Technical for Cylinder Liners,
Sleeves & Blocks
Raw Material

Raw Material

Normal composition of casting as per A-159 (G-1800 to G-4000) grade.

Constituents Composition (Min – Max)
Carbon 3 to 3.5 %
Silicon 1.8 to 2.4 %
Manganese 0.60 to 1 %
Sulphur 0.15 Max
Phosphorous 0.20 to 0.40 %
Chromium As required
Moly As required
Copper As required
Nickel As required

Process - Centrifugal Casting and Shell Moulding.

Hardness - Min 200 BHN – Max 260 BHN or Min 95 HRB – Max 103 HRB.

Tensile Strength - kgf / mm2 – min 25.

Micro Structure

  • Matrix - Pearlite
  • Graphite – A & B Type
  • Free Ferrite – Max. 5%
  • Free Carbide – Max. 5%

Dimensions

Constituents
Full Finish Semi Finish
Dry & Wet Type Wet Type Dry Type
Inner Diameter 40 - 250 mm 40 - 250 mm 40 - 325 mm
Outer Diameter 45 - 350 mm 45 - 350 mm 45 - 350 mm
Length Up to 375 mm Up to 550 mm Up to 700 mm

Geometrical Parameters

Ovality / Roundness (Circularity) - Within 1 thou
Perpendicularity - Within 1 thou
Taper - Within 1 thou
Angularity - Within 1 thou
Cylindricity - Within 1 thou
Concentricity - Within 1 thou

Micro Structure

  • Phosphating / Blackening
  • Chrome Plating (Inner and Outer diameter)
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