Upcoming events
29th Fakuma 2024 — October 15 - 19, 2024
The K Show at Stand A03 in Hall 10- Dusseldorf, Germany — October 08 - 15, 2025
[ 01 ]
Nitrided Cylinders

We offer a wide range of nitrided cylinders.

[ 02 ]
Hardened Cylinders

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

[ 03 ]
Bimetallic Cylinders

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

[ 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 quality of the different alloys according 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 has a good lifetime 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 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 also working with different backingmaterials. The selection for the right backing material is made on internal process pressure and cylinder design. The different material options garantee a flawless use of the cylinder.

  • Type
    Yield point at 300°C
    Application
  • KB 25
    250 N/mm2
    Extrusion
  • KB 37
    370 N/mm2
    Extrusion
  • KB 63
    630 N/mm2
    Injection
  • KB 13
    130 N/mm2
    Extrusion
  • KB 48
    480 N/mm2
    Extrusion & Injection
KB 25
  • Type
    KB 25
  • Yield point at 300°C
    250 N/mm2
  • Application
    Extrusion
KB 37
  • Type
    KB 37
  • Yield point at 300°C
    370 N/mm2
  • Application
    Extrusion
KB 63
  • Type
    KB 63
  • Yield point at 300°C
    630 N/mm2
  • Application
    Injection
KB 13
  • Type
    KB 13
  • Yield point at 300°C
    130 N/mm2
  • Application
    Extrusion
KB 48
  • Type
    KB 48
  • Yield point at 300°C
    480 N/mm2
  • Application
    Extrusion & Injection

Example Cylinders

Nitrided Cylinder
Details
Nitrided Cylinder
Contact us
  • Layer
    1,8509
  • Alloy components
    Cr - Al - Ni
  • Hardness [HRC]
    950-1100 Hv (65-67 Hrc)
  • Diameter [mm]
    Ø 55
  • Abrasion resistance
    +
  • Corrosion resistance
    +
Bimetallic Cylinder KB100/109
Details
Bimetallic Cylinder KB100/109
Contact us
  • Layer
    KB109
  • Alloy components
    Fe - Cr
  • Hardness [HRC]
    64 - 69
  • Diameter [mm]
    Ø 200
  • Abrasion resistance
    +
    +
    +
  • Corrosion resistance
    +
    +
    +
Bimetallic Cylinder KB300/350
Details
Bimetallic Cylinder KB300/350
Contact us
  • Layer
    KB350
  • Alloy components
    Ni - Tungsten carbide
  • Hardness [HRC]
    60 - 66
  • Diameter [mm]]
    Ø 150
  • Abrasion resistance
    +
    +
    +
    +
    +
  • Corrosion resistance
    +
    +
    +
    +
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