https://www.avient.com/knowledge-base/article/how-lightweight-automotive-components?ind[]=6601
If heat dissipation is the primary driver, thermally conductive polymers could be an excellent alternative.
However, advancements in engineering thermoplastics now enable effective heat dissipation comparable to metals but at a fraction of the weight.
Thermally conductive plastics help dissipate the heat, adding life to the fixture while offering additional design and manufacturing benefits.
https://www.avient.com/products/engineered-polymer-formulations/flame-retardant-formulations/maxxam-sy-foamable-flame-retardant-formulations
With better heat and crush resistance versus foamed PE and FEP, Maxxam SY formulations also include options for 'zero halogen, low smoke and fume.'
Crush and heat resistance
Discover two distinct advantages over regular polyethylene: greatly-improved heat resistance and oil resistance