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。根據用途不同分三(san)類供應：
A、按化學成分和機械性能供應;
B、按(an)機(ji)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#無縫鋼管的化學成分(fen)有碳C、硅Si、錳Mn、硫S、磷(lin)P、鉻Cr。GB5310無(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)按照用途分(fen)為結構用無(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan);輸送用無(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan);鍋(guo)(guo)爐用無(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan);鍋(guo)(guo)爐用高壓(ya)無(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)、無(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)按照斷面形(xing)(xing)(xing)(xing)(xing)狀(zhuang)(zhuang)，無(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)分(fen)圓(yuan)形(xing)(xing)(xing)(xing)(xing)和(he)異(yi)形(xing)(xing)(xing)(xing)(xing)兩種，異(yi)形(xing)(xing)(xing)(xing)(xing)管(guan)(guan)(guan)有方形(xing)(xing)(xing)(xing)(xing)、橢(tuo)圓(yuan)形(xing)(xing)(xing)(xing)(xing)、三角形(xing)(xing)(xing)(xing)(xing)、六角形(xing)(xing)(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)(xing)(xing)、星形(xing)(xing)(xing)(xing)(xing)、帶翅管(guan)(guan)(guan)多(duo)種復雜形(xing)(xing)(xing)(xing)(xing)狀(zhuang)(zhuang)。按b類供應的(de)鋼(gang)(gang)(gang)管(guan)(guan)，如用(yong)(yong)于(yu)承受液體(ti)壓(ya)力(li)，也(ye)要進行水(shui)壓(ya)(特指：壓(ya)強)試驗(yan)。3、專門用(yong)(yong)途(tu)的(de)無縫(feng)管(guan)(guan)有鍋(guo)爐用(yong)(yong)無縫(feng)管(guan)(guan)、化工電(dian)力(li)用(yong)(yong)，地質用(yong)(yong)無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)及(ji)石(shi)油(you)用(yong)(yong)無縫(feng)管(guan)(guan)等多(duo)種(zhong)。無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)具有中(zhong)空(kong)截(jie)面(mian)，大量(liang)用(yong)(yong)作輸送流體(ti)的(de)管(guan)(guan)道，如輸送石(shi)油(you)、天然(ran)氣、煤氣、水(shui)及(ji)某些固體(ti)物料的(de)管(guan)(guan)道等。鋼(gang)(gang)(gang)管(guan)(guan)與圓鋼(gang)(gang)(gang)等實心鋼(gang)(gang)(gang)材相比，在抗彎抗扭強度(du)相同時(shi)，重量(liang)較輕(qing)，是一種(zhong)經濟截(jie)面(mian)鋼(gang)(gang)(gang)材。
廣泛(fan)用(yong)于制造結(jie)構件(jian)和機(ji)械零件(jian)，如石油鉆桿、汽車傳動軸(傳動軸組成：軸管(guan)、伸縮套和萬向節)、自行車架(jia)以及建筑)施工(gong)中(zhong)用(yong)的鋼腳手架(jia)等用(yong)鋼管(guan)制造環(huan)形零件(jian)，可提(ti)高材料(liao)利用(yong)率，簡化制造工(gong)序(xu)，節約材料(liao)和加工(gong)工(gong)時，已廣泛(fan)用(yong)鋼管(guan)來制造。
