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1.injection screw barrel;, 2.38CrMoAlA base material;, 3.high plasticizing capacity;, 4.SKD61 screw tip available. - details see: https://www.machineto.com/nitrided-38crmoala-plastic-injection-screw-barrel-10334831

With the perfect design, our injection molding screw barrel is able to realize the high plasticizing capacity and molding function of your machine.

Specifications:

Base Material	38CrMoAlA, 40Cr, 42CrMo, SKD-61, Stainless Steel, etc
Surface Coating	Nitriding, Bimetallic, Hard Chrome Plated, Quenching, ect.
Technical Data	Nitriding thickness: 0.5~0.8mm Nitriding hardness: >900HV Surface roughness: Rao0.4/m Surface Straightness:0.015mm/m

All types of custom design screw and barrel components, to meet different customer requirements.

Since the injection molding screw tip is always under the higher wear and corrosion working condition than screw body. Per customer’s request, we will also provide the screw tip with different material from screw body,

like SKD61 or bimetallic (alloy) coating.

Bimetallic screw barrel are also available:

Four kinds of alloys for barrels:

Characteristic and Property		EJS01 Alloy	EJS02 Alloy	EJS03 Alloy	EJS04 Alloy
Wear resistance		very good	good	very good	excellent
Corrosion resistance		good	very good	very good	very good
Alloy		Fe+Ni+Cr+B	Ni+Cr+Co+B	Ni+Cr+Co+V+B	Ni+Cr+Wc+Co+B
Hardness (HRC)		58 ~ 64	50 ~ 58	56 ~ 64	58 ~ 67
Temperature area(°C)		≤400	≤450	≤450	≤600
Modulus of elasticity (kgf / mm)		19500			21000
Cofficient thermal Expansion (/°C)	RT-250°C	11.0×10-6	11.0×10-6	11.5×10-6	11×10-6
	RT-400°C	11.4×10-6	11.4×10-6	12.4×10-6	12×10-6

The specification of bimetallic screw barrel:

	Diameter	Length	The roughness of surface	The straightness
Barrel	15 ~ 250mm	≤ 4000mm	Ra0.4μm	0.015mm/m
Screw	15 ~ 350mm	≤ 8000mm	Ra0.4μm	0.015mm/m

E.J.S Workshop

E.J.S Inspection