Abstract: Boron-containing steel products having boron contents of up to 200 ppm are obtained by an annealing process in the temperature range of between 850.degree. and 1050.degree. C. The characterizing feature of the invention is that the products are annealed in the state of equilibrium in a non-oxidizing gaseous atmosphere with a boron potential supplied by a pulverulent boron oxide source having a value such that the products retain or adsorb their boron content. The boron source is quantitatively about 100 g of B.sub.2 O.sub.3 per m.sup.3 of annealing space. In an annealing gas atmosphere mainly consisting of hydrogen, the steam partial pressure can be adjusted at atmospheric pressure in the presence of B.sub.2 O.sub.3 to the required boron activity within the range of between 10.sup.-3 to 10.sup.-5. The products can also be simultaneously case hardened during annealing. The case hardening agent can be mixed with pulverulent boron oxide as the boron source.

Abstract: A ferritic, heat-resistant steel whose behavior at high application temperatures is improved by the combined addition of oxygen affinitive elements. Apart from stabilizing the electric resistance of heating elements by addition of zirconium, titanium and rare earth metal, also the creep elongation of the steel is considerably reduced under load at temperatures above 900.degree. C., the thermal stress capacity thus being increased. The resulting complex oxide coating increases the protective function with regard to preserving the metallic cross-section in continuous and/or cyclic heat treatments.The steel is composed of:up to 0.10 % Cup to 0.80 % Si0.10 to 0.50 % Mnup to 0.035 % Pup to 0.020 % S12 to 30 % Cr0.10 to 1.0 % Moup to 1 % Ni3.5 to 8 % Al0.01 to 1 % Zr0.003 to 0.8 % rare earth metals0.003 to 0.30 % Ti0.003 to 0.050 % Nremainder Fe and incidental impurities.

Abstract: A martensite steel, especially for plastic molds, of the following compositions:0.001 to 0.1% carbon0.50 to 2.0% silicon8.0 to 14.0% manganese0.3 to 5.0% titanium0.001 to 1.0% aluminum0 to 2.0% chromium0 to 3.0% molybdenum0 to 4.0% nickel0 to 4.0% tungsten0 to 5.0% cobaltremainder iron, including impurities caused by manufacture.

Abstract: The invention relates to a semi-finished product for the production of catalysts, consisting of a metallic carrier and a coating of the carrier on its surface. The coating consists of particles of metallic powder anchored to the material of the carrier and to each other by sintering and contains pores. The invention also provides a method of producing a metallic carrier with a coating for the anchoring of the reactive oxide layer or of the catalytically acting material.

Abstract: An alloy is proposed for use in making permanent magnets. The alloy has the following composition by weight:______________________________________ Chromium 22.5 to 25.5% Cobalt 15.0 to 17.5% Molybdenum 2.0 to 4.0% Silicon 0.1 to 0.8% Oxygen less than 0.10% Effective carbon less than 0.06% Remainder iron and unavoidable impurities, ______________________________________where effective carbon is defined as carbon content plus 0.86 times nitrogen content.In a method of manufacturing permanent magnets, a workpiece is made of the alloy, for example by suction or extrusion casting, and the workpiece is subjected to a heat treatment comprising:(a) a homogenizing annealing for 15 minutes to 3 hours at 1230.degree. C. to 1280.degree. C., followed by quenching in water or oil; and(b) a thermo-magnetic treatment for 10 to 30 minutes at 720.degree. C. to 740.degree. C., followed by the application for 10 to 120 minutes in a preferred axial direction of a magnetic field of 80 to 240 kA/m at a temperature of 630.degree. C.

Abstract: The invention relates to a nickel/iron casting alloy, containing no cobalt, exhibiting high strength at elevated temperatures accompanied by insensitivity to thermal fatigue, and possessing microstructural constituents which are thermodynamically highly stable. The alloy exhibits high hardness at elevated temperatures, outstanding resistance to oxidation, corrosion and wear, as well as good welding properties. The alloy is particularly suitable as a material for nuclear reactor components, and is composed of1.1 to 1.6% of carbon0.5 to 1.5% of silicon0.01 to 0.2% of manganese22 to 26% of chromium12.5 to 14.5% of molybdenum0.2 to 0.8% of niobium (columbium)35 to 40% of nickelless than 0.01% of boronless than 0.002% of tantalum and18 to 26% of iron, to make up 100%.

Abstract: Disclosed herein is a highly wear-resistant, corrosion-resistant steel having high thermal resistance and tempering stability which consists of Fe; 0.7-1.7%C; 0.01-0.08%N; 0.02-1.5%B; 0.01-1.5% Si; 0.01-1.0% Mn; 5.0-15.0% Co; 3.0-7.0% Cr; 13.0-20.0% Mo; 0.02-2.0% Nb and/or Ta. The steel may additionally contain up to 10.0% W and up to 5.0% V.

Abstract: Described herein is a ferritic chrome-molybdenum-nickel steel, containing specified amounts of niobium, zirconium and aluminum, of high chemical resistance against general and intercrystalline corrosion attack, as well as against pitting, crevice and stress corrosion in chloride-containing solutions. The described steel is useful for the fabrication of articles which must exhibit a 0.2-limit of at least 520 N/mm.sup.2 at room temperature; a notched bar impact strength of at least 40 J at 0.degree. C. and at least 70 J at 20.degree. C. in 3-mm U-notch impact specimens; and guaranteed for flat stock such as sheet or strip material up to at least 10 mm thickness and for bar material of at least 60 mm diameter, round of square.

Abstract: Parts made of a heat-treated alloy steel having a minimum tensile strength of 700 N/mm.sup.2 and a notch toughness of at least 55 joules, wherein the alloy steel is a Mn/Cr/Nb alloy steel of lower alloy content than has hitherto been used to provide the desired strength/toughness properties.