Cold-rolled ribbed steel cold rolling plant _ Dingding (certified) _ Jiangsu rolled ribbed steel bar provided by Ding Ding Industrial Co., Ltd., Henan Province. Ding Ding Industrial Co., Ltd., Henan Province (www.hnddsy.com) is a professional enterprise, "cold-rolled ribbed steel CRB550", the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Liu. Cold-rolled ribbed steel nominal diameter range: CRB550 steel nominal diameter range of 4mm ~ 12mm. CRB650 above grade steel and a nominal diameter of 4mm, 5mm, 6mm. Cold-rolled ribbed steel coiled length of steel is usually delivered by, CRB550 steel can also be straight delivery. When reinforced by straight delivery cold-rolled ribbed steel manufacturer, its length and tolerance by both parties through consultation. Reinforced by the production process points: hot-rolled, cold-rolled, cold-drawn steel cold-rolled ribbed steel wire rod, as well as to Ⅳ grade heat-treated steel made of heat-treated steel, higher strength than the former. According to the role in the structure of the points: compression reinforcement, tensile reinforcement, erect steel, distribution of steel bars, stirrups and so on. Many different types of steel, usually by the production process according to the role in the structure of the use of sub-classification.