What is Realistic Fiction. Materials: Several fiction titles from realistic and fantasy genre. Vocabulary: Fiction, realistic, fantasy. Motivation: Engage studentsâ attention by asking the following questions:
Heat number. An example of a heat number on a plate. A heat number is an identification coupon number that is stamped on a material plate after it is removed from the ladle and rolled at a steel mill. Industry quality standards require materials to be tested at the manufacturer and the results of these tests be submitted through a report, also called a Mill Sheet, Mill Certificate or Mill Test Certificate (MTC).
Furnaces for steel tempering and quenching. When non-alloy steel is hardened, the work piece is at first heated to a temperature between 800C and 900C until, in case of steel with low carbon proportion, pure austenite is left. For alloyed steel, temperature can vary significantly. In order to avoid corrosion; exothermic gas can be used inside the furnace.