
- Quality Testing: 100% inspection for fin adhesion, dimensional accuracy, and pressure resistance (tested at 2.5x working pressure).
- Heat Transfer Efficiency: The extrusion process ensures 99%+ contact between fins and base tube, boosting heat transfer by 35-45% compared to wrapped fins—critical for uniform wood drying (reducing drying time by 15-20% in tests).
- Ideal for Wood Dryers: Specifically designed for:
- Lumber dryers (hardwood/softwood)
- Plywood/particleboard drying lines
- Biomass-fueled or electric wood drying systems
- Resists moisture, sap residues, and mild acids from wood.
Superior Corrosion Resistance: 1.4301 stainless steel withstands humidity and wood-derived acids, eliminating rust issues common with carbon steel.
Uniform Heat Distribution: Extruded fins ensure consistent heat transfer across the tube surface, preventing uneven wood drying (e.g., warping, cracking).
Longevity: Aluminum fins resist oxidation; stainless steel base tube avoids pitting—service life ≥12 years in typical wood dryer operations.
Energy Efficiency: Reduced thermal resistance lowers energy consumption, cutting operational costs.
Q1: Can fin density be customized for different wood types?
A: Yes—we offer fin densities (fins per inch: 8-16) tailored to hardwood (slower drying) vs. softwood (faster drying) requirements.
Q2: Are these tubes compatible with high-humidity dryer environments?
A: Absolutely. 1.4301 stainless steel’s chromium content forms a protective oxide layer, resisting moisture-induced corrosion.
Q3: What tube sizes are available?
A: Standard outer diameters: 16mm-51mm; wall thickness: 1.5mm-3mm. Custom sizes available upon request.
With 20 years of export expertise, Yuhong ranks among China’s top 5 finned tube exporters, serving 80+ countries. Our 55 production lines, 110+ skilled workers, and 20,000㎡ facility—equipped with advanced extrusion and testing equipment—ensure compliance with global standards (EN, ASTM, DIN). We specialize in finned tubes, boiler tubes, and heat exchanger solutions, prioritizing quality, on-time delivery, and 24/7 technical support.
Contact Us
![]()
