45#無縫鋼管的現貨資源目前規格齊全，無縫鋼管用途很廣泛，一般用途的無縫鋼管由普通的碳素結構鋼、低合金結構鋼或合金結構鋼軋制，產量多，主要用作輸送流體的管道或結構零件。根(gen)據用(yong)途不同分三類(lei)供應：
A、按化學(xue)成分和機械性能(neng)供應;
B、按機械)性能(neng)供應;
C、按水壓試驗供應。GB9948無縫鋼管主要用來生產氣動或液壓元件的產品，如氣缸或油缸，都是用無縫管。45#無縫鋼管的化學(xue)成分有碳C、硅Si、錳Mn、硫S、磷P、鉻Cr。GB5310無(wu)(wu)縫(feng)鋼管(guan)(guan)(guan)(guan)按(an)照用(yong)途分為結構用(yong)無(wu)(wu)縫(feng)鋼管(guan)(guan)(guan)(guan);輸(shu)送用(yong)無(wu)(wu)縫(feng)鋼管(guan)(guan)(guan)(guan);鍋(guo)爐用(yong)無(wu)(wu)縫(feng)鋼管(guan)(guan)(guan)(guan);鍋(guo)爐用(yong)高壓無(wu)(wu)縫(feng)鋼管(guan)(guan)(guan)(guan)、無(wu)(wu)縫(feng)鋼管(guan)(guan)(guan)(guan)按(an)照斷面(mian)形(xing)(xing)(xing)(xing)狀(zhuang)，無(wu)(wu)縫(feng)鋼管(guan)(guan)(guan)(guan)分圓形(xing)(xing)(xing)(xing)和(he)異形(xing)(xing)(xing)(xing)兩種，異形(xing)(xing)(xing)(xing)管(guan)(guan)(guan)(guan)有方形(xing)(xing)(xing)(xing)、橢圓形(xing)(xing)(xing)(xing)、三角形(xing)(xing)(xing)(xing)、六(liu)角形(xing)(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)(xing)、星形(xing)(xing)(xing)(xing)、帶翅管(guan)(guan)(guan)(guan)多(duo)種復(fu)雜形(xing)(xing)(xing)(xing)狀(zhuang)。按(an)b類(lei)供應的(de)鋼管(guan)(guan)(guan)(guan)，如用(yong)(yong)于(yu)承受液體(ti)(ti)壓力(li)，也要(yao)進行水壓(特指：壓強)試驗。3、專門(men)用(yong)(yong)途的(de)無(wu)縫(feng)管(guan)(guan)(guan)(guan)有鍋爐(lu)用(yong)(yong)無(wu)縫(feng)管(guan)(guan)(guan)(guan)、化工電(dian)力(li)用(yong)(yong)，地質用(yong)(yong)無(wu)縫(feng)鋼管(guan)(guan)(guan)(guan)及(ji)石油用(yong)(yong)無(wu)縫(feng)管(guan)(guan)(guan)(guan)等(deng)多種(zhong)。無(wu)縫(feng)鋼管(guan)(guan)(guan)(guan)具有中空(kong)截面，大量用(yong)(yong)作(zuo)輸送流體(ti)(ti)的(de)管(guan)(guan)(guan)(guan)道(dao)，如輸送石油、天然氣(qi)、煤(mei)氣(qi)、水及(ji)某些固體(ti)(ti)物料的(de)管(guan)(guan)(guan)(guan)道(dao)等(deng)。鋼管(guan)(guan)(guan)(guan)與圓鋼等(deng)實(shi)心鋼材(cai)相比，在抗彎抗扭強度相同時，重量較(jiao)輕，是一種(zhong)經(jing)濟截面鋼材(cai)。
廣(guang)泛(fan)用(yong)(yong)于制(zhi)造(zao)結構件和(he)機械(xie)零件，如石油鉆(zhan)桿、汽車(che)傳動(dong)軸(傳動(dong)軸組成：軸管(guan)、伸(shen)縮套和(he)萬向節)、自行(xing)車(che)架以及(ji)建筑)施工中用(yong)(yong)的鋼腳手架等用(yong)(yong)鋼管(guan)制(zhi)造(zao)環(huan)形零件，可提高材(cai)料利用(yong)(yong)率，簡化(hua)制(zhi)造(zao)工序，節約材(cai)料和(he)加工工時，已廣(guang)泛(fan)用(yong)(yong)鋼管(guan)來制(zhi)造(zao)。
