JFE Steel to Market New High Tensile Plate for Machinery

JFE Steel announced on Wednesday the firm started the sample shipment of new ultra high tensile steel plate for construction machinery, JFE-HYD1100LE, which the firm developed by utilizing online heat treatment on line process or HOP. The firm tries to market the original product, which has more than 1,100 mega pascal of yield strength and more than 1,180 mega pascal of tensile strength with higher resistance for delayed cracking along with toughness in minus 40 degrees of centigrade and weldability, for offshore large crane makers. The firm developed the new plate with ultra fine metallographic structure by utilizing ausforming through better rolling and cooling and rapid heat treating through HOP. The plate has better low temperature toughness and resistance for delayed cracking. The firm also improved the weldability by reducing alloy compared with traditional materials. The firm operates HOP, which is the world first process for continuous heat treatment on rolling line, at Fukuyama of West Japan works since May 2004. The induction heater can heat materials up to 50 times faster than traditional heat furnace. The firm developed JFE-HITEN780LE with 780 mega pascal of tensile strength and JFE-HYD960LE with 960 mega pascal of yield strength when construction machinery makers need steel with higher strength and lighter weight parts. The firm already produced total 100,000 tonnes of those HOP technology using products.