Thick Wall Aluminium Angle Section – Heavy-Duty 6061-T6 Structural Angles | Shengxin

When standard aluminium angles lack the cross-sectional strength to carry the loads your structure demands, the Thick Wall Aluminium Angle Section provides the necessary upgrade. By specifying a wall thickness significantly greater than typical commercial angles — often 8 mm, 10 mm, 12 mm, or more — these profiles deliver substantially higher section modulus and moment of inertia, enabling them to resist bending, buckling, and torsional loads that would compromise thinner sections.

We extrude these heavy-duty angles exclusively from 6061-T6 structural aluminium alloy, which offers a minimum tensile strength of 290 MPa and yield strength of 240 MPa. This is not a decorative trim piece; it is a load-bearing structural component. The thick legs combined with the high-strength alloy make these sections suitable for welded steel-aluminium transition frames, heavy machinery bases, transport trailer subframes, and industrial support brackets where safety factors are non-negotiable.

Shengxin's 5500-ton extrusion press is specifically suited to pushing these thick-walled profiles with consistent metallurgical quality. Unlike suppliers who may attempt to bend thick plate into angle shapes — introducing residual stress and inconsistent corner radius — our fully extruded thick wall angles maintain homogeneous grain structure through the entire cross-section, including the critical 90° corner. This translates to predictable mechanical behaviour under load and reliable weld performance when integrated into larger aluminium angle profile assemblies.

Features & Benefits

• Exceptional load capacity: Wall thicknesses from 8 mm up to 15 mm or more provide significantly higher section modulus than standard 2-6 mm angles — critical for cantilevered supports and heavy equipment frames.
• 6061-T6 alloy as standard: Minimum 290 MPa tensile and 240 MPa yield strength. This alloy also offers excellent weldability, making it the structural engineer's default choice for fabricated aluminium frameworks.
• Extruded, not bent: The 90° corner is integral to the extrusion, not formed by bending plate. This eliminates spring-back variation, residual forming stress, and inconsistent corner radius issues associated with bent angles.
• Full penetration welding ready: The thick legs allow for substantial weld preparation — bevels, fillets, and full-penetration butt welds — without risk of burn-through, enabling robust connections to other structural members.
• Corrosion resistance without maintenance: 6061 alloy naturally resists atmospheric corrosion. For harsh environments, we apply anodised or powder coated finishes that add decades of protection with zero ongoing maintenance.
• Machinable for precise connections: Thick walls permit drilling and tapping of substantial threads (M10, M12, M16 and larger) directly into the angle legs — eliminating the need for separate nut plates or weld nuts in many designs.

Typical Thick Wall Angle Sizes & Section Properties

The table below lists commonly produced thick wall configurations. Larger leg lengths and custom thicknesses are available on request.

The weights above are theoretical values based on 6061 alloy density of 2.70 g/cm³. Actual weights may vary slightly due to corner radius and manufacturing tolerances per EN 755.

Technical Specifications

When to Specify Thick Wall Angles Over Standard Angles

In essence, specify thick wall angles when the structural calculation demands it. For general-purpose applications, our equal leg aluminium angle profiles offer the right balance of weight and performance.

Heavy-Duty Applications

• Machinery bases and frames: CNC machine support structures, press frames, and conveyor chassis where rigidity and vibration damping are critical — thick aluminium angles provide stiffness without the weight penalty of equivalent steel sections.
• Heavy vehicle and trailer subframes: Used as longitudinal bearers and cross-members in truck bodies, flatbed trailers, and RV chassis extensions, where dynamic loads and road shock demand high fatigue resistance.
• Industrial shelving and storage: Upright supports and shelf beams in pallet racking, mezzanine floors, and heavy-duty warehouse storage systems that must support thousands of kilograms per bay.
• Bridge and infrastructure components: Aluminium pedestrian bridge stiffeners, guardrail posts, and structural connectors in coastal environments where steel would corrode — aluminium extrusions like thick wall angles combine structural integrity with inherent corrosion resistance.
• Solar farm mounting structures: Ground-mount solar array support angles that must withstand wind uplift and snow loads across large spans without intermediate supports.
• Marine and offshore equipment: Davit bases, platform supports, and equipment skids on vessels and offshore installations where salt-laden atmospheres rapidly attack unprotected steel.

Fabrication & Finishing Options

Why Shengxin for Thick Wall Aluminium Angles?

Extruding thick wall sections demands press capacity, die durability, and metallurgical control that not every extruder possesses. Shengxin's 35 extrusion lines — including presses up to 5500 tons — provide the force and thermal stability needed to push heavy 6061-T6 billets through complex thick-section dies while maintaining grain structure integrity. With 29 years of extrusion experience, we understand the relationship between extrusion ratio, quench rate, and mechanical properties for thick profiles.

Global Delivery for Heavy Sections: 5,000-ton warehouse capacity with overhead cranes rated for heavy bundles. 5 independent container loading platforms handle oversized crates and pallets. We export structural aluminium profiles to 97 countries with all necessary customs and compliance documentation.

Thick Wall Aluminium Angle FAQ