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.
广州当地方管价格或持续维稳运行成交弱于昨…方管广州市场方管价格以稳为主。今日期螺震荡盘整小幅收红,原材料方面现昌黎普碳方坯含税出厂3550涨10。今日广州方管市场成交普 遍弱于昨日,一方面受阴雨天气影响,另一方面也缺乏有力需求支持;现处于供给强于需求,市场对后市普遍不太看好,期货钢坯的小幅震荡难以提振市场的信心。 并且进入六月份整个市场资金压力在明显变大… 无锡地区方管价格下调受贸易战影响不大方管无锡方管市场价格与上周同期跌50元。受中美贸易战升级影响,无锡地区方管价格下调,出货量维持在1500吨左右,部分有出口贸易的贸易商出口业务受到一定程度的影响。截至5月10日,山东108*4.5报价4600元;兴亚38*3.5报价5600;华润108*4.5报价5050元;天淮426*11报价5300元。无锡方管价格较上周跌50元。The market price of Wu…
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