1specification from 1830mm  to 2565mm 

2 Technical Specification

3 Hardness After Hardending&Tempering : HB240~280

4 Nitrided Hardness : HV950~1000

5 Nitrided Case Depth : 0.55~0.7mm

6 Nitrided Brittleness :Less Than Grade 1

7 Surface Roughness :Ra 0.4

8 Screw Straightness :0.015mm

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

10 Chromium –plating Depth :0.05~0.10mm

11 Alloy Hardness : HRC55~62

12 Alloy Depth :1.5~2.0mm

13 Material&Processes

14 Quality 38CrMoALA

15 Qulity Duplex Stainless Steels

16 GH3#Steel

17 Quality Powder metallurgy Raw Materials

18 Cold/Thermal Spray Hard metal Process

19 Advanced nitriding Process

20 Corrosion & Abrasion Resistance Bimetal SprayingProcess

21 Horniness screw (HTP1:abrasion HTP2:corrosionresistance,HTP3:abrasion and corrosion resistance)