Aluminum cable trays typically use 6063-T6 aluminum alloy for their plates and structural components.

Material Specification

The standard aluminum grade for cable tray plates, including splice plates, is 6063-T6. This alloy is widely used due to its high strength, corrosion resistance, and excellent formability, making it suitable for both indoor and outdoor applications . The T6 temper indicates that the aluminum has been solution heat-treated and artificially aged, providing a good balance of mechanical strength and durability .

Mechanical and Environmental Properties

• Lightweight: Aluminum trays weigh approximately half as much as equivalent steel trays, facilitating easier installation .
• Corrosion Resistance: 6063-T6 forms a natural oxide layer (alumina) that protects against atmospheric corrosion, stress corrosion cracking, and pitting . This makes it ideal for harsh environments, including industrial and marine applications .
• Thermal Conductivity: Aluminum's high thermal conductivity helps prevent cable overheating, enhancing safety .
• Load Capacity: Despite being lightweight, 6063-T6 aluminum trays maintain high structural strength and can support dense cable transitions .

Standards and Compliance

Aluminum cable trays and their components are typically NEMA VE-1 and IEC 61537 certified, ensuring compliance with industry safety and performance standards . Hardware for aluminum trays is usually zinc-plated or Type 316 stainless steel for outdoor use, in accordance with ASTM B633 .

Summary

For cable tray applications, 6063-T6 aluminum alloy is the preferred grade due to its combination of strength, corrosion resistance, lightweight design, and compliance with international standards. It is suitable for a wide range of environments, from commercial buildings to industrial facilities, and provides a durable, long-lasting solution for cable management .