Steel-N.com : Our Products- Wire Rod - Manufacturing Facilities

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			Billet Conditioning To ensure high surface quality, wire rod surface is to be inspected and any defects, if found, are to be eliminated. After de-scaling with shot blast, billet surface is subject to magnetic particle testing and visual inspection for any defects. If found, defects are removed by a grinding machine. In addition, ultrasonic tests as well as specification and shape tests will follow in order to guarantee superior internal quality.
			Reheating Furnace The reheating temperature and time are strictly controlled to obtain proper quality in accordance with steel types and usage. In particular, to prevent decarburization which determines the surface quality, wire rod is preheated at a low temperature for a sufficient period of time before being rapidly switched over to hot temperature environment for rolling.
			Rolling To meet customers' demands, such conditions as rolling temperature, rolling reduction and rolling speed are rigorously controlled.
			Cooling POSCO produces steel that satisfies different demands made by customers by controlling recoiling temperature, air cooling speed, slow cooling cover and other cooling conditions. For example, in the case of high carbon wire rod, lead patenting is not necessary because rapid cooling makes fine grain structure, enhancing its freshness. As for low carbon alloy steel, the soaking-cooled steel helps our customers avoid the softening annealing process.
			Inspection Test pieces are collected from cooled rods and the samples undergo several tests involving specifications, surface conditions and other qualities. POSCO manages the entire process, ranging from packaging and labeling to shipment.