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)熱軋(ya)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)、冷軋(ya)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)、冷拔無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)、擠壓無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)、頂管(guan)(guan)(guan)(guan)等(deng)。按照斷面形(xing)(xing)(xing)(xing)狀，無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)分(fen)圓形(xing)(xing)(xing)(xing)和(he)異形(xing)(xing)(xing)(xing)兩種，異形(xing)(xing)(xing)(xing)管(guan)(guan)(guan)(guan)有方(fang)形(xing)(xing)(xing)(xing)、橢圓形(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)(guan)多(duo)種復雜形(xing)(xing)(xing)(xing)狀。根(gen)據用途不同， 有厚壁(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)和(he)薄壁(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)。無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)主要用做石油地質鉆(zhan)探管(guan)(guan)(guan)(guan)、石油化工用的裂(lie)化管(guan)(guan)(guan)(guan)、鍋(guo) 爐管(guan)(guan)(guan)(guan)、軸(zhou)承管(guan)(guan)(guan)(guan)以及汽(qi)車、拖拉機、航空用高精(jing)度結構鋼(gang)管(guan)(guan)(guan)(guan)。

鋼材力學(xue)性能(neng)(neng)是保(bao)證鋼材最終使用(yong)性能(neng)(neng)（機械性能(neng)(neng)）的(de)重要指(zhi)標(biao)，它取決(jue)于鋼的(de)化學(xue)成分和熱處理制(zhi)度。在鋼管標(biao)準(zhun)中，根(gen)據(ju)不同的(de)使用(yong)要求(qiu)，規定了拉(la)伸性能(neng)(neng)（抗拉(la)強(qiang)度、屈服強(qiang)度或屈服點(dian)、伸長率）以(yi)及硬度、韌性指(zhi)標(biao)，還有用(yong)戶要求(qiu)的(de)高、低溫性能(neng)(neng)等。

35號鋼管的35指此(ci)種(zhong)材(cai)質中(zhong)碳(tan)的含量，大概在350左右。此(ci)種(zhong)材(cai)質，相(xiang)對于其他的優碳(tan)鋼，也較普(pu)遍。

化學成分

35號鋼管:平均(jun)含(han)(han)(han)(han)(han)碳量(liang)(liang)(liang)(liang)為(wei)0.32~0.40%,平均(jun)含(han)(han)(han)(han)(han)硅量(liang)(liang)(liang)(liang)為(wei)0.17-0.37%,平均(jun)含(han)(han)(han)(han)(han)錳量(liang)(liang)(liang)(liang)為(wei)0.50-0.80%,平均(jun)含(han)(han)(han)(han)(han)硫量(liang)(liang)(liang)(liang)≤0.04%,平均(jun)含(han)(han)(han)(han)(han)磷量(liang)(liang)(liang)(liang)≤0.25%,平均(jun)含(han)(han)(han)(han)(han)鉻量(liang)(liang)(liang)(liang)≤0.25%,平均(jun)含(han)(han)(han)(han)(han)鎳(nie)量(liang)(liang)(liang)(liang)≤0.25 ,含(han)(han)(han)(han)(han)銅量(liang)(liang)(liang)(liang)≤0.25%左右.

冷(leng)軋（撥(bo)）無縫鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)除分(fen)一般(ban)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、低中壓鍋爐鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、高壓鍋爐鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、合金鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、不(bu)銹(xiu)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、石油裂化管(guan)(guan)(guan)、其它鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)外，還包(bao)括碳素薄壁鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、合金薄壁鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、不(bu)銹(xiu)薄壁鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)、異型鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)。

熱軋35號鋼管外徑(jing)一般大(da)于(yu) 32mm，壁(bi)(bi)厚(hou)2.5-75mm，冷軋無縫(feng)鋼管外徑(jing)可以到(dao)(dao)6mm，壁(bi)(bi)厚(hou)可到(dao)(dao)0.25mm，薄壁(bi)(bi)管外徑(jing)可到(dao)(dao)5mm，壁(bi)(bi)厚(hou)小(xiao)于(yu)0.25mm，冷軋比熱軋尺寸精度(du)高(gao)。

一般用鋼(gang)(gang)管(guan)：是用10、20、30、35、45等(deng)優質碳結鋼(gang)(gang)16Mn、5MnV等(deng)低合金結構鋼(gang)(gang)或(huo)40Cr、30CrMnSi、45Mn2、40MnB等(deng)合金鋼(gang)(gang)熱(re)(re)軋或(huo)冷軋制(zhi)成的(de)。10、20等(deng)低碳鋼(gang)(gang)制(zhi)造的(de)無縫(feng)管(guan)主要用于(yu)流體輸送管(guan)道。45、40Cr等(deng)中碳鋼(gang)(gang)制(zhi)成的(de)無縫(feng)管(guan)用來制(zhi)造機械(xie)零件，如(ru)汽車、拖拉機的(de)受(shou)力零件。一般用無縫(feng)鋼(gang)(gang)管(guan)要保(bao)證強度和(he)壓扁試(shi)驗。熱(re)(re)軋鋼(gang)(gang)管(guan)以(yi)熱(re)(re)軋狀態(tai)(tai)或(huo)熱(re)(re)處理狀態(tai)(tai)交貨；冷軋以(yi)熱(re)(re)處理狀態(tai)(tai)交貨