Iron or Aluminium Wire?

Support and shaping

Low-carbon steel wire is commonly used for supports and frames. Soft aluminium wire is often selected for decorative bends and visible wraps. Neither description is a load rating. Check a sample of the intended diameter, temper and construction under the intended load.

Repeated bending can work-harden metal and cause failure. Do not assume either material is suitable for repeated adjustment or a safety-critical hanging application without appropriate assessment.

Weight

At equal cross-section and length, aluminium is roughly one-third the weight of steel. This can be useful for decorative pieces, but does not mean equal load-carrying capacity. See theoretical wire weight.

Corrosion and colour

Aluminium forms an oxide film that helps resist corrosion, but can still corrode in unsuitable conditions. Steel finishes such as zinc or lacquer offer different forms of protection. Describe moisture, salts, chemicals and contact with other metals when discussing an application.

Both steel and aluminium products can have coloured finishes. Choose colours available for the particular product rather than assuming every colour is offered in every material or size.

Cutting and selection

Use cutters rated for the material and diameter. Keep cut ends away from hands and delicate surfaces. Include the purpose, dimensions, finish and a drawing or sample in an enquiry.

Reference

ASM International: aluminium and its alloys describes density, work hardening and corrosion behaviour. It does not certify a particular floral wire or frame.