Gongyi City Huarui Heavy Industry Machinery Manufacturing Co.,Ltd.independent research development the costal cold rolling mill(underside cold rolling mill), using active costal forming high frequency quenching technology,the products can be comparable with HRB400 steel,Appearance of the product was blue-black,thread is clear and full ,yield strength and elongation are superior to ordinary cold-rolled ribbed steel bar and HRB400,500MPa high strength steel completely conform to the requirements of the building needs. My company produces the costal cold rolling mill can be divided into small costal cold rolling mill, medium-sized and large costal cold rolling mill,CAN meet the different needs of customers.