... .hardness of 62-64 4.4-6inches,DN125,DN150,DN175 forging flange,Q235 flange Item No:002DN 125 Bilateral flangeTechnology:ForgingMaterial ... are processed by the Q345B material. After 1000 °C heating, forging and rolling, it’s shaped.Through a lot of technical ... service with high enthusiasm and pleasure. Best Regard! Schwing Practical Forging Flange,Q235 Pipe Flange