High-Strength Externally Galvanized Aluminum Tubes
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High-Strength Externally Galvanized Aluminum Tubes

Engineered for harsh industrial environments, our High-Strength Externally Galvanized Aluminum Tubes combine the lightweight advantage of aluminum with the corrosion resistance of galvanized coating, delivering superior performance in abrasive and wet conditions.
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Product Description


Overview


Crafted from 7003-T6/6061-T6 aluminum, these tubes feature external zinc galvanization, precision grinding, and high tensile strength, ideal for heavy machinery, construction, and marine applications.


Features


Dual-Layer Protection

Galvanized Coating: 80μm zinc layer (ASTM A153) on external surface, passing 2000h salt spray test (ASTM B117) with zero red rust, 3x more durable than standard anodized tubes in coastal areas.

Base Alloy:

7003-T6 (yield 345 MPa): High-strength for heavy loads (e.g., mining equipment, bridge supports).

6061-T6 (yield 276 MPa): Balances strength and weldability for medium-duty applications (e.g., conveyor frames, scaffolding).


Precision Grinding & Machining

Surface Finish: Ground external surface (Ra ≤1.6μm) for reduced friction in sliding applications (e.g., linear guides, hydraulic cylinders).

Dimensional Accuracy: OD tolerance ±0.05mm, straightness ≤0.3mm/m, ensuring precise fit with bearings and bushings (ISO 4379 compliant).


Structural Performance

Load Capacity: Supports axial loads up to 100kN (7003-T6, wall thickness 15mm), validated by 1.5x safety factor testing (EN 1999-1-1 Eurocode 9).

Temperature Resistance: Operational from -50°C to 150°C, maintaining 90% strength at elevated temperatures (tested per ISO 6892-1).


Installation & Maintenance

Weldability: Galvanized layer pre-treated for TIG/MIG welding (ISO 3834-2 certified), with anti-spatter coating reducing post-weld cleanup time by 50%.

Low Corrosion Risk: Internal aluminum surface remains uncoated for optimal heat dissipation, while external galvanization protects against atmospheric corrosion.


Application


Heavy Machinery: Hydraulic cylinders, excavator arms, and mining conveyor rollers, resisting abrasion and moisture in underground environments.

Marine Equipment: Offshore platform supports, ship ladders, and dock rails, compliant with IMO MSC.81(70) fire safety standards and saltwater resistance.

Construction Scaffolding: Lightweight yet strong tubes for temporary structures, reducing setup time by 30% compared to steel while meeting EN 12810-1 load standards.


Why Choose Us


Corrosion Resistance Innovation

First-to-market galvanized aluminum tubes with patented zinc adhesion promoter, achieving 50% stronger coating-bond (pull-off strength ≥5MPa, ASTM D4541).

Grinding Precision

CNC centerless grinding machines (accuracy ±0.01mm) ensure uniform wall thickness and surface finish, critical for high-pressure hydraulic systems (ISO 12207 compliant).

Material Traceability

Full traceability from billet to finished tube, with each batch accompanied by Mill Test Reports (MTR) and galvanization thickness certificates (ISO 3549 compliant).

Industry Compliance

Certified to EN 10219-1 for structural hollow sections and NACE MR0175 for sour gas environments, ensuring safety in oil & gas and marine applications.


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