西安市场镀锌方管价格或小幅上涨厂家成交略有好…西安市场镀锌方管价格持稳。今天早盘期货大涨，唐山方坯累涨40元，现普碳方坯含税出厂4270元。现货市场今天价格持稳，成交略有好转。市场十家大户出货2600吨较昨日增700 吨。方管厂家挺价，方管厂家心态较好，降…

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. 

　　明日国内方管或将震荡运行为主现货供应偏紧方管价格窄幅震荡。今日小窄带开盘持稳，整体成交尚可，个别厂家出清日产。随着期货翻红，下游成交更加活跃，午间厂家纷纷追涨10元。经安复 产，小窄带资源充足。唐山窄带降10、中宽带持稳，周六上午发布11月钢铁PMI显…