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[ 01 ]
Nitridedcylinders

We offer a wide range of nitrided cylinder materials.

[ 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.

Material table for 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, which is sufficient for standard polymers without fillers and has a good lifetime price ratio. For specific cases with small diameters, hardened materials can also be used.

  • DIN standard
    Material
    Type steel
    Treatment
    Hardness
    Abrasion resistance
    (x good) to (xxxxx excellent)
    Corrosion resistance
    (x good) to (xxxxx excellent)
  • 1.8509
    41CrAlNi7-10
    Nitriding steel
    Nitrided
    >850 HV1
    +
    +
  • 1.8519
    31CrMoV9
    Nitriding steel
    Nitrided
    >700 HV1
    +
    +
  • 1.8550
    34CrAiNi7-10
    Nitriding steel
    Nitrided
    >850 HV1
    +
    +
  • 1.2379
    X155CrVMo121
    Hardening steel
    Hardened
    59 - 63 HRC
    +++
    ++
  • -
    KPM1
    Hardening steel PM
    Hardened
    58 - 63 HRC
    ++++
    +++
  • -
    KPM2
    Hardening steel PM
    Hardened
    55-60 HRC
    ++++
    +++++
1.8509
  • Din standard
    1.8509
  • Material
    41CrAlNi7-10
  • Type steel
    Nitriding steel
  • Treatment
    Nitrided
  • Hardness
    >850 HV1
  • Abrasion resistance
    +
  • Corrosion resistance
    +
1.8519
  • Din standard
    1.8519
  • Material
    31CrMoV9
  • Type steel
    Nitriding steel
  • Treatment
    Nitrided
  • Hardness
    >700 HV1
  • Abrasion resistance
    +
  • Corrosion resistance
    +
1.8550
  • Din standard
    1.8550
  • Material
    34CrAiNi7-10
  • Type steel
    Nitriding steel
  • Treatment
    Nitrided
  • Hardness
    >850 HV1
  • Abrasion resistance
    +
  • Corrosion resistance
    +
1.2379
  • Din standard
    1.2379
  • Material
    X155CrVMo121
  • Type steel
    Hardening steel
  • Treatment
    Hardened
  • Hardness
    59 - 63 HRC
  • Abrasion resistance
    +
    +
    +
  • Corrosion resistance
    +
    +
-
  • Din standard
    -
  • Material
    KPM1
  • Type steel
    Hardening steel PM
  • Treatment
    Hardened
  • Hardness
    58 - 63 HRC
  • Abrasion resistance
    +
    +
    +
    +
  • Corrosion resistance
    +
    +
    +
-
  • Din standard
    -
  • Material
    KPM2
  • Type steel
    Hardening steel PM
  • Treatment
    Hardened
  • Hardness
    55-60 HRC
  • 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 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 300°C
    250 N/mm2
  • Application
    Extrusion
KB 37
  • Type
    KB 37
  • Yield point 300°C
    370 N/mm2
  • Application
    Extrusion
KB 63
  • Type
    KB 63
  • Yield point 300°C
    630 N/mm2
  • Application
    Injection
KB 13
  • Type
    KB 13
  • Yield point 300°C
    130 N/mm2
  • Application
    Extrusion
KB 48
  • Type
    KB 48
  • Yield point 300°C
    480 N/mm2
  • Application
    Extrusion & Injection

Examples cylinders

Based on all material and treatment options we selected some examples screw configuration versus polymer processing.

Nitrided Cylinder

Nitrided Cylinder for polymers without or with low % fillers.

Details
Nitrided Cylinder
Contact us
  • Layer
    1,8509
  • Alloy components
    Cr - Al - Mo
  • Hardness [HRC]
    950-1100 Hv (ca 65-67 Hrc)
  • Diameter [mm]
    Ø40
  • Abrasion resistance
    +
  • Corrosion resistance
    +
Bimetallic Cylinder KB100/109

Bimetallic Cylinder for polymers with fillers till 30%.

Details
Bimetallic Cylinder KB100/109
Contact us
  • Layer
    KB100/KB109
  • Alloy components
    Fe - Cr
  • Hardness [HRC]
    58 - 69
  • Diameter [mm]
    Ø 50
  • Abrasion resistance
    +
    +
    +
  • Corrosion resistance
    +
    +
    +
Bimetallic Cylinder KB300/350

Bimetallic Cylinder for polymers with fillers above 30%.

Details
Bimetallic Cylinder KB300/350
Contact us
  • Layer
    KB300/KB350
  • Alloy components
    Ni - Tungsten carbide
  • Hardness [HRC]
    60 - 66
  • Diameter [mm]
    Ø 35
  • Abrasion resistance
    +
    +
    +
    +
    +
  • Corrosion resistance
    +
    +
    +
    +
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