方管和矩形管冷弯成型时不同的特点方管冷弯方管、冷弯矩形管是通过外辊与管坯外壁的单向接触形成弯矩使带料弯折,冷弯会使弯折线产生压缩,压缩效应使弯折线纵向伸长,弯折处金属出现堆积变厚,这就是冷弯的压缩/增厚效应。Cold-formed square pipe and cold-formed rectangular pipe bend the strip through the unidirectional contact between the …

南京市场方管价格上涨，成交尚可。早盘螺纹钢期货延续夜盘强势上涨。唐山方坯累涨20元，现普碳方坯含税出厂3580元。期螺的大 涨也拉动了现货，南京市场价格多次跟涨，成交也相对顺畅。整体来看，需求对价格依然有很好的支撑，但是高价资源成交仍然较弱。不过由于期螺和钢坯的上涨， 钢厂涨价意愿强烈。综上所述，预计明日南京市场方管价格或持续上涨。

Nanjing market manages the price to rise, the transaction is still acceptable. Early-trading threaded steel futures continued the strong rise of the night market. Tangshan billet has risen by 20 yuan, and now ordinary carbon billet has been discharged with tax of 3580 yuan. The sharp rise of futures snails has also stimulated the spot market. Nanjing market prices have been rising many times, and transactions have been relatively smooth. Overall, demand still has a good support for prices, but the transaction of high-price resources is still weak. However, due to the rise of snails and billets, steel mills are willing to increase prices. To sum up, it is expected that prices will continue to rise in Nanjing market tomorrow. 价格方面：截止发稿时，永钢、沙钢三级大螺纹4270元(吨价，下同)，涨40元。

Price: Up to the time of submission, Yonggang and Shagang three-level large threads 4270 yuan (ton price, the same below), up 40 yuan.

短期镀锌方管价格继续盘整运行市场心态偏疲…方管国内镀锌方管价格持续阴跌。据兰格钢铁云商平台监测数据显示：国内重点城市4寸(3.75mm)方管的平均价格为4158元，比昨日价格下跌8元，其中中心城市报价天津下调20元、唐山下调20元、西安下跌20元、北京下跌20元，其他中心城市暂与昨日持平。早盘，145小窄带价格累降30元，市场交投氛围较差，午前瑞丰带钢价格继续下调，津冀地… 唐山方管价格将延续稳中偏弱格局整体成交一…方管唐山方管市场价格稳中偏弱运行。周末受钢坯下跌影响，唐山方管价格普遍小降10-20元，今日早盘价格主稳，但成交弱，盘中部分降价走货，截止16点统计唐山23家方管厂共出货 35860吨，整体成交一般，个别尚可，工字钢7家7600吨，槽钢12家15100吨，角钢5家13160吨。午后钢坯价格持稳，期螺宽幅震荡，市场走势趋稳， 但鉴于需求有限…