Jiangsu Nantong crb550crb800 supply cold-rolled ribbed steel bars |. Xun Ding reinforcement mesh national grain sales hotline 15132858566, QQ874278773 three, CRB800 cold rolled ribbed bar -CRB550 -CRB800 cold-rolled ribbed steel reinforcement bars -CRB550 received these days Several Nantong side of the inquiry, most of the clients are the first contact with this thing, do not even know CRB800, CRB550 What does it mean, following on from the small series to tell you about it. ???? First CRB's first talk about the meaning of it, CRB is translated from the English over the acronym, "C" means cold rolling, "R" means ribbed, is the so-called ribbed threaded means, generally three thread, "B" means that steel, CRB behind the numbers 800 and 550 refer to the tensile coefficient steel, cold-rolled ribbed steel tensile strength CRB800 requirements of greater than or equal 800Mpa, anti CRB550 cold-rolled ribbed steel bars Pull strength requirements than or equal 550Mpa. In true among construction, test data is not just only this one, the construction side will detect the elongation of steel, tensile properties, flexural properties, CRB550 steel test items are relatively small, ordinary-level steel material after Q235 cold rolling thread basic can be up to standard. The price is relatively low. CRB800 CRB550 steel and tensile strength of steel, although similar, but use very different raw materials, steel is not a common way to achieve 800Mpa tension, so fast tripod Mesh Products Co., repeated the experiment many times the production and testing success CRB800 steel, using excellent special steel, tensile strength can be achieved 1050mpa, has been well used in the construction of grain storage construction in Shandong, Jiangsu, Chongqing and other places in the testing have reached the national standard, it has a very Good seismic reinforcement function, strength, CRB800 steel is a high strength steel, generally applies to large span prestressed support above. I do not know the explanation would not be too bad mess, Tell me what you make do and see, limited skills. Or if you have CRB800 CRB550 reinforced this need can contact me on my mobile phone. Contact: Amy - phone 1513285866, QQ874278773 The company conventional product specifications are as follows: Specification diameter shape production standards CRB550 3--12 rod straight, thread GB13788-2008 CRB650 5 6 CRB800 3-12mm threaded rod products Performance Grade Mpa elongation of not less than,% not less than 180 ° bending test repeated bending frequency relaxation rate, the initial stress 1000h,% not more than 10h, no more than CRB550 550 8.0 ----- D = 3d ----- - --- ----- CRB650 650 ----- 4.0 ----- 3 8 5 CRB800 800 ----- 4.0 ----- 3 8 5 CRB970 970 ----- 4.0 - --- 3 8 5 CRB1170 1170 ----- 4.0 ----- 3 8 5