25 de gree and total twist over 20 feet of length not to exceed 1.5 degrees Volume for volume, aluminum weights about 1/3 as much as iron, steel, copper or brass.Ġ.0125 inches per 1 foot of length not to exceed 0.118 inches over 20 feet of lengthĠ.32mm per 304mm of length, not to exceed 3mm over 6.1 m of length.80/20's 6105-T5* alloy yield strength of 35,000 psi compares to A36 carbon steel's yield strength of 36,000 psi.
