近日国内脚手架市价稳中盘整运行需求量依然较少…脚手架各地区市场价格稳中有跌，需求偏弱。近日鞍钢普碳脚手架出厂价出现上调，市场鞍钢资源市价趋强，临沂管厂方面，实际接单价个别管厂有小幅上调10-30元，管坯实际接单量有所增长。 虽然涨价消息满天飞但是脚…

脚手架在使用状态下以铁素体组织为主的叫合金脚手架。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。这类合金脚手架存在塑性差、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. 

　　移动脚手架脚轮在选择时需要注意哪些事项？脚轮是挪动脚手架的一个重要的配件，脚轮的好坏直接影响到挪动脚手架在实际使用中的作用和感触，那么脚轮的选购应该注重哪些方面呢？选购脚轮需注重以下几个方面：1．移动脚手架的轮子材质：这个很重要，一般有PU,TPR…