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(yong)途不同分三類(lei)供應(ying)：

　　A、按(an)化學成分(fen)和(he)機械性能供應;

　　B、按(an)機械(xie))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(xue)成分(fen)(fen)有碳C、硅Si、錳Mn、硫S、磷P、鉻(ge)Cr。GB5310無(wu)縫鋼(gang)管(guan)(guan)(guan)按(an)照用(yong)途分(fen)(fen)為結構用(yong)無(wu)縫鋼(gang)管(guan)(guan)(guan);輸送用(yong)無(wu)縫鋼(gang)管(guan)(guan)(guan);鍋爐用(yong)無(wu)縫鋼(gang)管(guan)(guan)(guan);鍋爐用(yong)高壓無(wu)縫鋼(gang)管(guan)(guan)(guan)、無(wu)縫鋼(gang)管(guan)(guan)(guan)按(an)照斷面形(xing)(xing)(xing)(xing)狀，無(wu)縫鋼(gang)管(guan)(guan)(guan)分(fen)(fen)圓(yuan)形(xing)(xing)(xing)(xing)和異(yi)形(xing)(xing)(xing)(xing)兩種，異(yi)形(xing)(xing)(xing)(xing)管(guan)(guan)(guan)有方形(xing)(xing)(xing)(xing)、橢圓(yuan)形(xing)(xing)(xing)(xing)、三角形(xing)(xing)(xing)(xing)、六角形(xing)(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)(xing)、星形(xing)(xing)(xing)(xing)、帶翅管(guan)(guan)(guan)多種復雜形(xing)(xing)(xing)(xing)狀。按(an)b類供應的(de)鋼(gang)(gang)管(guan)(guan)(guan)(guan)，如(ru)用(yong)于承受液體壓力(li)，也(ye)要進行水壓(特指(zhi)：壓強)試(shi)驗。3、專門用(yong)途的(de)無(wu)(wu)縫管(guan)(guan)(guan)(guan)有(you)鍋爐用(yong)無(wu)(wu)縫管(guan)(guan)(guan)(guan)、化(hua)工(gong)電力(li)用(yong)，地(di)質用(yong)無(wu)(wu)縫鋼(gang)(gang)管(guan)(guan)(guan)(guan)及(ji)石油(you)(you)用(yong)無(wu)(wu)縫管(guan)(guan)(guan)(guan)等(deng)多種(zhong)。無(wu)(wu)縫鋼(gang)(gang)管(guan)(guan)(guan)(guan)具有(you)中空(kong)截面，大(da)量用(yong)作(zuo)輸送(song)流(liu)體的(de)管(guan)(guan)(guan)(guan)道(dao)，如(ru)輸送(song)石油(you)(you)、天然氣、煤氣、水及(ji)某些固體物料的(de)管(guan)(guan)(guan)(guan)道(dao)等(deng)。鋼(gang)(gang)管(guan)(guan)(guan)(guan)與圓鋼(gang)(gang)等(deng)實心鋼(gang)(gang)材(cai)相比，在(zai)抗彎抗扭強度(du)相同時，重(zhong)量較輕，是(shi)一種(zhong)經(jing)濟截面鋼(gang)(gang)材(cai)。

　　廣泛用于制(zhi)造結構件(jian)(jian)和機械零件(jian)(jian)，如石油鉆桿、汽(qi)車(che)傳動軸(傳動軸組成：軸管(guan)、伸縮套和萬向節)、自行車(che)架(jia)以(yi)及建筑)施工(gong)中用的鋼(gang)(gang)腳手架(jia)等用鋼(gang)(gang)管(guan)制(zhi)造環形零件(jian)(jian)，可提高(gao)材(cai)料(liao)利用率，簡(jian)化制(zhi)造工(gong)序，節約材(cai)料(liao)和加工(gong)工(gong)時，已(yi)廣泛用鋼(gang)(gang)管(guan)來制(zhi)造。