aluminum extrusion profile catalog

Five Essential Aluminum Extrusion Profile Categories for Your Next Project

Selecting the right aluminum extrusion profile is critical for structural integrity, cost-efficiency, and assembly speed. The following five categories represent the most commonly requested profile types in industrial and architectural applications. Each category is defined by its geometry, load capacity, and typical use case.

1. T-Slot Modular Profiles – The Backbone of Factory Automation

T-slot aluminum extrusions are the most versatile profiles in modern manufacturing. The key advantage is the continuous slot that accepts standard T-nuts, allowing infinite adjustability without drilling or welding. Common series range from 2020 (20mm x 20mm) for light-duty frames to 8080 (80mm x 80mm) for heavy structural supports. The 6063-T5 alloy provides excellent corrosion resistance and a smooth anodized finish, while 6061-T6 offers higher tensile strength for dynamic loads. These profiles are widely used for machine bases, safety fences, workbenches, and conveyor systems. MK アルミニウム’s T-slot profiles are extruded with precise slot dimensions to ensure compatibility with global standard hardware.

2. Architectural & Curtain Wall Profiles – Engineering for Aesthetics and Safety

Architectural aluminum extrusions are designed for both visual appeal and structural performance. Curtain wall profiles typically feature thermal breaks (polyamide strips) to reduce heat transfer, meeting energy codes like ASHRAE 90.1. Stick systems are assembled on-site, while unitized systems are pre-assembled in the factory for faster installation. Surface finishes include powder coating (any RAL color) and PVDF (70% Kynar 500) for long-term weather resistance. These profiles must withstand high wind loads and seismic forces. MK Aluminum’s curtain wall profiles are used in commercial complexes, resorts, and office towers, with custom machining for glazing gaskets and pressure plates.

3. Solar Frame & Racking Profiles – Optimized for Photovoltaic Systems

Solar aluminum profiles are engineered for durability and ease of installation in outdoor environments. The most common profiles are 35mm, 40mm, and 45mm rails, which support solar panels via mid-clamps and end-clamps. U-channel and L-bracket profiles are used for mounting structures. The 6005-T5 alloy offers a good balance of strength and extrudability, while 6063-T5 provides excellent surface finish for anodizing. MK Aluminum produces solar racking profiles with pre-drilled holes and slot channels for rapid assembly. These profiles are corrosion-resistant and tested for 25-year service life in harsh UV and salt-spray conditions.

4. Linear Motion & Automation Profiles – Precision for Moving Parts

For applications requiring smooth linear motion, V-slot and precision T-slot profiles are essential. V-slot profiles have a 45-degree angled groove that acts as a raceway for V-wheels, enabling low-friction sliding. Precision guide rails are extruded with tight straightness tolerances (±0.1mm per meter) and are often used in 3D printers, CNC routers, and automated assembly lines. These profiles are typically made from 6061-T6 for higher hardness and wear resistance. MK Aluminum offers custom lengths and pre-machined ends for direct integration with linear bearings and carriages.

5. Heavy-Duty Structural Profiles – Supporting Massive Loads

When projects demand extreme load-bearing capacity, heavy-duty structural profiles like I-beams, H-beams, and thick-walled square tubes are the solution. These profiles are extruded from 6061-T6 or 6082-T6 alloys, which provide yield strengths exceeding 250 MPa. Wall thicknesses range from 3mm to 6mm, and cross-sections can exceed 200mm. Applications include industrial staircases, mezzanine floors, crane rails, and heavy machinery bases. MK Aluminum’s structural profiles are designed to meet national building codes and are often welded or bolted into custom frameworks. The Dongtai factory’s 60,000-ton annual capacity ensures consistent quality for large-scale projects.

よくあるご質問

1. What is the difference between 6063-T5 and 6061-T6 aluminum extrusion?

6063-T5 is commonly used for architectural and decorative applications because it offers excellent surface finish, good corrosion resistance, and moderate strength (tensile strength around 150-190 MPa). It is easier to extrude and anodize, making it ideal for profiles with complex shapes. 6061-T6, on the other hand, has higher tensile strength (around 260-310 MPa) and better weldability, making it suitable for structural components that bear heavy loads. However, 6061-T6 is more difficult to extrude and may have a rougher surface finish. For T-slot frames, 6063-T5 is often sufficient, while for linear motion rails and heavy-duty structures, 6061-T6 is preferred.

2. How do I choose the right T-slot profile size for my machine frame?

The choice depends on the load, span, and deflection requirements. For light-duty frames supporting small components (under 50 kg), a 2020 or 3030 profile is adequate. For medium loads (50-200 kg) with spans up to 1 meter, 4040 or 4080 profiles are common. For heavy loads (over 200 kg) or long spans (over 2 meters), 6060 or 8080 profiles are necessary. You should also consider the slot size: 8mm slots are standard for 2020-4040 profiles, while 10mm slots are used for larger profiles. Use online deflection calculators or consult MK Aluminum’s engineering team to verify load capacity for your specific configuration.

3. Can aluminum extrusions be used outdoors? Will they corrode?

Yes, aluminum extrusions are highly suitable for outdoor use due to their natural corrosion resistance. When exposed to air, aluminum forms a thin, protective oxide layer that prevents further oxidation. However, for harsh environments (coastal areas, industrial pollution), additional surface treatments are recommended. Anodizing (Type II or Type III) provides a hard, wear-resistant layer. Powder coating or PVDF painting offers UV stability and color options. MK Aluminum’s solar and architectural profiles are specifically designed for outdoor use, with finishes tested for 25+ years of durability. Regular cleaning with mild soap and water will maintain the appearance.

