重庆镀锌方管价格或小幅反弹厂家多快进快出为主…今日重庆镀锌方管市场价小幅下降。本地市场：期货方面，夜盘窄幅震荡，临近收盘小幅反弹，3632收盘，涨幅0.78%；现货方面小幅下降，成交较弱。市场观望情绪浓厚，谨慎补库，方管厂家多快进快出为主。消息面：为维…

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. 

　　潍坊方管价格或将以盘整观望为主厂家心态面多谨…潍坊方管价格暂稳。近日潍坊地区受阴雨天气的影响，市场成交偏弱，今日潍坊方管市场价格趋于稳定状态，贸易商方面主要以出货为主。据方管厂家方面反映，目前市场需求偏弱。目前8月份限产建议稿已出，由之前的限产50%调…