... .8, 12CrMoV, 15CrMo , 1Cr13,1Cr18Ni9Ti, 0Cr19Ni9,00Cr19Ni11,00Cr17Ni12Mo2, 00Cr17Ni14Mo2ApplicationNatural gas , petroleum, chemical industry , electric power , metallurgy , thermodynamic fields, water supply engineering ... quick reply! Our aim is to provide all of our clients with value of the products instead of only low price! 600lb rf flange