Technical Specification

1,Hardness After Hardending&Tempering : HB240~280

2,Nitrided Hardness : HV900~950

3,Nitrided Case Depth : 0.55~0.7mm

4,Nitrided Brittleness :Less Than Grade 1

5,Surface Roughness :Ra 0.4

6,Screw Straightness :0.015mm

7,Surface Chromium-Plating’s Hardness After  Nitriding≥900HB

8,Chromium –plating Depth :0.05~0.10mm

9,Alloy Hardness : HRC55~62

10,Alloy Depth :1.5~2.0mm

Material&Processes

1,Quality 38CrMoALA

2,GH3#Steel

3,Quality Powder Metallurgy Raw Materials

4,Cold/Thermal Spray Hard Metal Process

5,Advanced nitriding Process

6,Corrosion & Abrasion Resistance Bimetal Spraying Process

7,Horniness screw (HTP1:abrasion HTP2:corrosion resistance,HTP3:abrasion and corrosion resistance

Conical twin screw &barrel