... Coupling, BOP Body, Tube Plate, Roller Forging, Ring Forging, Gear Blank, Gear Wheel. 2. Materials: Carbon steel, Alloy steel 3. Supplying ... Research Institute, CSIC. UT test: 100% ultrasonic test according to EN10228-2, SA388 etc. Heat Treatment Report: provide original copy ... Steel Ingot: EAF-LF-VD/ESR. Material Certificate according to En10204-3.1 is requested from ingot supplier. 6. Specifications ...