1.       Material: 38CrMoAlA

2.       Nitring treatment ,Surface hardness:HV≥900

3.       Nitring depth :0.5-0.8mm

4.       Material: Special stainless steel

5.       Quenching treatment ,hardness HRC55-58

6.       Suitable for the screw which used for transparent plastic products and

7.       high corrosion plastic procesing ,prolong life of screw

8.       Materia : Tungsten alloy