A method for manufacturing a valve spindle having a valve disc and a
valve stem, the method comprising the steps of: providing a
capsule, which defines at least a portion of the valve disc; arranging, in the
capsule, a preformed core body that includes a core head, which constitutes an inner portion of the valve disc; arranging a preformed annular
valve seat in the
capsule, wherein the
valve seat is arranged such that the inner circumferential side of the
valve seat at least partially defines an inner space around the core head; filling the inner space with a first metallic material, forming the buffer layer, such that the core head is covered with the first material; filling the capsule with a second metallic material, forming the cladding layer; subjecting the capsule to
Hot Isostatic Pressing (HIP) at a predetermined temperature, a predetermined isostatic pressure and for a predetermined time so that the preformed core body, the buffer layer, the cladding layer and the valve seat are bonded metallurgically.