Sandborn is a town in Vigo Township, Knox County, Indiana, United States. The population was 415 at the 2010 census. It is the home of the annual Black Creek Festival. Its only business is AKB oil, once known as the Blue Jay Junction.
Large furnaces melt the iron and stay at temperatures ranging 2,600 to 2,800 degrees Fahrenheit. Computerized systems constantly monitor temperature. As the iron travels down the molding line, the temperature gradually decreases from about 2,600 to 1,200 degrees. As the castings cool, they enter a shakeout process in which the molds are shaken off and the sand is recycled for reuse. When castings get below about 140 degrees, they are cleaned and finished.
The austenizing temperature, the temperature where a steel transforms to an austenite crystal structure, for steel starts at 900 Â°C (1,650 Â°F) for pure iron, then, as more carbon is added, the temperature falls to a minimum 724 Â°C (1,335 Â°F) for eutectic steel (steel with only .83% by weight of carbon in it).