Abstract: A method for preventing weld cracking of autogenous weldments of metastable stainless steel during deforming of the weld, as by stretching; this is achieved by cooling the weld with a pressurized CO.sub.2 spray during the deforming operation.

Abstract: A corrosion resistant tube assembly is disclosed comprising a corrosion susceptible metal tubing having an outside surface, an inside surface and end surfaces. Peripheral end portions of the tubing are provided with an overlay of corrosion resistant metal extending along a portion of the outside surface and across the end surfaces of the peripheral end portions of the corrosion susceptible metal tubing. The overlay has an inside surface and an outside surface provided with threads at a depth less than that which would expose the outside surface of the corrosion susceptible tubing. The assembly also includes a corrosion resistant, tubular metallic liner having an outside surface disposed adjacent the inside surface of the corrosion susceptible metal tubing, and end surfaces extending beyond the end surfaces of the corrosion susceptible metal tubing.

Abstract: A system comprising a ferritic stainless steel substrate having a tightly adherent oxide coating and a catalytic material thereupon. The ferritic stainless steel is of a chemistry which forms a tightly adherent non-spalling scale suitable for application of a catalytic bearing material. It consists essentially of, by weight, up to 26% chromium, from 1 to 8% aluminum, from 0.02 to 2% hafnium, up to 0.3% yttrium, up to 0.1% carbon, up to 2% silicon, balance essentially iron.

Abstract: There is disclosed an electrode for overlay welding made up of laminations. All of the laminations are composited to be hot workable; and they may be austenitic stainless steel, ferritic stainless steel, duplex structures that are hot workable, or pure metals such as chromium. The combined composition of all laminations, when they are melted and resolidified, will contain at least 2%w of delta ferrite.