The normal material of Screw and Barrel:

Material:38CrMoALA

Hardness after hardening and tempering:HB260°-- 320° Nitrided Hardness:M/950°— 1100°

Nitrided Depth:0.50 0.7mm Nitrided Brittleness:above 2 stage Surface Roughness:Ra0.4

Screw straightness:0.015mm

Hardess of surface chromium-plating after Nitriding:HVa-950FIV Chromium-plating Depth:0.05 -0.10mm

ALLoy Depth:0.8 -2.0mm Alloy hardness:HRC56° -65°

Alloy:iron,nickel,tungsten,molybdenum

Process Specifications of screw and barrel: 25-38000KN clamping force

30g-50000g injection unit

Types of screw:

[For good plasticizing effect , we have different design of screw barrel to meet customer's demand]

Gradual type, mutant type, wave type, barrier type, double screen type, shunt type, separation type,exhaust type, pin type, mixed type, double- head type, three-head type, multi head type etc.