A method is provided for piercing and enlarging metal members at high temperatures, particularly members containing slag inclusion, by the steps of urging said member, over a piercer or enlarger point by rolling whereby said point passes through and forms an axial opening in the ingot, said point being formed of an alloy comprising 0.015% to 2% carbon, about 5% to 65% cobalt, about 15% to 35% chromium and up to about 30% iron and amounts of boron, nickel, silicon molybdenum, vanadium, aluminum, tantalum, tungsten, titanium, copper and columbium for imparting the qualities generally associated therewith without detrimentally affecting the hot hardness and resistance to erosion of said alloy at said elevated temperature.