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Aluminum Cable Tray: Advantages, Limits and When to Choose It

Created on 11.04

Aluminum Cable Tray: Advantages, Limits and When to Choose It

Aluminum cable tray is light, does not rust, and resists corrosion in many outdoor and aggressive environments, which makes it a good choice for coastal sites, tunnels, clean areas, and high routes where weight matters. Its limits are lower stiffness and strength than steel, more thermal expansion, and galvanic corrosion when it touches carbon steel hardware. Choose it when weight and corrosion resistance matter more than span and load, and check the load data against your support spacing before you order. This guide explains the advantages, the limits, how it compares with other tray materials, and when to choose it.

What Aluminum Cable Tray Is

Aluminum cable tray is made from aluminum alloy sheet or extruded sections, formed into the same shapes as steel tray: ladder, perforated, solid-bottom, and trunking. Aluminum forms a thin oxide layer on its surface, and that layer protects the metal underneath from further corrosion in most atmospheres. The exact alloy and temper vary by maker, so ask for them in writing [confirm the alloy used in your products].

Advantages

  • Light weight:
  • Corrosion resistance:
  • No coating to wear off:
  • Easy to work:
  • Clean look:
  • Non-magnetic:

Limits

  • Lower stiffness and strength:
  • More thermal expansion:
  • Galvanic corrosion:
  • Softer surface:
  • Heat:
  • Strong alkalis:
  • Cost:
Aluminum cable tray advantages and limits comparison, covering light weight, corrosion resistance, stiffness, thermal expansion and galvanic corrosion

How It Compares with Other Tray Materials

Material
Weight
Corrosion resistance
Strength and stiffness
Typical use
Pre-galvanized steel
Heavier
Basic, for dry indoor
High
Dry indoor routes
Hot-dip galvanized steel
Heavier
Good, for outdoor and humid
High
Industrial, outdoor, and long-span routes
Stainless steel 304 / 316
Heavier
Very good, 316 for chlorides
High
Corrosive, coastal, and hygienic areas
Aluminum alloy
Light
Good in most atmospheres
Lower than steel
Light loads, coastal, tunnels, and weight-sensitive routes
No material is best everywhere. Aluminum is strong in weight and corrosion, and weaker in span and load, so it is a good fit when those two matter most.
Comparison of aluminum alloy, pre-galvanized steel, hot-dip galvanized steel and stainless steel cable trays by weight, corrosion resistance, strength and typical applications

When to Choose Aluminum

  • Coastal and offshore-adjacent sites,
  • Tunnels and damp underground routes,
  • Clean and food areas,
  • High or hard-to-reach routes,
  • Light cable loads,
For heavy power cables over long spans, steel is usually a better fit, and stainless steel suits the most aggressive chemical sites.
Comparison of aluminum cable tray in contact with carbon steel fasteners versus stainless steel fasteners with isolation gasket

Using Aluminum Tray Well

  1. Check the load data.
  2. Plan for expansion.
  3. Control galvanic corrosion.
  4. Bond and earth it properly.
  5. Handle with care.

Common Mistakes

  • Using steel spans.
  • Mixing metals without care.
  • Skipping expansion joints.
  • Using it near strong alkalis.
  • Assuming it is fire rated.
Five scenarios for choosing aluminum cable tray: coastal sites, tunnels, clean food areas, high installation routes and light cable load routes

Conclusion

Aluminum cable tray gives low weight and good corrosion resistance, at the cost of lower stiffness, more thermal expansion, and care with dissimilar metals. Choose it for coastal sites, tunnels, clean areas, and routes where weight is a problem, check the load and span, plan for expansion, and use suitable hardware. Final selection should follow your project specification and the applicable standards.

FAQ

Is aluminum cable tray as strong as steel?

No. Aluminum is lighter but less stiff and strong than steel, so for the same load it may need a shorter span or a thicker section. Check the load data for your size and thickness.

Does aluminum cable tray rust?

No, it does not rust. It forms an oxide layer that protects it in most atmospheres. It can still be attacked by strong alkalis, and it can corrode where it touches carbon steel in damp air.

Can I use aluminum tray with galvanized steel supports?

It can be done, but the contact point is a risk in damp air. Use stainless steel fixings, and isolate the metals where the design requires, as your specification says.
Looking for aluminum cable tray for your project? Browse our cable tray range, or email abby@wananelectric.com with your tray type, width, load, and environment, and our team will recommend a material and quote.

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Room 17A01, Block 1, Yintai Building, No. 15 Huilong Road, Shengping Community, Longcheng Street, Longgang District, Shenzhen City,

Guangdong Province, China 

Shenzhen Wanan Industrial Co., Ltd. is a China-based manufacturer of Cable Tray Systems and GI Electrical Conduits, established in 2004.

We manufacture perforated cable trays, cable ladders, cable trunking, galvanized and ZAM cable trays, and EMT, IMC and rigid steel conduits. With 22+ years of manufacturing experience, we provide factory-direct supply, OEM/ODM customization, and technical support for EPC contractors, MEP contractors, distributors, and industrial projects worldwide.

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