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。根據用途不(bu)同分三類供應：

　　A、按化學成分和機械性(xing)能供應;

　　B、按機械)性能供應;

　　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#無縫鋼管的化學成分有碳(tan)C、硅Si、錳Mn、硫S、磷(lin)P、鉻Cr。GB5310無縫(feng)鋼(gang)管(guan)(guan)按(an)照用(yong)途(tu)分為(wei)結構(gou)用(yong)無縫(feng)鋼(gang)管(guan)(guan);輸(shu)送用(yong)無縫(feng)鋼(gang)管(guan)(guan);鍋(guo)爐用(yong)無縫(feng)鋼(gang)管(guan)(guan);鍋(guo)爐用(yong)高壓無縫(feng)鋼(gang)管(guan)(guan)、無縫(feng)鋼(gang)管(guan)(guan)按(an)照斷(duan)面(mian)形(xing)(xing)(xing)狀，無縫(feng)鋼(gang)管(guan)(guan)分圓形(xing)(xing)(xing)和異形(xing)(xing)(xing)兩種，異形(xing)(xing)(xing)管(guan)(guan)有方形(xing)(xing)(xing)、橢圓形(xing)(xing)(xing)、三角(jiao)(jiao)形(xing)(xing)(xing)、六(liu)角(jiao)(jiao)形(xing)(xing)(xing)、瓜(gua)子形(xing)(xing)(xing)、星形(xing)(xing)(xing)、帶翅管(guan)(guan)多種復雜(za)形(xing)(xing)(xing)狀。按(an)b類供應的(de)鋼(gang)(gang)(gang)管，如(ru)用(yong)(yong)(yong)于承受液體壓(ya)力(li)，也要(yao)進行水(shui)壓(ya)(特指：壓(ya)強)試(shi)驗。3、專門(men)用(yong)(yong)(yong)途的(de)無(wu)(wu)縫(feng)管有鍋爐用(yong)(yong)(yong)無(wu)(wu)縫(feng)管、化(hua)工(gong)電力(li)用(yong)(yong)(yong)，地質用(yong)(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管及(ji)石油(you)用(yong)(yong)(yong)無(wu)(wu)縫(feng)管等多(duo)種。無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管具有中(zhong)空(kong)截(jie)面，大量用(yong)(yong)(yong)作輸送流體的(de)管道(dao)，如(ru)輸送石油(you)、天(tian)然氣、煤氣、水(shui)及(ji)某些固體物料(liao)的(de)管道(dao)等。鋼(gang)(gang)(gang)管與圓鋼(gang)(gang)(gang)等實心鋼(gang)(gang)(gang)材相比，在(zai)抗彎抗扭強度相同(tong)時，重量較輕，是一(yi)種經(jing)濟截(jie)面鋼(gang)(gang)(gang)材。

　　廣(guang)泛(fan)用(yong)于(yu)制(zhi)造結構件(jian)和機械零件(jian)，如(ru)石油鉆桿(gan)、汽車傳(chuan)動(dong)軸(傳(chuan)動(dong)軸組成：軸管(guan)、伸縮套和萬向(xiang)節)、自行車架以及(ji)建(jian)筑(zhu))施工中(zhong)用(yong)的(de)鋼(gang)腳手架等用(yong)鋼(gang)管(guan)制(zhi)造環形零件(jian)，可提高材料利用(yong)率，簡化制(zhi)造工序(xu)，節約材料和加(jia)工工時，已廣(guang)泛(fan)用(yong)鋼(gang)管(guan)來制(zhi)造。