Abstract: Disclosed is an alloy eminently suited for use as a tubular product in deep, sour gas operations. The alloy has an optimum combination of corrosion resistance, high strength in the cold worked condition and resistance to sulfide stress cracking and stress corrosion cracking. A typical alloy contains, in weight percent, 0.03 carbon, 22 chromium, 36 iron, 3 molybdenum, 1 manganese, 36 nickel, 0.60 silicon, 0.15 nitrogen, up to 3 tungsten and incidental impurities including copper, cobalt, columbium, tantalum and titanium.

Abstract: A high chromium stainless steel especially suited for use as wear (galling) resisting components, for example, valve parts. A typical alloy generally contains chromium, nickel, silicon, carbon, an effective cobalt content and the balance iron plus normal impurities. The alloy may be produced in the form of castings, P/M products, hardfacing and welding materials and wrought mill products.

Abstract: Disclosed is an oxidation resilient nickel alloy containing chromium, tungsten and molybdenum in a critical relationship that provides a combination of engineering properties including a high degree of dynamic oxidation resistance and superior strength.The alloy is especially suited for service under severe conditions, for example, as components of gas turbine engines.

Abstract: An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the connecting member. The muffs are each comprised of a cup and an earseal cushion. The muffs are characterized by greater attenuation in high intensity environments than in low intensity environments. Each muff has a cup which is at least partially porous. Each muff has a specific airflow resistance of from between 3,000 and 105,000 SI rayls. At least one porous portion of each cup defines a tortuous path. The mean pore size of this porous portion is at least 160 micrometers.

Abstract: A powder metallurgical process for producing a wrought product characterized by a low level of residual impurities. The process comprises the steps of: comminuting metal powder to effect a reduction in particle size, at least 60% of the comminuted particles being capable of passing through a -270 mesh Tyler screen; blending the metal powder with a softer metal-bearing powder; heating the blended powder particles at an elevated temperature, the particles adhering and forming a mass during heating; crushing the mass of powder particles; cold-isostatically pressing the crushed mass of powder; sintering the powder in the absence of an encapsulating member under conditions which effect a reduction in the nitrogen, oxygen and carbon levels of the powder; and hot working the sintered powder into a wrought product. The wrought product has less than 0.015% carbon.

Abstract: A process for producing a wrought product of improved ductility from substantially noncompactible prealloyed metal powder. The process comprises the steps of: comminuting substantially noncompactible prealloyed metal powder so as to flatten the particles thereof; heating the comminuted particles of metal powder at an elevated temperature, the particles adhering and forming a mass during heating; crushing the mass of metal powder; compacting the crushed mass of metal powder; sintering the metal powder; and hot working the metal powder into a wrought product. The wrought product has a chemistry which is substantially the same, with the exception of carbon and certain residuals, as the chemistry of the prealloyed powder.

Abstract: This invention relates to components of ceramic kiln and furnace hardware made of NICRALY alloys.Disclosed is a method of heat treating NICRALY alloys to obtain a uniform film of desired alumina (Al.sub.2 O.sub.3) on the surface of the alloys. The gist of the invention resides in the control of the critical relationship between the temperature and the partial pressure of oxygen in the oxygen potential controlled atmosphere during the heat treatment. Optimum results are obtained when the temperature is about 2100.degree. F. and the dew point is about -30.degree. F. in hydrogen for about one hour.

Abstract: An improved system for detecting the location of a molten metal/slag interface during the casting of electroslag remelted hollows is provided. The system includes a gamma ray radiation source (30) and a scintillation counter (40). The source (30) and counter (40) reside outside the casting crucible (1) and are held in fixed spatial relationships with respect to one another and with respect to the mandrel (10). The radiation from the source (30) is directed through the crucible (1) and through the annular casting zone (9) defined between the sidewalls of the upwardly driven mandrel (10) and the crucible (1). The counter (40) provides an electrical signal responsive to the rate of radiation events detected thereby.

Abstract: Disclosed is a hard wear resistant nickel based alloy including a carbide-former, preferably niobium, and essentially cobalt free but which has similar properties to cobalt, chromium, tungsten, carbon alloys. Typically the alloy has a composition, in parts by weight, Cr-34 C-1.2, Mo-10, Fe-3, Si-1, Nb-3, Ni-balance. The alloys of the invention are suitable for surface or welding consumables, and as articles for making hardfacing depositions.

