35號鋼管屬優質碳素結構鋼。大量的模具生產公司會用到35號鋼管，做模具鋼使用。

35號鋼管是由整支圓鋼穿孔而成的，表面上沒有焊縫的鋼管，稱之為無縫管。根據生產方法，35號鋼管可分(fen)(fen)熱軋(ya)無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、冷(leng)軋(ya)無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、冷(leng)拔無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、擠壓(ya)無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、頂管(guan)(guan)(guan)(guan)(guan)等。按(an)照(zhao)斷面形(xing)(xing)(xing)狀，無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)分(fen)(fen)圓形(xing)(xing)(xing)和異形(xing)(xing)(xing)兩種，異形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)有方形(xing)(xing)(xing)、橢圓形(xing)(xing)(xing)、三角(jiao)形(xing)(xing)(xing)、六角(jiao)形(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)、星(xing)形(xing)(xing)(xing)、 帶翅管(guan)(guan)(guan)(guan)(guan)多種復雜形(xing)(xing)(xing)狀。根據用(yong)(yong)途不(bu)同， 有厚壁無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)和薄壁無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。無(wu)(wu)(wu)(wu)(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)主(zhu)要用(yong)(yong)做石(shi)油地質(zhi)鉆探(tan)管(guan)(guan)(guan)(guan)(guan)、石(shi)油化(hua)工用(yong)(yong)的裂化(hua)管(guan)(guan)(guan)(guan)(guan)、鍋(guo) 爐管(guan)(guan)(guan)(guan)(guan)、軸承管(guan)(guan)(guan)(guan)(guan)以及(ji)汽車(che)、拖拉機(ji)、航空用(yong)(yong)高(gao)精度結(jie)構鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。

鋼材力(li)學性(xing)(xing)能(neng)(neng)(neng)是保證鋼材最終(zhong)使(shi)用(yong)(yong)性(xing)(xing)能(neng)(neng)(neng)（機械性(xing)(xing)能(neng)(neng)(neng)）的(de)(de)重要指(zhi)標，它取(qu)決于鋼的(de)(de)化學成分和熱(re)處(chu)理制度。在鋼管標準中，根據不同(tong)的(de)(de)使(shi)用(yong)(yong)要求，規定(ding)了拉(la)(la)伸性(xing)(xing)能(neng)(neng)(neng)（抗拉(la)(la)強(qiang)度、屈服強(qiang)度或屈服點、伸長(chang)率(lv)）以(yi)及硬度、韌性(xing)(xing)指(zhi)標，還(huan)有用(yong)(yong)戶要求的(de)(de)高、低溫性(xing)(xing)能(neng)(neng)(neng)等。

35號鋼管的(de)35指此(ci)(ci)種材(cai)質中碳的(de)含量(liang)，大概在350左右(you)。此(ci)(ci)種材(cai)質，相對于其他(ta)的(de)優碳鋼，也(ye)較普遍。

化學成分

35號鋼管:平(ping)均含(han)碳量(liang)(liang)為(wei)0.32~0.40%,平(ping)均含(han)硅量(liang)(liang)為(wei)0.17-0.37%,平(ping)均含(han)錳量(liang)(liang)為(wei)0.50-0.80%,平(ping)均含(han)硫量(liang)(liang)≤0.04%,平(ping)均含(han)磷(lin)量(liang)(liang)≤0.25%,平(ping)均含(han)鉻量(liang)(liang)≤0.25%,平(ping)均含(han)鎳量(liang)(liang)≤0.25 ,含(han)銅(tong)量(liang)(liang)≤0.25%左右.

冷軋(ya)（撥）無縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)除分一般(ban)鋼(gang)(gang)(gang)管(guan)(guan)(guan)、低中壓(ya)鍋爐鋼(gang)(gang)(gang)管(guan)(guan)(guan)、高壓(ya)鍋爐鋼(gang)(gang)(gang)管(guan)(guan)(guan)、合金(jin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)、不銹鋼(gang)(gang)(gang)管(guan)(guan)(guan)、石(shi)油裂化(hua)管(guan)(guan)(guan)、其它鋼(gang)(gang)(gang)管(guan)(guan)(guan)外，還(huan)包括碳素薄壁鋼(gang)(gang)(gang)管(guan)(guan)(guan)、合金(jin)薄壁鋼(gang)(gang)(gang)管(guan)(guan)(guan)、不銹薄壁鋼(gang)(gang)(gang)管(guan)(guan)(guan)、異型鋼(gang)(gang)(gang)管(guan)(guan)(guan)。

熱軋35號鋼管外(wai)徑一般大于 32mm，壁(bi)厚(hou)2.5-75mm，冷(leng)軋(ya)無縫鋼管(guan)外(wai)徑可以(yi)到6mm，壁(bi)厚(hou)可到0.25mm，薄(bo)壁(bi)管(guan)外(wai)徑可到5mm，壁(bi)厚(hou)小于0.25mm，冷(leng)軋(ya)比熱軋(ya)尺寸精度高(gao)。

一般用鋼(gang)(gang)(gang)管(guan)(guan)：是用10、20、30、35、45等優質碳結鋼(gang)(gang)(gang)16Mn、5MnV等低合金結構鋼(gang)(gang)(gang)或(huo)40Cr、30CrMnSi、45Mn2、40MnB等合金鋼(gang)(gang)(gang)熱(re)(re)軋(ya)(ya)或(huo)冷(leng)軋(ya)(ya)制成的。10、20等低碳鋼(gang)(gang)(gang)制造(zao)(zao)的無縫(feng)(feng)管(guan)(guan)主要用于流體輸送管(guan)(guan)道。45、40Cr等中(zhong)碳鋼(gang)(gang)(gang)制成的無縫(feng)(feng)管(guan)(guan)用來制造(zao)(zao)機械零件，如汽(qi)車、拖(tuo)拉機的受(shou)力零件。一般用無縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)要保證強度和壓扁試(shi)驗。熱(re)(re)軋(ya)(ya)鋼(gang)(gang)(gang)管(guan)(guan)以熱(re)(re)軋(ya)(ya)狀態或(huo)熱(re)(re)處理(li)狀態交貨(huo)(huo)；冷(leng)軋(ya)(ya)以熱(re)(re)處理(li)狀態交貨(huo)(huo)