Steel commonly used classification in two ways: First, the geometry of the classification, according to the cross-sectional shape of the ribs and rib spacing or classify different type 7mm steel procurement, such as the British Standard (BS4449), the rebar points type Ⅰ, Ⅱ type. This classification performance of the main reaction clenched rebar. Second, the performance classification (class) 7mm steel production plant, such as the implementation of our current standard 7mm steel stock, rebar (G B1499.2-2007) wire for the 1499.1-2008), press the intensity level (yield point / tensile strength) will be divided into three grades of rebar. Rebar import and export: Import rebar cross-rib geometry of the main square of the ordinary or common rhombus screw thread. Cross rib geometry domestic rebar mainly spiral, herringbone, crescent three. Ordering principle of rebar is generally required to meet the engineering design clenched performance requirements, based on the mechanical process performance or mechanical strength index based. 7mm steel wholesale | Jiangsu 7mm steel | cold-Ding Ding Ding Ding Industrial Co., Ltd., Henan Province by. Ding Ding Industrial Co., Ltd., Henan Province (www.hnddsy.com) strong, credible, and other industries in other Anyang accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Dingding cold rolling and you hand into the brilliant, for a better future!