- Steel forging with customer's designs - Strong machining and heat treatment ... , Flange, Coupling, Shell, Hydraulic Cylinder Forging, Roller Forging, Ring Forging, Gear Blank, Gear Wheel. 2. Materials: Carbon steel, Alloy steel 3. Supplying range: Shafts ... .5 ≤15 Block ≤4.0 / Ring ≤4.9 ≤3.5 Cylinder ≤1.5 ≤8.0 8. Standards: GB, JIS, AISI, SAE ...