In general, stiffer and lighter types could be obtained with aluminium alloy than is feasible with steels. For illustration, take into account the bending of a skinny-walled tube: the second minute of area is inversely associated with the strain inside the tube wall, i.e. stresses are decreased for larger values. https://newbiesinbusiness.loginblogin.com/35208303/the-best-side-of-aluminium