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(tong)分(fen)三(san)類供應：

　　A、按化學(xue)成分和機械性(xing)能供應(ying);

　　B、按機(ji)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#無縫鋼管的化學成分(fen)有(you)碳C、硅(gui)Si、錳Mn、硫S、磷P、鉻Cr。GB5310無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)按照用途分(fen)為結構用無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan);輸送用無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan);鍋(guo)爐用無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan);鍋(guo)爐用高壓無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)、無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)按照斷面形(xing)(xing)(xing)狀，無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)分(fen)圓形(xing)(xing)(xing)和異形(xing)(xing)(xing)兩種(zhong)(zhong)，異形(xing)(xing)(xing)管(guan)有(you)方(fang)形(xing)(xing)(xing)、橢圓形(xing)(xing)(xing)、三角(jiao)形(xing)(xing)(xing)、六(liu)角(jiao)形(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)、星形(xing)(xing)(xing)、帶翅管(guan)多種(zhong)(zhong)復雜形(xing)(xing)(xing)狀。按b類供應的鋼(gang)(gang)管(guan)(guan)(guan)，如(ru)用(yong)(yong)(yong)于承受(shou)液(ye)體(ti)壓力，也要進行水壓(特指：壓強)試驗。3、專門(men)用(yong)(yong)(yong)途(tu)的無(wu)(wu)縫管(guan)(guan)(guan)有(you)鍋爐用(yong)(yong)(yong)無(wu)(wu)縫管(guan)(guan)(guan)、化工電(dian)力用(yong)(yong)(yong)，地質用(yong)(yong)(yong)無(wu)(wu)縫鋼(gang)(gang)管(guan)(guan)(guan)及(ji)石油(you)用(yong)(yong)(yong)無(wu)(wu)縫管(guan)(guan)(guan)等(deng)多種。無(wu)(wu)縫鋼(gang)(gang)管(guan)(guan)(guan)具(ju)有(you)中空截面(mian)，大量(liang)用(yong)(yong)(yong)作(zuo)輸送流體(ti)的管(guan)(guan)(guan)道，如(ru)輸送石油(you)、天(tian)然氣(qi)、煤氣(qi)、水及(ji)某(mou)些固體(ti)物(wu)料的管(guan)(guan)(guan)道等(deng)。鋼(gang)(gang)管(guan)(guan)(guan)與(yu)圓鋼(gang)(gang)等(deng)實心鋼(gang)(gang)材相(xiang)比，在抗(kang)彎抗(kang)扭強度(du)相(xiang)同(tong)時，重量(liang)較(jiao)輕，是一種經濟(ji)截面(mian)鋼(gang)(gang)材。

　　廣泛(fan)用于(yu)制造結構件和(he)機械零件，如石油(you)鉆桿、汽(qi)車傳動(dong)軸(傳動(dong)軸組成(cheng)：軸管、伸縮套和(he)萬向節)、自行車架以(yi)及建筑(zhu))施工中用的鋼(gang)腳手架等用鋼(gang)管制造環形零件，可提高材(cai)料利用率，簡化制造工序，節約(yue)材(cai)料和(he)加工工時，已廣泛(fan)用鋼(gang)管來制造。