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1391919181920号(Hao)无(Wu)缝(Feng)钢(Gang)管(Guan)是(Shi)一(Yi)直(Zhi)运(Yun)用(Yong)很(Hen)广(Guang)泛(Fan)的(De)管(Guan)材(Cai),多(Duo)是(Shi)用(Yong)于(Yu)输(Shu)送(Song)液(Ye)体(Ti)或(Huo)是(Shi)其(Qi)他(Ta)的(De)管(Guan)道(Dao),如(Ru)石(Shi)油(You)、(?)煤(Mei)气(Qi)、(?)天(Tian)然(Ran)气(Qi)等(Deng)等(Deng),而(?)某(Mou)些(Xie)加(Jia)工(Gong)方(Fang)面(Mian)也(Ye)会(Hui)用(Yong)到(Dao)无(Wu)缝(Feng)钢(Gang)管(Guan),如(Ru)自(Zi)行(Xing)车(Che)架(Jia)、(?)汽(Qi)车(Che)传(Chuan)动(Dong)轴(Zhou)等(Deng)等(Deng),今(Jin)天(Tian),就(Jiu)给(Gei)大(Da)家(Jia)具(Ju)体(Ti)讲(Jiang)一(Yi)讲(Jiang)什(Shi)么(Me)是(Shi)20#无(Wu)缝(Feng)钢(Gang)管(Guan). (?) (?)什(Shi)么(Me)是(Shi)20#无(Wu)缝(Feng)钢(Gang)管(Guan)?这(Zhe)个(Ge)20#是(Shi)什(Shi)么(Me)意(Yi)思(Si)?无(Wu)缝(Feng)钢(Gang)管(Guan)厂(Chang)给(Gei)大(Da)家(Jia)做(Zuo)出(Chu)讲(Jiang)解(Jie): (?) (?)20#是(Shi)20钢(Gang)的(De)简(Jian)易(Yi)写(Xie)法(Fa),属(Shu)钢(Gang)材(Cai)中(Zhong)的(De)一(Yi)种(Zhong)材(Cai)质(Zhi).常(Chang)用(Yong)于(Yu)制(Zhi)造(Zao)无(Wu)缝(Feng)钢(Gang)管(Guan),模(Mo)具(Ju),优(You)质(Zhi)碳(Tan)素(Su)钢(Gang)板(Ban),槽(Cao)钢(Gang),工(Gong)字(Zi)钢(Gang)等(Deng)钢(Gang)材(Cai). (?) (?)此(Ci)种(Zhong)材(Cai)质(Zhi)中(Zhong)碳(Tan)的(De)含(Han)量(Liang),大(Da)概(Gai)在(Zai)0.2%左(Zuo)右(You).此(Ci)种(Zhong)材(Cai)质(Zhi),相(Xiang)对(Dui)于(Yu)其(Qi)他(Ta)的(De)优(You)碳(Tan)钢(Gang),也(Ye)较(Jiao)普(Pu)遍(Bian). (?) (?)20钢(Gang):平(Ping)均(Jun)含(Han)碳(Tan)量(Liang)为(Wei)0.17-0.23%,平(Ping)均(Jun)含(Han)硅(Gui)量(Liang)为(Wei)0.17-0.37%, (?) (?)平(Ping)均(Jun)含(Han)锰(Meng)量(Liang)为(Wei)0.35-0.65%,平(Ping)均(Jun)含(Han)硫(Liu)量(Liang)≤(?)0.035%,平(Ping)均(Jun)含(Han)磷(Lin)量(Liang)≤(?)0.035%, (?) (?)平(Ping)均(Jun)含(Han)铬(Ge)量(Liang)≤(?)0.20%,平(Ping)均(Jun)含(Han)镍(Nie)量(Liang)≤(?)0.30%, (?) (?)含(Han)铜(Tong)0.20%左(Zuo)右(You). (?)
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