Abstract: Disclosed is a cobalt-base superalloy containing about 32% cobalt, 8% nickel, 26.5% chromium, 2.5% tungsten, 5% niobium, about 1% each manganese and silicon, about 0.4% carbon, and the balance about 23% iron plus incidental impurities and modifiers normally found in alloys of this class. The alloy is readily processed in the form of wrought products, castings, metal powder and all forms of welding and hardfacing materials. The outstanding characteristics of the new alloy include the resistance to cavitation erosion and galling, low cost and minimal use of strategic metals.

Abstract: A nickel-base alloy resistant to wear is disclosed. The alloy contains as its principal elements chromium, molybdenum, silicon, boron and carbon. The alloy, when composed of the elements in the proportions as taught, provides an outstanding combination of engineering properties including abrasive and adhesive wear, corrosion resistance, hot hardness and impact strength. This combination of properties is essential when the alloy is used in certain suggested forms including internal combustion engine parts, fluid valve parts, gas and steam turbine parts and chain saw guide components.

Abstract: A method for improving the compaction characteristics of a substantially noncompactable metal powder comprising preparing a superalloy, for example, a nickel base alloy, minus a portion of at least one metal (i.e., 5 weight percent); atomizing the melt and milling it to a fine powder (i.e., about average Fisher size of 9.0 microns); blending an equal portion (i.e., about 5 weight percent) of, for example, carbonyl nickel into the milled powder; sinterbonding the mixture into a "cake" and then further processing as may be required to obtain the desired article. It is believed the "soft" carbonyl nickel acts as a binder for the prealloyed nickel-base alloy powder.

Abstract: Disclosed is a NICRALY alloy containing nominally about 16% chromium, about 5.3% aluminum, about 0.02% yttrium and the balance essentially nickel, and heat treated in a manner to develop an essentially aluminum oxide surface. The NICRALY alloy is especially suited for use as components and support systems in kilns that are used in the firing steps in the manufacture of ceramic articles.

Abstract: An aluminum-titanium-boron master alloy is provided that is characterized by an optimum promotion of fine grain together with sufficient ductility for it to be produced in the form of a wrought product, for example, continuous rod. The alloy of this invention preferably contains about 8 weight percent titanium, about 0.4 weight percent boron and the balance essentially aluminum and incidental impurities normally found in alloys of this class.

Abstract: An improved oxidation resistant iron base alloy article for welding to another article to form a composite product with reduced heat affected zone cracking is provided consisting essentially of about 0.05 to 0.7% carbon, less than 0.3% columbium, about 15 to 30% cobalt, about 18 to 25% chromium, about 0 to 2% manganese, about 1 to 6% molybdenum, about 0.10 to 0.30% nitrogen, about 15 to 30% nickel, about 0.2 to 0.6% silicon, about 0.1 to 2% tantalum, about 1 to 10% tungsten, about 0 to 0.1% zirconium, about 0 to 0.5% aluminum, about 0 to 0.1% lanthanum and the balance iron >23 w/o with incidental impurities not exceeding 0.6% in aggregate. The combined % of columbium and tantalum being at least 0.4% and the combined carbon and nitrogen being >0.2%.

Abstract: Disclosed is a wear-resistant Fe-Ni-Co-base alloy that is suitable for use as coatings, sintered powder metal parts, and material for application of hard-facing depositions and/or plating. The alloy preferably contains about 11% cobalt, 24% nickel, 3% each molybdenum and tungsten, 26% chromium, 1.3% silicon, 1% carbon, about 0.5% boron, up to 4% modifying elements Mn, V, Ta, Cb, Cu, La, Zr, R-E metals, and the balance essentially iron plus incidental impurities.

Abstract: Alloys containing 15-29% chromium, 12-35% iron and the balance 38-72% nickel plus cobalt as the essential major ingredients are greatly stabilized with respect to both weld crack resistance and oxidation resistance by the addition of lanthanum in effective but carefully controlled amounts of less than 0.10% and preferably less than 0.08% in the presence of between about 0.2 and 2.0% silicon as an essential minor ingredient.

Abstract: A method of forming a hard surfacing on a metal article is provided based upon forming a weld wire with a diffusion layer containing boron and depositing the wire on the surface to be hard surfaced by means of an electric arc to form a substantially uniform boron containing alloy weldment composition.

Abstract: Disclosed is a nickel-base alloy typically containing in weight percent, about 2.7 carbon, about 10.5 cobalt, about 27 chromium, about 23 iron, about 10 molybdenum plus tungsten, up to 2.5 maximum tungsten, and the balance nickel and incidental impurities. The alloy is especially suited for use as wear-resistant articles and may be produced in various forms, such as castings, metal powder, tube rod and/or wire and wrought articles. The alloy composition is particularly designed to conserve cobalt and tungsten and yet provide wear-resistant articles comparable to cobalt-base alloys with high tungsten contents.