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Custom-Profile Enhanced Surface Aluminum Rolling Blades
Precision-engineered rolling blades for producing advanced T-fin and Y-fin enhanced surface aluminum tubes with superior heat transfer coefficients.
- Enhanced Geometry Options:
- T-Fin, Y-Fin, Cross-Hatched & Spirally Fluted Micro-Structures
- Applicable Standards:
- ASTM B221, ASTM B234, ASTM A1012 / ASME SA1012, DIN 28180
- Forming Precision:
- ±0.005mm (±0.0002" Ultra-Precision Profile)
- Blade Metallurgy:
- Nano-Grain Tungsten Carbide Inserts / HSS M2 Matrix Steel
- Surface Finish & Polish:
- Si-Doped PVD Coating | Anti-Galling Mirror Polish (Ra < 0.08 μm)
- Material Compatibility:
- High-Ductility Aluminum Alloys (1050, 1060, 1100, 3003, 5052)
Applicable StandardsASTM / ASME B359, SB359, B111, B444, DIN EN 12451
Tooling Material GradesCr12MoV, D2, SKD11, High-Speed Steel M2, Carbide
Precision Tolerance±0.005 mm (±0.0002 in) Ground Finish
Compatible TubingCopper (C70600, C71500), Stainless Steel, Aluminum
Technical Specifications
Engineering for Nucleate Boiling
T-profile fins work by trapping tiny amounts of vapor in the tunnels between fins, which acts as a seed for bubble formation. Nexmek's rolling blades are designed to fold the fin tips with absolute consistency, creating the exact cavity geometry required to promote rapid bubble growth and expulsion, even at low temperature differences.
- Significant reduction in energy consumption for centrifugal chillers
- Higher heat flux in compact footprints for Al 1060 and 3003 alloys
- Engineered for low-GWP refrigerants compliant with ASTM A1012
Enhanced Profile Performance Matrix
A technical overview of how different aluminum fin geometries impact overall thermal duty.
| Profile Geometry | Surface Area Ratio | Boiling Efficiency (HTC) | Typical FPI Range & Standard |
|---|---|---|---|
| Standard Integral Fin | 3x - 5x Baseline | Baseline HTC (1.0x) | 19 - 26 FPI (ASTM B221) |
| Advanced Y-Profile | 7x - 9x Area | 2.8x Higher HTC | 26 - 32 FPI (ASTM B234) |
| Precision T-Profile | 10x - 14x+ Effective | 4.5x Higher HTC | Up to 40 FPI (ASTM A1012) |
Precision Folding and Material Health
The complex folding required for T-fins can stress the base aluminum. Nexmek's proprietary 'Progressive-Fold' technology utilizes a series of rolling discs that gradually shape the fin, preventing work-hardening cracks and ensuring the final tube maintains full mechanical integrity and pressure-bearing capability over its entire service life.