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　　目前鋼材市場(chǎng)上的偽劣熱軋帶肋鋼筋不合格因素主要是：實(shí)際尺寸比名義尺寸小超出標(biāo)準(zhǔn)。強(qiáng)度偏低?；瘜W(xué)成份不合格率高。究其原因主要是小軋鋼廠原料不合格，用土煉鋼坯軋制螺紋鋼所致。
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.
　　在購(gòu)買螺紋鋼時(shí)，首先從外觀尺寸看，可用游標(biāo)卡量具簡(jiǎn)單測(cè)量實(shí)際尺寸是否比標(biāo)明尺寸，一般螺紋鋼上均軋有規(guī)格標(biāo)志，小約一個(gè)規(guī)格左右或更多，如12螺紋鋼標(biāo)準(zhǔn)內(nèi)徑為11.5±0.4mm，而偽劣螺紋鋼內(nèi)徑大多為10mm左右。同時(shí)有些偽劣螺紋鋼通過軋扁的方式來(lái)欺騙人的視覺，因而從鋼筋端面觀察其為扁橢圓形，而正規(guī)材端面應(yīng)基本為圓形。
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.

　　從表面質(zhì)量看，偽劣螺紋鋼由于用土坯軋制，其表面質(zhì)量差，常帶有結(jié)疤等缺陷，有整體粗糙感。同時(shí)有些小軋廠由于加熱溫度、軋制速度不夠，表面顏色偏紅，正規(guī)鋼材在廠家出廠時(shí)大多大捆包裝，成捆鋼材上均掛有與實(shí)物相對(duì)應(yīng)的金屬標(biāo)牌，標(biāo)明廠家、鋼材牌號(hào)、批號(hào)、規(guī)格及檢驗(yàn)代號(hào)等。而偽劣鋼筋由于生產(chǎn)條件簡(jiǎn)陋，無(wú)大型吊裝設(shè)備，大多小捆包裝或散裝，無(wú)金屬標(biāo)牌、無(wú)質(zhì)量保證書。當(dāng)然要根本避免買到偽劣鋼筋，還是到名牌廠商的直接代理商處購(gòu)買。
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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