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08.02.2025
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08.02.2025
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06.02.2025
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04.02.2025
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03.02.2025
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31.01.2025
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30.01.2025
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29.01.2025
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Heat-resisting Steels

Aero engine valves, furnace conveyers, retorts, oil cracking units and gas turbines, need a wide variance of state entailing heat and corrosion under both static and dynamic stresses. Three necessary properties in material used at elevated temperatures: Retention of strength at the working temperature Resistance to oxidation and to scaling. Structural stability as regards carbide […]

Forging

Forging the oldest method of metal forming, and it was the first of the indirect compression-type process. It involves the application of a compressive stress, which exceeds the flow stress of the metal. Factors as whether ease and cheapness of deformation, production of certain mechanical properties or surface finish is the overriding factor to choice […]

Factors Influencing Steelwork Prices

There is a wide range of factors that power tender prices for structural steelwork. In general the factors are either ���commercial��� or "technical���. Best practice guidance is given below on the key factors, together with information on ���lead times���, erection times and typical prices. Commercial Factors The following are profitable factors that should be considered […]

Classification of Stainless Steel

Martensitic( A solid solution of iron and up to 1 percent of carbon, the chief constituent of hardened carbon tool steels) stainless steels, ferritic stainless steels, austenitic stainless steels, duplex (ferritic-austenitic) stainless steels, and precipitation-hardening stainless steels, are the five groups of steel. Plate, sheet, strip, foil, bar, wire; semi-finished products, pipes, tubes, and tubing […]

Nickel and Nickel Alloys

Nickel is a versatile element and will alloy with most metals. Complete solid solubility exists between nickel and copper. Wide solubility ranges between iron, chromium, and nickel make possible many alloy combinations. Nickel has been used in alloys from dawn of civilization. And has made significant contributions to our present-day society and promises to continue […]

Molten Light Metal Processing-I

In the melting of commercial non-ferrous metals and alloys (aluminum, magnesium, copper, zinc, and lead), various additional molten metal processing steps are necessary other than melting and alloying. The historic practices of fluxing, metal refining deoxidation, degassing, and grain refining have been used, and they apply to virtually all nonferrous metal systems. In addition, molten […]

Melting and Pouring of the Reactive Metals

Traditional Titanium (Reactive metals) Casting A very reactive metal in the molten state, titanium must be melted and poured in a vacuum to yield a quality casting. Most titanium investment cast parts are made with the vacuum arc remelting (VAR) technique, which uses a vacuum arc furnace to melt a portion of a titanium electrode […]

Magnesium and Magnesium Alloys

Because of their high strength-weight ratios, excellent mach inability, and relatively low cost on a piece basis, Magnesium alloys are utilized in engineering design mainly. The specific gravity of magnesium is 1.74, making it the lightest structural metal. Magnesium alloys weigh about 0.064 to 0.067 pound per cubic inch as against approximately 0.091 to 0.108 […]