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SCH17 Boiler Air Nozzle Castings ASTM A297 HE Cr29Ni9 EB3012 Material Grade: SCH17, ASTM A297 HE, Cr29Ni9 ,ASTM A297 HK ,Cr25Ni20,ZG40Cr25Ni20Si2, Cr25Ni14; HK2Co20;1.4852;1.4849;Cr14Ni9; Quality ...