Aluminium Extrusions	Roll formed steel	Molded Plastic	Vinyl
Strength (Tensile)	Excellent mechanical properties	High mechanical properties	Varied properties from 0.08-0.8 tensile strength of aluminum extrusions for glass filled compounds	Low mechanical properties
Density	Lightweight: around 1/3 of copper or steel	High density, high pounds/ cubic foot	Extremely light	Extremely light
Strength-to-Weight Ratio	Very good	Good	Fair	Fair
Corrosion Resistance	Excellent	Poor	Excellent	Excellent, but susceptible to acids and organic solvents
Electrical Conductivity	Excellent	Poor	Poor	Poor
Combustibility	Non-combustible	Non-combustible	Combustible	Combustible
Thermal Conductivity	Excellent	Poor	Poor	Poor