目前钢材市场上的伪劣热轧带肋钢筋不合格因素主要是：实际尺寸比名义尺寸小超出标准。强度偏低。化学成份不合格率高。究其原因主要是小轧钢厂原料不合格，用土炼钢坯轧制螺纹钢所致。
The main reason for the disqualification of the fake hot rolled rib in the steel market is that the actual size is smaller than the nominal size. Low intensity. The chemical composition is not high. The main reason is that the raw materials of small rolling mills are not qualified, and they are caused by rolling steel of clay steel.
　　在购买螺纹钢时，首先从外观尺寸看，可用游标卡量具简单测量实际尺寸是否比标明尺寸，一般螺纹钢上均轧有规格标志，小约一个规格左右或更多，如12螺纹钢标准内径为11.5±0.4mm，而伪劣螺纹钢内径大多为10mm左右。同时有些伪劣螺纹钢通过轧扁的方式来欺骗人的视觉，因而从钢筋端面观察其为扁椭圆形，而正规材端面应基本为圆形。
When buying rebar, first of all, from the appearance size, use cursor card simple measuring tool measuring whether than indicate the size, actual size are rolling on general rebar specifications marks, small about a specification or more, such as 12 rebar diameter is 11.5 + / - 0.4 mm, but most and inferior rebar diameter is about 10 mm. At the same time some fake rebar flattening ways to cheat people of vision, thus from reinforced as flat oval face observation, and the formal end should be basic on circular.

　　从表面质量看，伪劣螺纹钢由于用土坯轧制，其表面质量差，常带有结疤等缺陷，有整体粗糙感。同时有些小轧厂由于加热温度、轧制速度不够，表面颜色偏红，正规钢材在厂家出厂时大多大捆包装，成捆钢材上均挂有与实物相对应的金属标牌，标明厂家、钢材牌号、批号、规格及检验代号等。而伪劣钢筋由于生产条件简陋，无大型吊装设备，大多小捆包装或散装，无金属标牌、无质量保证书。当然要根本避免买到伪劣钢筋，还是到名牌厂商的直接代理商处购买。
From the surface quality, the fake and poor rebar is made of clay, and its surface quality is poor, often with the defects such as scarring, and it has the overall rough feeling. At the same time, some small rolling mill owing to lack of heating temperature, rolling speed, the surface color slants red, regular steel manufacturers factory in most large bundle packing, bundles are hanging on the steel with a corresponding to the physical metal panels, indicate the factory, steel grades, batch number, specification and test code, etc. The fake and inferior steel rods, due to poor production conditions, have no large hoisting equipment, mostly small bundles or bulk, no metal signs, no quality guarantee. Of course, you should avoid buying fake and inferior bars at all, or buying from a direct agent at a well-known manufacturer.
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