Abstract: A nozzle assembly for atomizing a stream of molten metal includes a refractory metal-transmitting nozzle having a short metering orifice at its entrance end and a relatively long divergent discharge passage terminating at a flat annular land formed at the bottom end of the metal-transmitting nozzle. The metal-transmitting nozzle is seated in an opening in the bottom of a tundish or other source of molten metal with its upper end containing its metering orifice projecting into the molten metal reservoir. The lower-end portion projects from the bottom of the tundish and through the central portion of an atomizing fluid nozzle assembly in which it seats. The central portion of the atomizing fluid nozzle assembly projects below the bottom member of the atomizing fluid nozzle assembly and forms an atomizing fluid orifice therewith.

Abstract: A process for making tubes, channels and other relatively thin-walled elongated shapes having a unique degree of dimensional accuracy and stability in which the part after being shaped and only approximately sized is mounted on a mandrel having a larger coefficient of thermal expansion than the part. The mandrel and the part are connected at their opposite ends so that expansion of the mandrel first causes elongation and concomitant lateral shrinkage of the part and then lateral expansion of the part so that it is triaxially hot worked to bring it to its final hot size from which the part contracts to its finished size at room temperature. For maximum freedom from residual stresses and dimensional stability thermal sizing is carried out by heating to a temperature at least just above the recrystallization temperature of the part.

Abstract: A sulfidation-resistant alloy having high stress-rupture strength at about 1350.degree.-1500.degree.F, containing about 0.02-0.08% carbon, 21-26% chromium, 52-58% nickel, 1-3.5% molybdenum, 1.75-3.25% titanium, 0.75- 2.25% aluminum, 0.50-2.00% columbium, up to 0.02% boron and the balance iron.

Abstract: An ultrasonic measuring system particularly suited for measuring the wall thickness of large tubing of widely different shapes and sizes. An ultrasonic transducer is adjustably supported in an ultrasonic head assembly so as to provide precise focusing of the energy across a gap to the surface of the part being measured. The head assembly is urged against the surface of the part while the two are displaced relative to one another so that the transducer scans a predetermined path along the part. Freely rotatable balls carried by the head assembly engage the surface of the part while a column of water is maintained to fill the gap between the transducer and the surface of the part. Provision is made for rotating circular parts so that the transducer sweeps out a spiral path over the surface of such parts.

Abstract: An iron-nickel base alloy containing 0.10% Max. carbon, 2% Max. manganese, 1% Max. silicon, 13.5-16% chromium, 24-28% nickel, 1-1.75% molybdenum, 1.6-2.7% titanium, 0.7-1.2% columbium, 0.5% Max. vanadium, 0.35% Max. aluminum, 0.001-0.01% boron, and the balance iron plus incidental impurities having improved strength as compared to A-286 Alloy and capable of attaining at least about 180 ksi yield strength when cold worked as little as about 15% and precipitation hardened. The alloy is especially useful in making large massive parts such as retaining rings which are substantially fully austenitic and nonmagnetic for the rotor windings of very large electric generators.