Zhoushan Zhongyang Screw Manufacturing Co., Ltd. [China]

Detailed Product Description

The single screw's Abraasion resistant and corrosion resistant

Material:High quality alloy steel

           1)38CrMoAlA

           2)42CrMo

           3)Cr12MoV

           4)4Cr5MoSiVL

           5)CCrWMov

           6)9Gr18MoV

Technics:1)Heat-treatment

              2)Nitriding treatment

              3)Hard-chrome electroplated

              4)High-frequency quenching

              5)Bimetallic-alloy coating spraying

Technical paremeter

Nitriding depth:0.50-0.80mm

Nitriding hardness:900-1000HV

Nitriding barittleness:Less than grade 1

Surface roughness:Ra0.4

Linearity of the screw:0.015mm

Hardness of the chromium plationg after nitriding :more than 950HV

Chrome plating thickness:0.025-0.085mm