Specifications

L/D: 18~25

Technical Index

1. Hardness after hardening and tempering: HB280-320
2. Nitrided Hardness: HV850-1000
3. Nitrided case depth: 0.50-0.80mm
4. Nitrided brittleness: Less than grade 2
5. Surface roughness: Ra 0.4
6. Screw straightness: 0.015 mm
7. Surface chromium-plating's hardness after nitriding: ≥ 900HV
8. Chromium-plating depth: 0.025~0.10 mm
9. Alloy Hardness: HRC50-65
10. Alloy depth: 0.8~2.0 mm

Materials & Processes

1. Quality 38CrMoAlA (JIS SACM645)
2. Quality Duplex Stainless Steels
3.42 CrMo (JIS SCM440)
4.40Cr
5. GH113
6. SKD11
7. SKD61 (H13)
8. Gr12MoV
9. Quality Powder Metallurgy Raw Materials
10. Cold/Thermal Spray Hard Metal Process
11. Advanced nitriding Process
12. Corrosion & Abrasion Resistance Bimetal Spraying Process

Quality Control

1. Management System: ISO9001: 2008
2. Advanced quality inspection center
3. Digital vickers hardness tester
4. Portable's hardness machine
5. Metal ultrasonic flaw detector