合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)（Alloy pipe）是無縫(feng)(feng)鋼管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)一(yi)種，合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)分(fen)為結構用無縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)及(ji)高壓耐(nai)(nai)熱合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)。主(zhu)要區別于合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)生(sheng)產(chan)標準(zhun)及(ji)其工(gong)業，對合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)進行退火調質(zhi)改變它的(de)(de)(de)機(ji)械性(xing)(xing)能(neng)。達(da)到(dao)所需(xu)要的(de)(de)(de)加工(gong)條件。其性(xing)(xing)能(neng)比一(yi)般的(de)(de)(de)無縫(feng)(feng)鋼管(guan)(guan)(guan)(guan)(guan)多(duo)變利(li)用值較(jiao)高，合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)化學(xue)成分(fen)中(zhong)含Cr比較(jiao)多(duo)，耐(nai)(nai)高溫(wen)、耐(nai)(nai)低溫(wen)、耐(nai)(nai)腐蝕(shi)的(de)(de)(de)性(xing)(xing)能(neng)。普(pu)碳無縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)中(zhong)不(bu)含合(he)金(jin)成分(fen)或者(zhe)合(he)金(jin)成分(fen)很少，合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)在石油、航天、化工(gong)、電力、鍋爐、軍工(gong)等(deng)行業的(de)(de)(de)用途比較(jiao)廣泛的(de)(de)(de)原(yuan)因因為合(he)金(jin)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)機(ji)械性(xing)(xing)能(neng)多(duo)變化好調整。