Calculate the plastic moment strength about the strong axis of a built-up I-beam with flange plates 190 mm wide, 11 mm thick and web plate 270 mm wide, 6 mm thick.  Use A992 steel.  Write your final answer in two decimal places in the unit of kN-m. Answer: 240.34

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Types and properties of steel

Steel is an alloy of iron. It is formed by heating iron and combining carbon (0.1-1.7%) with it and minor amounts of other elements such sulfur,  chromium, manganese, nickel, etc. Thousands of steel grades have been published, registered, or regulated around the world, each with its chemical composition, and special numbering systems have been devised in various countries to classify the vast number of alloys.