How to Buy Iron and Steel Materials: A Few Suggestions to Those Interested in the Purchasing of Iron and Steel (Classic Reprint)

Generally speaking, steel is divided into two classes, that is: Carbon Steel and Alloy Steel. Carbon Steel is the common commercial grade, the properties of which depend mainly on the percentage of carbon it contains, together with the percentage of such other metals and metaloids as: Manganese, Phosphorus, Silicon andS ulphur. Alloy Steel shows, besides carbon, a certain proportion of such alloys as: Nickel, Chromium, Tungsten, Manganese, Vanadium, etc., all of which have their effect upon the hardness, strength and toughness of the steel. Ordinary Commercial or Carbon Steel is designated in the mar, ket under various names, such as, Mild orS oft, Medium, Hard Steel, etc., but the following are recognized official trade names forS teel: {A) Mild orS oft Bessemer Steel showing carbon not over 15%. Mild orS oft Open Hearth Steel with carbon not over 25%. Dead Soft Open Hearth Steel with not over 15% carbon. (B) Medium Grade Steel used for structural purposes showing Carbon from 0.30 to 0.40, with tensile strength from 60,000 to 70,000 lbs. (C) Hard Steel shows carbon from .40 to .60 with tensile strength from 70,000 to 90,000 lbs., per square inch.
(Typographical errors above are due to OCR software and don't occur in the book.)

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