Abstract: The invention relates to a process for producing a valve seat for a cylinder head of an internal combustion engine, in which an additional material is fused to the cylinder head, through introduction of energy, at the location at which the valve seat is to be formed, wherein the additional material used is a copper alloy which, in addition to copper, comprises the following elements: iron less than ?5% by weight, manganese 10% by weight-20% by weight, cobalt ?5% by weight-10% by weight, molybdenum ?5% by weight, 9% by weight, 5% by weight, boron ?1% by weight-3% by weight, chromium less than ?3% by weight.