q355b合金钢管主含铝合金原素，钒V、钛Ti、铝AL、硼B、希土RE等铝合金原素，均属微铝合金原素，适用范围是用以发电厂，核电厂，高压锅炉，高溫受热面和再热水器等髙压高溫的管路上及机器设备上。

　　q355bHEJINGANGGUANYOUJIHUAXUECHENGFEN

　　(1)GANGCAIXINGHAOKAISHIDELIANGWEISHUZIBIAOSHIGANGDETANCHENGFEN，YIJUNZHITANCHENGFENDEBAIFENZHILINGDIANJIBIAOMING，RU40Cr，q355bHEJINGANGGUAN。

　　(2)GANGZHONGGUANJIANLVHEJINYUANSU，CHUGEBIEWEILVHEJINYUANSUWAI，YIBANYIBAIFENZHIJIBIAOMING。DANGJUNZHILVHEJINCHENGFEN<1.5%SHI，GANGCAIXINGHAOZHONGYIBANZHIBIAOMINGHUAXUEFUHAO，ERBUBIAOCHUCHENGFEN，DANZAITESHUQINGKUANGXIAYIZHIGAOHUNZHE，ZAIHUAXUEFUHAOHOUYEKEYIBIAOYISHUJU"1"，BIRUGANGCAIXINGHAO"12CrMoV"HE"12Cr1MoV"，QIANMIANYIZHONGGECHENGFENWEI0.4-0.6%，HOUMIANYIZHONGWEI0.9-1.2%，QITACHENGFENSUOYOUTONGYANG。DANGLVHEJINYUANSUJUNZHICHENGFEN≥1.5%、≥2.5%、≥3.5%……SHI，ZAIHUAXUEFUHAOHOUBIANYINGBIAOCHUCHENGFEN，KEXIANGDUIBIAOMINGWEI2、3、4……DENG。BIRU18Cr2Ni4WA。

　　(3)GANGZHONGDEFANV、TAITi、LVAL、PENGB、XITUREDENGLVHEJINYUANSU，JUNSHUWEILVHEJINYUANSU，JINGUANCHENGFENHENDI，RENGYINGZAIGANGCAIXINGHAOZHONGBIAOMING。BIRU20MnVBGANGZHONG。FANWEI0.07-0.12%，PENGWEI0.001-0.005%。

　　(4)GAOJIYOUZHIGANGYINGZAIGANGCAIXINGHAOZHONGJIA"A"，YICHABIEYUYIBANYOUZHIGANG。

　　(5)ZHUANYEZHUYAOYONGTUDEHEJINGONGJUGANG，GANGCAIXINGHAOGUANYU(HUOHOUZHUIMING)YIWEIZHEGAIGANGCAIPAIHAOZHUYAOYONGTUDEBIAOJI。BIRUMAOLUOZHUANYONGXINGDE30CrMnSiGANG，GANGCAIXINGHAOBIAOMINGWEIML30CrMnSi。