... steel, Alloy steel 3.Supplying range: Shafts, Sleeves, Rings, Cylinders, Blocks, Modules etc 4. Process: Forging/Casting – Normalizing & Tempering – Proof Machining ... third party, Luoyang Ship Material Research Institute, CSIC. UT test: 100% ultrasonic test according to EN10228-3, SA388, Sep 1921 C/c etc ...