Wednesday, November 10, 2010

Ship Steel, a good steel with corrosion resistance, suitable for rerolling

http://sify.com/finance/code-of-conduct-for-ship-breaking-yards-news-default-kk0aOOgbifj.html

Code of conduct for ship-breaking yards
Over 65 per cent of steel recovered from a condemned ship comes good for rerolling. But why so? This is because rerolling of ship plates require reheating of only up to 1,000 degree centigrade and that greatly restricts scale formation. Ship steel, as rerollers say, has fine grains giving it a good corrosion resistance character. A steel ministry paper says shapes and sections rerolled from ship steel are largely immune from physical defects like seams, internal cracks and furnace burns. Rebars made from low ductility ship steel lend themselves well to intensive cold twisting. Ship steel not found good for rerolling goes for melting

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