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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]
Mar. 3—Editor's note: This story first published on Dec. 8, 2019, following the announcement of Cleveland-Cliffs' acquisition of AK Steel. It is being republished because of news this week that ...
AK Steel answered the complaint and filed counterclaims (AK Steel Corp. v. AEIF, Case No. 1:05-CV-531) on November 2, 2005. [38] On March 1, 2006, AK Steel began a lockout of about 2,700 workers at the Middletown Works plant in Middletown, Ohio. [39] By the next day, the mill was operated by 1,800 salaried and temporary replacement workers.
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 ...
It was acquired by Armco Steel in 1930 which expanded it in 1945. At its peak it was one of Kansas City's largest employers with more than 4,500 employees. [ 4 ] Operating as Armco Worldwide Grinding System , it was sold in 1993 to GS Technologies which then became GST Steel Company.
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]
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.
Metric threaded rods are marked on the end with a color code to define the ISO strength class. The color codes are: [9] Unmarked — 4.6 class (tensile strength = 400 N/mm 2, yield strength 240 N/mm 2) Yellow — 8.8 class (800 N/mm 2, 640 N/mm 2) Green — A2 stainless steel (304) Red — A4 stainless steel (316) White — 10.9 class (1000 N ...