Components

Abstract

	Mild Steel	Alloy Steels	Aluminium Alloys
Cost for given load	100	100–130	300–500
Cost for given rigidity	100	120–150	400–700
Weight for given strength	100	65–80	16–30
Weight for given rigidity	100	100	30–60

This table is not a comparison of the behaviour of the materials as such; it is the relative performances of frameworks designed to exploit best each material for the same applied load on the frame.