... Custom Open Die Forging, Main Shaft, Wind Power Shaft, Stabilizer, Flange, Coupling, BOP Body, Tube Plate, Roller Forging, Ring Forging, ... Gear Blank, Gear Wheel. 2. Materials: Carbon steel, Alloy steel 3. Supplying range: Shafts, Sleeves, Rings, Cylinders, Blocks, ... : provide original copy of heat treatment curve/time table. Steel Ingot: EAF-LF-VD/ESR. Material Certificate according to ...