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| Technical Specifications |
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| Material |
| Our 'Bluestar' Cylinder liners are manufactured from standard quality close grained cast iron. Our casting is produced by centrifugal process. Commercial Cast Irons are alloys of Iron, Carbon and Silicon. We have achieved better hardness, machinability, tensile strength and wear-resistance by further alloying with Chromium Copper, Nickel, Molybdenum, Vanadium & Stresses Relieving to suit the specifications of our customers. |
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| Hardness |
| Soft Cylinder Liners: According to ASTM 'Bluestar' liners maintain the hardness of 210 to 280 BHN and can give more as per specification of customers |
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| Microstructures |
| By controlled manufacturing process, we have achieved on 'Bluestar' Liners ASTM standard type “A” of graphite flakes size 4 to 6, pearlitic structure with percentage of ferrite less than 5% and uniform distribution of phosphide eutectic as ASTM specification. |
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| Chemical Analysis |
| Chemical composition confirms to the BIS, B.S.S., D.I.N., mm specifications. We maintain the specifications as given by our customers. In the absence of specifications received from customers, we generally maintain ASTM Standards. |
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| Constituents |
(Material composition) |
| Total Carbon |
3.0 to 3.3 % |
| Silicon |
1.8 to 2.2 % |
| Manganese |
0.6 to 1.2 % |
| Phosphorous |
0.100 to 0.650 % |
| Sulphur |
0.100 MAX. |
| Chromium |
0.25 to 0.50 % |
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| Tensile Strength |
| We are able to manufacture the materials of Bluestar liners with tensile strength 200 to 300 N/mm2 |
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| Surface Finish |
| The surface roughness on the finish machined liners are in accordance with the following: Outer surface fitment size (turned): Max. 6.00 Rz. |
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| Plateau Honing Bore |
Ra- 0.4 to 0.8 µm, Rz- 4.0 to 7.0 µm, Rt- 6.0 to 12.0, Bearing ratio at 2µm 70% to 85% all other parameters we maintain such as R3z, Rms, Rpk, Rvk, Mr1, Mr2, Vo etc as per customers specification.
Our 'Bluestar' Cylinder liners bores are 'Plateau' honed result into excellent wear-resistance & lubricating profile. |
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