無縫管屬鋼(gang)材中(zhong)的一種材質。屬優質碳(tan)素結構鋼(gang)。

大量(liang)的模具生產公司會用到(dao)，做模具鋼使(shi)用。

無縫管的35指(zhi)此種材質中(zhong)碳(tan)的含量，大(da)概在350左右(you)。此種材質，相對于(yu)其他的優碳(tan)鋼，也較(jiao)普遍。

無縫管化學成份：

無縫管平均含碳量為0.32~0.40%,平均含硅量為0.17-0.37%,平均含錳量為0.50-0.80%,平均含硫量≤0.04%,平均含磷量≤0.25%,平均含鉻量≤0.25%,平均含鎳量≤0.25 ,含銅量≤0.25%左右.

無縫管的分類：

無(wu)(wu)縫(feng)無(wu)(wu)縫(feng)管分熱軋和冷(leng)軋（撥）無(wu)(wu)縫(feng)無(wu)(wu)縫(feng)管兩(liang)類(lei)。

熱軋無縫(feng)(feng)(feng)管分一般無縫(feng)(feng)(feng)管，低、中(zhong)壓鍋(guo)爐無縫(feng)(feng)(feng)管，高(gao)壓鍋(guo)爐無縫(feng)(feng)(feng)管、合金無縫(feng)(feng)(feng)管、不銹無縫(feng)(feng)(feng)管、石油裂化管、地質無縫(feng)(feng)(feng)管和其它無縫(feng)(feng)(feng)管等。

冷軋(ya)（撥）無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)除分(fen)一(yi)般無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、低中壓鍋爐(lu)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、高壓鍋爐(lu)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、合金無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、不銹無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、石油裂化管(guan)(guan)(guan)(guan)、其它無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)外(wai)(wai)，還包括(kuo)碳素薄(bo)壁(bi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、合金薄(bo)壁(bi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、不銹薄(bo)壁(bi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、異型無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)。熱軋(ya)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)外(wai)(wai)徑一(yi)般大于 32mm，壁(bi)厚2.5-75mm，冷軋(ya)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)處(chu)徑可(ke)以到(dao)(dao)6mm，壁(bi)厚可(ke)到(dao)(dao)0.25mm，薄(bo)壁(bi)管(guan)(guan)(guan)(guan)外(wai)(wai)徑可(ke)到(dao)(dao)5mm，壁(bi)厚小于0.25mm，冷軋(ya)比熱軋(ya)尺寸精度高。

一般用無縫管：是用10、20、30、35、45等優質碳結鋼16Mn、5MnV等低合金結構鋼或40Cr、30CrMnSi、45Mn2、40MnB等合金鋼熱軋或冷軋制成的。10、20等低碳鋼制造的無縫管主要用于流體輸送管道。45、40Cr等中碳鋼制成的無縫管用來制造機械零件，如汽車、拖拉機的受力零件。一般用無縫無縫管要保證強度和壓(ya)扁試驗。熱(re)軋(ya)無縫管以(yi)熱(re)軋(ya)狀(zhuang)態(tai)(tai)或熱(re)處(chu)理(li)狀(zhuang)態(tai)(tai)交貨；冷(leng)軋(ya)以(yi)熱(re)處(chu)理(li)狀(zhuang)態(tai)(tai)交貨。