Bimetallic Barrels

Bimetallic barrels supplier EJS INDUSTRY has been producing bimetallic barrels for over a dozen of years to extend the barrels life as well as to reduce the cost and machine down time.
Bimetallic barrel is like a tube and completely filled with a powered metal. There are different types of bimetallic barrels available which are used for various purposes such as extrusion, injection molding and blow molding machinery. The usage of bimetallic barrel provides a protective wear surface to improve the wear life.

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Product Description

Types of bimetallic barrels at EJS:

Centrifugal casting inlay type;

Carbide liner type.

Alloy power used for bimetallic barrels:

Iron-based alloy powder for general application.

Nickel-based alloy powder with customized Tungsten for anti-wearing.

Base steel used for bimetallic barrels are 40Cr. After years of manufacturing bimetallic barrels, we found 40Cr has the best performance doing bimetallic. When some customers request other steels, we believe base steel is not vital on the barrel life---when the bimetallic barrel layer is worn out, it’s time to get a new barrel.

For bimetallic barrels, bimetallic process takes a big part in the cost structure, therefore it’s better to get a new barrel when the carbide liner is worn out, other than re-do the lining work for the old barrel.

Question: can you make all barrels bimetallic barrels?

Not really. Bimetallic barrels production has a request on barrel walls, if the barrel is too thin, it’s not possible to make it bimetallic barrel.

Meanwhile, the barrel outer diameter, the barrel length is also important when considering bimetallic barrels production. Please contact EJS Sales Department to find out the possibilities with your screw and barrel design.

About E.J.S.

EJS Screw Barrels is a newly created brand name for Export business with manufacturing experiences since 1992.
A screw barrel manufacturer dedicated on producing customized screw barrel and design extruder screw barrels, injection moulding screw barrels.

Bimetallic Screw Barrels

We started to make bimetallic screw barrel at a very early age, almost the same time as the first bimetallic barrel was born in China. Now we have several types for options depending on different applications

Bimetallic Barrels
Alloy Type		EJS01 Alloy	EJS02 Alloy	EJS03 Alloy	EJS04 Alloy
Alloy Components		Fe+Ni+Cr+B (Fe:65, Ni:14, Cr8, B:3.5)	Ni+Cr+Co+B	Ni+Cr+Co+V+B	Ni+Wc+Cr+B (Ni:50, Wc:15~35,Cr:6~8, B:2.5~3.2)
Wearing Resistance		★★★	★★	★★★	★★★★
Corrosion Resistance		★★	★★★	★★★	★★★
Alloy Thickness		2~3mm	1.5~2mm	1.5~2mm	1.5~2mm
Hardness		HRC 58-65	HRC 50-58	HRC 55-60	HRC 55-65
Temperature Range		≤400	≤450	≤450	≤600
Coefficient Thermal	RT~250℃	11.0x10-6	11.0x10-6	11.5x10-6	11.0x10-6
Expansion(/℃)	RT~400℃	11.4x10-6	11.4x10-6	12.4x10-6	12x10-6
Range of Workable Length		700mm~3000mm/piece
Base Steel Vastly Used		40Cr: 42CrMo
Mark in the list: ★★★★ Excellent; ★★★ Very Good; ★★Good

Bimetallic Screws
Suitable for	Single Screw, Twin Parallel Screw, Twin Conical Screw
Alloy Type	Ni60	CoImonoy 56	CoImonoy 83
Alloy Components	Ni+Cr+Fe+Si (Ni:65, Cr:17, Fe:15, Si:5)	Ni+Cr+Si+Fe (Ni: 68, Cr:18, Si:5, Fe:5)	Ni+Wc+Cr+C (Ni:40, Wc:34, Cr:20, C:2)
Anti-Wearing Level	★★★	★★★	★★★★
Anti-Corrosion Level	★★★★	★★★★	★★★★
Alloy Thickness	1~1.5mm	1~1.5mm	1~1.5mm
Hardness	HRC 56-62	HRC 46~61	HRC 43-48
Applied Glass Fiber	Under 10%
Range of Workable Length	Any length needed
Base Steel Vastly Used	38CrMoAI(1.8509), 34CrAINi7(1.8550), 31CrMoV9(1.8519)
Mark in the list: ★★★★ Excellent; ★★★ Very Good; ★★Good

Quality Inspection

Quality is a very important step during production. For making a quality screw barrel, all tolerances should be fulfilled and all dimensions should be correct and put in records.

We provide inspection report, material certificate for every of our supplied screw barrels.

Packaging

Packaging is the last but very important step before shipping. A strong and smart packing box is also part of our quality. It is not only used to protect the screws barrels well during transportation, also provide an easy way for our customer to unpack.