Cold-rolled ribbed steel bars report Dingding Industry (certified), Jiangxi cold-rolled ribbed steel bars supplied 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. Grade steel called cold-rolled ribbed steel rebar report is for each specific steel products taken from the name of cold-rolled ribbed steel bars, steel is that people understand a common language. Cold-rolled ribbed steel grades by the CRB and constitute the minimum tensile strength of steel. C, R, B, respectively, for cold-rolled (Cold-rolled), ribbed (Ribbed), steel (Bars) the first three words of the English alphabet. Cold-rolled ribbed steel bars into CRB550, CRB650, CRB800, CRB970 and CRB1170 five grades. CRB550 ordinary reinforced concrete with steel cold-rolled ribbed steel gauge, other grades for prestressed concrete reinforcement. Admission test production of cold rolled ribbed steel cold rolled ribbed steel bars, after inspection before use. Inspection by the same factory, same brand, same size as a group, and each batch weighing not more than 10t. First for visual quality inspection, testing surface cold-rolled ribbed steel bars should have defects such as cracks, folds, scars, indentation, mechanical damage or other effects used; then rolled flat measuring its thickness, pitch, weight deviation .