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(ju)用途不同分三類供(gong)應：

　　A、按(an)化學成分(fen)和(he)機械性能供(gong)應(ying);

　　B、按機械(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#無縫鋼管的化學成分(fen)(fen)有碳(tan)C、硅(gui)Si、錳Mn、硫S、磷P、鉻Cr。GB5310無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)按照(zhao)用(yong)(yong)(yong)途分(fen)(fen)為結構用(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan);輸送用(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan);鍋爐用(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan);鍋爐用(yong)(yong)(yong)高壓(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)、無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)按照(zhao)斷面形狀，無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)分(fen)(fen)圓(yuan)形和異形兩種(zhong)，異形管(guan)(guan)有方(fang)形、橢圓(yuan)形、三角(jiao)形、六角(jiao)形、瓜子形、星形、帶翅(chi)管(guan)(guan)多(duo)種(zhong)復雜形狀。按b類供應的鋼管(guan)(guan)(guan)，如(ru)用于承受(shou)液體(ti)(ti)壓力，也要進(jin)行水壓(特(te)指：壓強(qiang))試驗。3、專(zhuan)門用途的無(wu)縫(feng)管(guan)(guan)(guan)有(you)鍋爐用無(wu)縫(feng)管(guan)(guan)(guan)、化工電力用，地(di)質用無(wu)縫(feng)鋼管(guan)(guan)(guan)及石(shi)油用無(wu)縫(feng)管(guan)(guan)(guan)等多種。無(wu)縫(feng)鋼管(guan)(guan)(guan)具有(you)中空截面，大量用作輸(shu)(shu)送(song)流體(ti)(ti)的管(guan)(guan)(guan)道，如(ru)輸(shu)(shu)送(song)石(shi)油、天然氣、煤(mei)氣、水及某些固體(ti)(ti)物料(liao)的管(guan)(guan)(guan)道等。鋼管(guan)(guan)(guan)與(yu)圓鋼等實心鋼材相(xiang)(xiang)比，在抗(kang)彎抗(kang)扭強(qiang)度相(xiang)(xiang)同時，重量較輕，是一種經(jing)濟截面鋼材。

　　廣泛用(yong)于制造(zao)結(jie)構件(jian)和機械(xie)零件(jian)，如石油(you)鉆桿、汽車傳動軸(zhou)(zhou)(傳動軸(zhou)(zhou)組(zu)成：軸(zhou)(zhou)管、伸縮套和萬向節)、自行車架(jia)以及建筑)施(shi)工(gong)中用(yong)的(de)鋼腳手架(jia)等用(yong)鋼管制造(zao)環(huan)形(xing)零件(jian)，可提高(gao)材(cai)料利用(yong)率(lv)，簡(jian)化(hua)制造(zao)工(gong)序，節約材(cai)料和加工(gong)工(gong)時，已廣泛用(yong)鋼管來制造(zao)。