Cast iron GJL250
This pearlitic lamellar cast iron turns out to be a good compromise between wear resistance, strength and machinability, making it one of the most widely used cast irons.
The identifying feature of cast iron GJL250 is the graphite structure that solidifies in the form of lamellae, generating a discontinuity of the ferrous part of the alloy.
Areas of Application
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Grids
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Distributors
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Pump body
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Racing parts
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Engine shields
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| GJL250 (G25) | ||
|---|---|---|
| Hardness HB (30) | 170 - 240 | |
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Testing load Rm N/mm2 |
250 | |
| Yield strength Rp 0,2 | - | |
| Enlong. A % | 1 - 3 | |
| Structure | Pearlitic | |
| Graphite | Lamellar | |
| Wall thickness Determinant [mm] |
5 |
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Predicted tensile strength Rm (on sample) [N/mm2] |
from 250 to 350 | |
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Predicted tensile strength Rm (on test) [N/mm2] |
- |
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| Predictable tensile strength Rm (tested) [N/mm 2] |
250 225 195 170 155 |
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The above data are intended as a guideline since they can be found only on standard specimens automatically cast on sand molding plant. The values actually found on a casting depend strongly on the thickness of the element under consideration and the morphology of the casting (in fact, these two aspects jointly determine the cooling curves and thus the set of mechanical characteristics).
Cast iron prototype creations
