What is the difference between 6061 T6 aluminum and 6061 T651?
Al 6061 T6 possesses the similar chemical & mechanical
properties as Al 6061 T651.
T651 designates that the extrusion has to undergo stretching or
permanent set to relieve the extrusion from residual stresses for a
uniform machinability. Apart from that, there is no change in the
chemical or mechanical properties. Al 6061 T6 is same as Al 6061
T651 & usage of T6 instead of T651 will not affect any
functional aspect of the component.