Aluminum Alloy 5456 is a wrought aluminum-magnesium alloy. It is chemically very similar to Aluminum Alloy 5356, which is primarily used as welding filler, but is used in structural applications because of its strength and easily weldable properties. It is best formed by extrusion, rolling, and forging, though forging is less common. Continental Steel & Tube Company offers Aluminum Alloy 5456 in a number of forms including channels.