A182/A336 F1rolled ring A182/A336 F5 rolled ring A182/A336 F9 rolled ring A182/A336 F11 rolled ring A182/A336 F12 rolled ring A182/A336 F22 rolled ring A182/A336 F23 rolled ring A182/A336 F91 rolled ring A182/A336 F92 rolled ring Ferritic alloy steel forgings for high-pressure and high-temperature parts, such as boilers and pressure vessels. A182 / A336 F1, F5, F9, F91, F92 A182 / A336 F11, F12, F22, F23
