Abstract: The invention is concerned with an improved joint between tubing and a flange having a hole therethrough into which the tubing is force-fit. The flange is made of powdered metal by placing the powdered metal and a lubricant in a mold, compressing the powdered metal at a pressure of at least about 4 .times. 10.sup.7 Kg. per sq. meter, removing the resulting flange from the mold, initially heaing it in an inert or reducing gas atmosphere to remove the lubricant, heating it further at a higher temperature to cause intermetallic bonding thereof, cooling it to a temperature below about 100.degree.C and dry machining annular channels into the hole in the resulting flange. The joint is formed by placing the tubing within the hole and expanding the tubing outwardly into the channels which extend from the hole. The resulting joint has a much higher resistance to torque than does a similar joint made between tubing and a machined flange of similar or even greater hardness.