Steel rebar manufacturers | Dingding cold-rolled (certified) | rebar steel 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 as a construction steel, concrete structure incorporates national norms in these countries, cold-rolled ribbed steel bars have been widely used in construction, highways, airports, municipal, hydroelectric pipeline. 1994, the annual output of 4.5 million tons EC. In China's neighboring countries, Singapore and Malaysia have long been in the building and civil engineering works widely used rebar steel suppliers, the amount in Singapore using only cold-rolled ribbed steel bars in more than 150,000 tons. Mechanical properties of cold-rolled ribbed steel bars, largely depends on the chemical composition and mechanical properties of the base metal, cold-rolled ribbed steel bars, should give priority to high-speed control without twisting steel rebar wire shelf, because its chemical relatively stable composition and mechanical properties of steel rebar manufacturer, cross-sectional dimensions of consistency is also very good, as between the mechanical properties of the base material after the compression ratio to determine the cross-section and cold-rolled ribbed steel bar exists a good correlation, ie compression rate, the higher the intensity of the finished product, but lower elongation.