The inventive concept relates to method for manufacturing a metal based component comprising at least one protrusion. The method comprises: providing a metal based substrate comprising a surface having at least one cavity; providing a metal based protrusion element comprising a first portion and a second portion, wherein said first portion has a shape that conforms to a shape of the cavity; arranging the first portion of the protrusion element in said cavity such that at least the second portion of the protrusion element protrudes at least 5 mm from a surface of the metal based substrate, to form a substrate comprising a protrusion; placing said substrate comprising a protrusion in a canister such that a void is formed between the canister and the surface of the substrate comprising the protrusion; filling at least a portion of the void with a diamond powder such that the surface of the substrate comprising the protrusion is covered by the inert filler material; removing gas from the interface between said diamond powder and said substrate comprising the protrusion; subjecting said substrate comprising the protrusion to a hot isostatic pressing process for a predetermined time at a predetermined pressure and a predetermined temperature such that said substrate and protrusion element bond metallurgically to each other to form said metal based component comprising said at least one protrusion; removing at least a part of said diamond powder from said metal based component having a protrusion, wherein a melting point of the diamond powder at said predetermined temperature is higher than said predetermined temperature.