Technical Specification 1. Hardness after hardening & tempering: HB240-280 2. Nitrided hardness: HV850-1000 3. Nitrided cass depth: 0.45-0.7mm 4. Nitrided brittleness: Less than grade 2 5. Surface roughness: Ra0.4 6. Screw straightness: 0.015mm 7. Surgace chromium-plating's hardness after nitriding: >900HB 8. Chromium-plating depth: 0.05-0.10mm 9. Alloy hardness: HRC56-65 10. Alloy depth: 0.8-2.0mm Materials &Processes 1. Quality 38CrMoAlA 2. Quality duplex stainless steels 3. GH113 4. Quality nickel-based alloy powder 5. Cold/thermal spray hard metal process 6. Advanced nitriding process 7. Corrosion &abrasion resistance bimetal spraying process.