Single screw cylinders

[ 01 ]

Nitrided Cylinders

We offer a wide range of nitrided cylinders.

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[ 02 ]

Hardened Cylinders

We offer a wide range of hardened cylinders for small diameters.

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[ 03 ]

Bimetallic Cylinders

Top grade of our solutions and commonly used are our bimetallic cylinders.

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[ 04 ]

The advantage of our bimetallic alloys

The advantage of our bimetallic alloys is the high and homogeneous hardness throughout the whole layer thickness, which ranges from 1.5 to 2 mm thickness. The lifetime increase of the bimetallic cylinder against a nitrided cylinder may exceed 12 times or more. The price-quality-lifetime ratio is therefore very beneficial for the bimetallic cylinder. We have five different alloy solutions listed in the table below. We qualified the different alloys according to abrasion and/or corrosion resistance to enable a quick selection.

The advantage of our nitrided and hardened cylinders

The nitrided cylinder obtains its wear resistance from a thin, hard top layer of 0.3-0.4 mm applied by gas treatment. It is sufficient for standard polymers without fillers and offers a good lifetime-to-price ratio. Hardened materials can also be used for specific cases with small diameters.

MM Code

Base Material

Treatment

Abrasion resistance

(x good) to (xxxxx excellent)

Corrosion resistance

(x good) to (xxxxx excellent)
MM31

Quenced and Tempered

Nitriding

+

+
MM41

Quenced and Tempered

Nitriding

+

+
MM34

Quenced and Tempered

Nitriding

+

+

MM31

MM Code

MM31
Base Material

Quenced and Tempered
Treatment

Nitriding
Abrasion resistance

+
Corrosion resistance

+

MM41

MM Code

MM41
Base Material

Quenced and Tempered
Treatment

Nitriding
Abrasion resistance

+
Corrosion resistance

+

MM34

MM Code

MM34
Base Material

Quenced and Tempered
Treatment

Nitriding
Abrasion resistance

+
Corrosion resistance

+

Bimetallic alloys table

We qualified the quality of the different alloys according to abrasion and or corrosion resistance to enable a quick selection.
KB100/109 are general-purpose alloys, and KB300/350 are alloys for heavy wear applications. See also our material selector.

Type

Alloy

Alloy components

Hardness [HRC]

(a) Hardness of matrix, tungsten carbides have a hardness of 89 HRC.

Abrasion resistance

(x good) to (xxxxx excellent)

Corrosion resistance

(x good) to (xxxxx excellent)
KB 100

Fe

Ni - C - B

58 - 65

++

+
KB 109

Fe - Cr

Ni - Mo - Cu - C - B

64 - 69

+++

+++
KB 200

Ni - Co

Cr - Mo - B

48 - 56

+

+++++
KB 300

Ni

Cr - Ni - Co - B - W

60 - 66 (a)

++++

++++
KB 350

Ni

Cr - Si - B - W

60 - 66 (a)

+++++

++++

KB 100

Type

KB 100
Alloy

Fe
Alloy components

Ni - C - B
Hardness [HRC]

58 - 65
Abrasion resistance

+
+
Corrosion resistance

+

KB 109

Type

KB 109
Alloy

Fe - Cr
Alloy components

Ni - Mo - Cu - C - B
Hardness [HRC]

64 - 69
Abrasion resistance

+
+
+
Corrosion resistance

+
+
+

KB 200

Type

KB 200
Alloy

Ni - Co
Alloy components

Cr - Mo - B
Hardness [HRC]

48 - 56
Abrasion resistance

+
Corrosion resistance

+
+
+
+
+

KB 300

Type

KB 300
Alloy

Ni
Alloy components

Cr - Ni - Co - B - W
Hardness [HRC]

60 - 66 (a)
Abrasion resistance

+
+
+
+
Corrosion resistance

+
+
+
+

KB 350

Type

KB 350
Alloy

Ni
Alloy components

Cr - Si - B - W
Hardness [HRC]

60 - 66 (a)
Abrasion resistance

+
+
+
+
+
Corrosion resistance

+
+
+
+

Backing material table

Like 5 different bimetallic alloys, we are also working with different backing materials. The selection for the right backing material is made based on internal process pressure and cylinder design. The different material options guarantee a flawless use of the cylinder.