预计明日包头方管价格稳或窄幅震荡市场心态低迷…包头方管市场价格跌涨不一，今晨钢坯涨10元，受期螺走低运行，市场心态低迷，由于市场缺货方管厂家陆续到货。成交状态短暂得到释放。但是并没有带动 整体市场成交热度，亚新厂暂未复产，部分缺货规格货少价高，市…

方管在使用状态下以铁素体组织为主的叫合金方管。含铬量在11%~30%，具有体心立方晶体结构。这类钢一般不含镍，有时还含有少量的Mo、Ti、Nb等到元素，这类钢具导热系数大，膨胀系数小、抗氧化性好、抗应力腐蚀优良等特点，多用于制造耐大气、水蒸气、水及氧化性酸腐蚀的零部件。这类合金方管存在塑性差、焊后塑性和耐蚀性明显降低等缺点，因而限制了它的应用。炉外精炼技术（AOD或VOD）的应用可使碳、氮等间隙元素大大降低，因此使这类钢获得广泛应用。

The square tube is called alloy square tube, which is mainly composed of ferrite in service state. The chromium content ranges from 11% to 30%. It has a body-centered cubic crystal structure. This kind of steel generally does not contain nickel, and sometimes contains a small amount of Mo, Ti, Nb and other elements. This kind of steel tool has the characteristics of high thermal conductivity, small expansion coefficient, good oxidation resistance and excellent stress corrosion resistance. It is mostly used to manufacture parts resistant to atmospheric, steam, water and oxidative acid corrosion. This kind of alloy square pipe has some shortcomings, such as poor plasticity, obvious decrease of post-weld plasticity and corrosion resistance, which limits its application. The application of out-of-furnace refining technology (AOD or VOD) can greatly reduce the gap elements such as carbon and nitrogen, thus making this kind of steel widely used. 

　　预计明日国内方管市场价格窄幅调整出货有所上升…方管市场价格主稳个调。今晨受夜盘期货下跌运行的影响，今日开市，国内方管市场主流价格部分下调，但盘中随着期货震荡走高，钢坯涨20元，市场需求有所回暖。刺激了一定 的需求，出货有所上升。北方地区方管价格波动不…