Welding Certification – Aluminum Structural Applications, AWS D1.2

What style of Structures are made from aluminum? The first thing that comes to mind is Ships. Light weight aluminum hull ships are becoming increasingly in demand for military applications as well as for commercial vehicles. perfiles bosch

Why? Aluminum is less heavy and that saves energy and increases speed.

AWS D1. 2 is the Structural welding code for aluminum. It not only provides weld joint design and limitations but also specifies how welders are to be certified for welding aluminum. 

The primary operations used to weld aluminium structures are Gas Tungsten Arc (GTAW), Gas Metallic Arc (GMAW), and varying polarity plasma arc (VPPAW). Gas metal arc is the mainstay welding process for shipbuilding but chaffing stir is being explored as a likelihood in the future.

Combined with the need to certify the welder, That is especially important for the procedure to be qualified for aluminum constructions. Aluminum loses a great deal of its durability when welded and the process used to weld it can greatly affect the outcome. Usually, its a struggle to work with enough heat input to limit porosity, while at the same time, use low enough heat suggestions not to alter the strength and other physical properties of the combination.

Carbon steel will shore up if it is heated up to a high enough temperature and then cooled down quickly. That’s how we make knife blades and such.

But aluminum is merely the opposite. When it is heated to an elevated temperature as happens during welding, it immediately commences to lose the hardness, whether its a heat treatable alloy like 6061 t6, or 3003 h14. Either way it loses hardness and durability if this gets hot enough. Quick quenching after heating system only ensures softness.