... Plate, Roller Forging, Roller Shell, Ring Forging, Gears, Gear Blank, Gear Shaft, Gear Wheel. 2. Materials: Carbon steel, Alloy steel 3.Supplying range ... Research Institute, CSIC. UT test: 100% ultrasonic test according to EN10228-3, SA388, Sep 1921 C/c etc. Heat Treatment ... Steel Ingot: EAF-LF-VD/ESR. Material Certificate according to En10204-3.1 is requested from ingot supplier. 6. Specifications ...