4. What is the typical lead time for custom aluminum extrusion profiles?

Lead time depends on the complexity of the profile, the alloy, and the quantity. For standard profiles (T-slot, U-channel, square tube) with existing dies, production typically takes 2-4 weeks for sample quantities and 4-6 weeks for full production orders. For custom profiles requiring new die creation, the process includes die design (1-2 weeks), die manufacturing (2-3 weeks), and sample extrusion (1 week). Total lead time for custom profiles is usually 4-8 weeks. MK Aluminum maintains a large inventory of common dies and can expedite orders for urgent projects. Contact us with your specific requirements for an accurate timeline.

5. How do I ensure the aluminum profiles are straight and within tolerance?

Straightness tolerance is critical for linear motion and frame applications. For standard extrusions, industry tolerance is typically ±0.5mm per meter for straightness and ±0.2mm for twist. Precision profiles for linear motion can achieve ±0.1mm per meter. MK Aluminum uses in-line straightening presses and laser measurement systems to ensure every profile meets specifications. We also offer custom straightening services for critical applications. When ordering, specify the required tolerance class (e.g., “precision” or “commercial”) and request a straightness certificate. Always inspect profiles upon receipt using a straightedge and feeler gauge.

6. What surface finishes are available for aluminum extrusions?

The most common finishes are mill finish, anodizing, and powder coating. Mill finish is the natural surface after extrusion, with visible die lines; it is economical but less aesthetically pleasing. Anodizing (clear or colored) creates a hard, corrosion-resistant layer that can be dyed in various colors; it is ideal for indoor applications. Powder coating offers a thick, durable paint layer in any RAL color, with excellent UV and scratch resistance; it is preferred for outdoor architectural use. PVDF (Kynar 500) is a high-performance coating for extreme weather conditions. MK Aluminum provides all these finishes, with custom color matching and gloss levels.

7. Can aluminum extrusions be welded, and what precautions are needed?

Yes, aluminum extrusions can be welded, but special techniques are required due to aluminum’s high thermal conductivity and oxide layer. TIG (GTAW) and MIG (GMAW) welding are common. Before welding, the surface must be cleaned of oil, dirt, and the oxide layer (using a stainless steel brush or chemical cleaner). A 4043 or 5356 filler rod is typically used. Post-weld heat treatment (aging) may be necessary to restore strength in the heat-affected zone, especially for 6061-T6 profiles. For T-slot frames, mechanical joining (using brackets and T-nuts) is often preferred over welding to maintain modularity and avoid distortion.

8. What is the maximum length of aluminum extrusion I can order?

Standard extrusion lengths are typically 6 meters (20 feet) or 6.1 meters (24 feet) for shipping convenience. However, MK Aluminum can produce profiles up to 12 meters (40 feet) for special orders, depending on the profile size and alloy. Longer lengths may require special handling and shipping arrangements (e.g., flatbed trucks or containers). For very long profiles, consider using splice connectors to join shorter sections. Always check your project’s maximum span and transportation constraints before ordering. We can also cut profiles to exact lengths with a tolerance of ±0.5mm.

9. How do I calculate the cost of a custom aluminum extrusion profile?

Cost is determined by several factors: die creation fee (one-time, typically $500-$3000 for a custom die), material cost (based on alloy and weight per meter), extrusion cost (per kg or per meter), heat treatment, surface finish, and cutting/machining. The die cost is amortized over the order quantity. For small quantities (under 500 kg), the per-unit cost is higher due to setup charges. For large quantities (over 2000 kg), the cost per kg decreases significantly. MK Aluminum provides free cost estimates with a detailed breakdown. Send us your profile drawing or sketch, and we will provide a competitive quote within 24 hours.

10. What certifications or quality standards do MK Aluminum profiles meet?

MK Aluminum’s extrusion factory is ISO 9001:2015 certified, ensuring consistent quality management. All profiles are produced to meet national standards such as GB/T 5237 (China), ASTM B221 (USA), and EN 755 (Europe). We provide material test certificates (MTC) for each batch, including chemical composition and mechanical properties. Our anodizing and powder coating lines comply with Qualicoat and AAMA 2604 standards. For architectural projects, we can provide wind load calculations and thermal performance data. Every profile is inspected for dimensions, straightness, and surface defects before shipment. We are committed to full traceability from billet to final product.

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For high-quality aluminum extrusion profiles, custom solutions, and reliable supply, contact the manufacturer directly:

Email: cnaluprofile@163.com
Phone: +86-13651855050

Shanghai MK Aluminum Group and HMK JS Windows and Doors represent a powerhouse of aluminum innovation. Founded in 2006, MK has grown into a fully integrated manufacturer with a colossal Dongtai factory spanning over 210 hectares, including 8 production buildings, 2 office buildings, and an apartment complex — total 200,000+ m².

Our aluminum profiles are the backbone of T-slot modular assembly frames, conveyor systems, machine frames, protective fences, workstations, linear motion components, stairs, platforms, curtain walls, solar frames & racking systems, and even high-end architectural projects such as commercial complexes, resorts, villas, and office towers.

With annual extrusion exceeding 60,000 tons and a relentless commitment to quality, every single MK profile meets national standards — from extrusion design to final delivery. Whether you need a standard catalog profile or a fully custom extrusion, our engineering team is ready to support your project from concept to completion.