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Nitronic alloys were developed by Armco Steel. The first of these alloys, Nitronic 40, was introduced in 1961. [1] Since 2022, the trademark has been owned by Cleveland-Cliffs Steel Corp., successor to AK Steel. [2] Electralloy is the licensed producer in North America for a wide range of Nitronic products. [3]
In the era of commercial wrought iron, blooms were slag-riddled iron castings poured in a bloomery before being worked into wrought iron. In the era of commercial steel, blooms are intermediate-stage pieces of steel produced by a first pass of rolling (in a blooming mill) that works the ingots down to a smaller cross-sectional area, but still greater than 36 in 2 (230 cm 2). [1]
AK Steel answered the complaint and filed counterclaims (AK Steel Corp. v. AEIF, Case No. 1:05-CV-531) on November 2, 2005. [39] On March 1, 2006, AK Steel began a lockout of about 2,700 workers at the Middletown Works plant in Middletown, Ohio. [40] By the next day, the mill was operated by 1,800 salaried and temporary replacement workers.
Early in the 1900s, prior to the formation of the MBMA, metal beams and panels were used for garages with small structures and were advertised for sale in publications such as the Saturday Evening Post. The first standing seam metal roof [3] was introduced by Armco Steel Corp at the 1934 Century of Progress Exposition in Chicago. The use of pre ...
This page was last edited on 15 July 2023, at 20:39 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
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Permendur rods. Permendur is a cobalt-iron soft ferromagnetic alloy with equal parts of cobalt and iron which is notable for its high magnetic saturation level. [1] [2] Its saturation flux density of around 2.4 tesla is the highest of any commercially available metal.
Ingot molds are tapered to prevent the formation of cracks due to uneven cooling. A crack or void formation occurs as the liquid to solid transition has an associated volume change for a constant mass of material. The formation of these ingot defects may render the cast ingot useless and may need to be re-melted, recycled, or discarded.