浅谈螺纹钢原材料规格及外观质量发布时间：2018-4-13 10:21:49 浏览次数:452
Specifications: the specification requirements for rebar should be listed in the import and export trade contract. Generally, it should include the standard grades (type code), the nominal diameter of the steel bar, the nominal weight (quality), the specified length and the allowable difference of the above indexes. The recommended standard diameter is 6, 8, 10, 12, 16, 20, 25, 32, 40 and 50mm of rebar series. The  supply length is divided into two kinds of ruler and ploidy. The selection range of the fixed length of China's export screw steel is 6 ~ 12M, and the selection range of the fixed length of the Japanese whorled steel is 3.5 ~ 10m, and the domestic domestic pin steel usually has two lengths of 9m and 12M, if it is not specified in the contract.
Appearance quality: surface quality. The surface quality of the screw steel is stipulated in the relevant standards, and the end should be cut straight, the surface should not have cracks, scars and folding, and the harmful defects in the use should not exist. Allowable value for deviation of shape and size. Requirements for bending and reinforcement geometry of threaded steel are specified in relevant standards. If the standard of our country stipulates, the bending degree of straight bar shall not affect normal use, the total bending degree is not greater than 0.4% of the total length of reinforcing steel bar.