UTP A 8036 S description: UTP A 8036 S is an alloy of the same composition as the base material and used for welding cast alloys with a nickel content of 34-40 % (INVAR qualities). The special operational area is the structural welding of housings made of plate and cast pieces with a nickel content of 36 %. Application field: air plane construction. The weld metal contains high mechanical properties and a very low expansion coefficient.