二級(jí)鋼筋停產(chǎn)的消息一經(jīng)放出來(lái)很久了,從當(dāng)前的實(shí)施情況來(lái)看,全國(guó)范圍內(nèi)一經(jīng)有大部分的地區(qū)已經(jīng)停止使用二級(jí)鋼筋,但是仍然有小的地區(qū)還在使用二級(jí)鋼筋,因此來(lái)看,當(dāng)前的二級(jí)鋼筋停產(chǎn)實(shí)施效果還是要有一段時(shí)間才能完全的實(shí)現(xiàn),所謂的二級(jí)鋼筋也就是HRB335鋼筋,其不論是從化學(xué)成分上還是從性能上都不及當(dāng)前推廣使用的三級(jí)鋼筋。但是其在上是要比三級(jí)鋼筋便宜。
The news of the discontinuation of the production of secondary reinforcement has been released for a long time. From the current implementation situation, the use of secondary reinforcement has been stopped in most areas of the country, but there are still small areas using secondary reinforcement. Therefore, the current implementation effect of the discontinuation of production of secondary reinforcement still needs a period of time to be fully realized. The so-called secondary reinforcement is H. RB335 reinforcing bar is inferior to the three-grade reinforcing bar in chemical composition and performance. But it is cheaper than the third grade steel bar in price.
與二級(jí)鋼筋相比較,三級(jí)鋼筋還是具有比較強(qiáng)的高度、韌性、焊接性能以及抗震性能的優(yōu)點(diǎn),此外用三級(jí)鋼筋替代二級(jí)鋼筋也是可以降低鋼材的消耗,節(jié)約鐵礦石、焦炭、電力的使用量,減少二氧化碳、廢氣、粉塵的排放量。所以,從這方面的利好因素來(lái)看,二級(jí)鋼筋停產(chǎn)也是勢(shì)在必行的事情。
Compared with the second-grade steel bar, the third-grade steel bar still has the advantages of relatively strong height, toughness, weldability and seismic performance. In addition, replacing the second-grade steel bar with the third-grade steel bar can also reduce the consumption of steel, save the use of iron ore, coke, electricity and reduce the emission of carbon dioxide, waste gas and dust. Therefore, from the perspective of the favorable factors in this respect, it is imperative to stop production of secondary reinforcement.
從近幾年的走勢(shì)行情分析來(lái)看,我國(guó)的高強(qiáng)度鋼筋產(chǎn)量和應(yīng)用在逐年的提高,但是進(jìn)展也不算快,從市場(chǎng)分析的結(jié)果來(lái)看,我國(guó)建筑用鋼筋有百分之六十采用的二級(jí)螺紋鋼,三級(jí)螺紋鋼筋和其以上的鋼筋也只占百分之三十左右。過(guò)國(guó)外高強(qiáng)鋼筋使用還是比較普遍的,用量一般在70%-80%,其中以400兆帕左右的鋼筋為主的。

According to the trend analysis in recent years, the output and application of high-strength steel bars in our country are increasing year by year, but the progress is not fast. According to the results of market analysis, 60% of the construction steel bars in our country are secondary screw steel, and only about 30% are tertiary screw steel bars and above. Overseas use of high-strength steel bars is relatively common, the amount is generally 70% - 80%, of which 400 MPa of steel bars are the main.
整體上分析來(lái)看,二級(jí)鋼筋停產(chǎn)終結(jié)果還是還是需要有一個(gè)適應(yīng)的過(guò)程,靠單一的禁止市場(chǎng)銷售來(lái)控制,顯然也并不現(xiàn)實(shí),關(guān)鍵點(diǎn)還是要從各大鋼廠研究入手,只有鋼廠不再生產(chǎn)二級(jí)鋼筋,那即便是工程師設(shè)計(jì)圖紙中出現(xiàn)二級(jí)鋼筋也并無(wú)從入貨。這才能大程度上斷掉市場(chǎng)的需求。
On the whole, the final result of the discontinuation of secondary reinforcement still needs an adaptive process. It is obviously unrealistic to control it by a single prohibition of market sales. The key point is to start with the research of major steel plants. Only steel plants do not produce secondary reinforcement anymore. Even if secondary reinforcement appears in engineer's design drawings, it will not be available for purchase. Only in this way can market demand be cut off to the greatest extent.
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