... Flange: Production Name forged welding neck flanges,St37,DIN,DN:50-600 mm,rated pressure:10 bar Size1/4''-48'',DN8 ... Steel16Mn Cr5Mo 12Cr1MoV A335P22 St45.8ASTM A860 WPHY X42 X52 X60 X70 Aluminum Steel1060,2024,2017,3003,5052,5083,6061,6083 ... Third Party inpection forged welding neck flanges,St37,DIN,DN:50-600 mm,rated pressure:10 bar