Cast Iron ASTM Grade 40, GR40

Cylinder Liners & Sleeves


Cylinder Liners are made of gray cast-iron, ought to have desired casting and machining qualities, viz. strength, toughness, hardness and wear resistance.

These are mainly of two types – Dry liner and Wet liner.

The liners are ‘cast-in fit’, force (press) fit or slip fit.

The interference between its outer diameter and bore-hole walls depends on fit-type from 0.050 to 0.075 mm. These are available in wide range suitable for light, medium and heavy duty application.

In order to meet with industrial quality standards, we manufacture these liners from sand casting and centrifugal casting, which enables us to maintain the uniform hardness all over. Apart from this, we also keep into consideration various factors including distortion-less bore and low thermal expansion to meet with the requirements of our clients. These liners are available in semi finished as well as full finished sizes. Cross honing is done on the full finished products to make the inner bore distortion-less. The inner bores are cross honed to provide maximum smoothness to the surface, that in turn reduces friction, when this inner bore is contacted with Piston Rings.

WET CYLINDER LINERS manufactured by the "CENTRIFUGAL CAST PROCESS" is acknowledged to be the best method. It possesses the bearing metal qualities that cause skin healing after abrasion and a structure that is readily wetted by oil and retains an oil film. Corrosion resistance is further improved by adding Chromium in the metal.

We also accept the customized orders of our clients and manufacture these products in accordance with the samples and drawings with the given material & coating.


  • Centrifugally cast cylinder liners of actual quality along with precise machining.
  • A very good plateau honing and cylindrical grinding that matches the geometrical parameters.
  • Manufactured with chromium and nickel elements maintaining the BS4K6 material standard.
  • Stringent material along with microstructure analysis of all the batches individually.
  • Complete dimensional inspection of the finished components included in the process.
  • Inspection of honing angle, structure and surface roughness at a random.
  • Tests of profiles, tensile strength and crack detection at regular intervals in a random way.
  • Manufacturing experience for the past 25 years and an expertise with single roof manufacturing outlet.
  • A very wide range and suitable for up to 1500 models for worldwide cars, trucks, tractors and industrial engines.
  • Can produce liners in bulk as well as small quantity in our patch production unit.

In the centrifugal casting process, the molten metal is poured into a metal mould or die which is revolving at a high speed. The centrifugal force causes the metal to distribute itself evenly around the die. The resulting casting are of much finer grain and free from blow holes or porosity. A further important advantage is that the impurities, being lighter than the iron, are forced centrifugally to the bore surface from which they are removed by machining.

  • The centrifugal casted liners are 10% heavier than sand casted liners, because they are close grained, & hence more durable
  • They increase the life span of engines by 25% to 30%
  • These liners have less wear along with scuff resistance for a longer period
  • They can give better life to your vehicles with molly hard rings and molly hard liners.

High endurance
Robust design
Corrosion resistance

Product Range

  • Cast Iron Cylinder Liner
  • Wet Cylinder Liner
  • Dry Cylinder Liner
  • Phosphated Cylinder Liner
  • Chromed Cylinder Liner
  • Air Cooled Cylinder Liner
  • Water Cooled Cylinder Liner
  • Finned Cylinder Liner

Semi-finished & Fully-finished

Technical Specifications

Material specification standards

India IS-FG 220
Europe GG20, GG25, GG30
American ASTM, A48

Micro Structure

Graphite type: "A" & "B" ("D" & "E" Random)
Flake Size: 4-6 Microns
Free Ferrite: Less Than 5%
Matrix Lamellar Pearline

Chemical Composition Minimum Maximum
Carbon 2.90 3.50
Silicon 1.80 2.50
Manganese 0.6 1.00
Phosphorus 0.20 0.50
Phosphorus 0.00 0.12

Note: Also we can add cast material compositions using Chromium, Molybdenum, Nickel, Cooper as per customer specifications meeting to international standards.

Hardness (BHN) 210 to 280
Tensile (BHN) 210 to 280 n/mm2

Cast Iron ASTM Grade 40, GR40
Mfg Process
Sand Casting, Centrifugal Casting
Honned, Polished, Grinning, Chromed, Nitrated
Anti Corrosive, Fine Finished, High Quality
Pistons for Cars, Trucks, Tractors, Marine Engine, Earth Movers, Compressors
Outside Dia.
50 mm to 700 MM Dia
Max Length
1500 mm
1000 Kg
Dimension Range (in mm)
Bore Diameter 55 to 200
Outer Diameter 60 to 230
Total Length 110 to 300


Brandon Kelley 27 Aug 2019
Nice !
Roy Banks 27 Aug 2019
Nice !
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