乐从方管主流价格或稳中震荡厂家出货心态为主今日乐从方管价格偏弱调整，市场方面，唐山钢坯涨20报3330元/吨含税出厂，期卷偏弱震荡，市场出货心态为主，今乐从方管偏弱调整，主流规格价格在3680元/吨，现与天津主流规格报价相差0元/吨，与上海主流报价相差…

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. 

　　西安市场方管价格基本持稳需求持续低迷西安市场方管价格基本持稳，成交一般。今日外围邯郸市场价格下跌20元报3780元/吨，成交一般。反观西安，方管价格稳报3900元/吨，与昨日价格相比持平。近期由于西安方管市场需求持续低迷，方管厂家出货未见好转。目前，…