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Spring steel is a name given to a wide range of steels [1] used in the manufacture of different products, including swords, saw blades, springs and many more. These steels are generally low-alloy manganese , medium-carbon steel or high-carbon steel with a very high yield strength .
Polyethylenimine (PEI) or polyaziridine is a polymer with repeating units composed of the amine group and two carbon aliphatic CH 2 CH 2 spacers. Linear polyethyleneimines contain all secondary amines, in contrast to branched PEIs which contain primary, secondary and tertiary amino groups.
Buckeye Steel Castings was a Columbus, Ohio steelmaker best known today for its longtime president, Samuel P. Bush, who was the grandfather of President George H. W. Bush and great-grandfather of President George W. Bush. Buckeye, named for the Ohio Buckeye tree, was founded in Columbus as the Murray-Hayden Foundry, which made iron farm implements.
Main Office of Lukens Steel. Lukens Steel Company, located in Coatesville, Pennsylvania, is the oldest iron mill in commission within the United States.. In 1995, it was one of the three largest producers of plate steel and the largest domestic manufacturer of alloy-plate.
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The group also has several service units in the roofing, security gate systems, and steel I-beam markets. While the holding company resides in Columbus, the units operate in many other locations including: Columbus, Wilmington , and Mason, Ohio and Atlanta, Georgia .