Malleable cast iron 70-2 vs Malleable cast iron 80-1.5
Property comparison of Malleable cast iron 70-2 and Malleable cast iron 80-1.5, both cast iron.
| Property | Malleable cast iron 70-2 | Malleable cast iron 80-1.5 | Difference |
|---|---|---|---|
| Yield strength | 410 MPa | 470 MPa | +15% |
| Tensile strength | 686 MPa | 784 MPa | +14% |
| Elongation | 2 % | 1.5 % | -25% |
| Elastic modulus | 160,000 MPa | 160,000 MPa | 0% |
| Shear modulus | 64,000 MPa | 64,000 MPa | 0% |
| Poisson ratio | 0.25 | 0.25 | 0% |
| Density | 7,160 kg/m³ | 7,160 kg/m³ | 0% |
| Brinell hardness | 263 HB | 295 HB | +12% |
| Thermal conductivity | 50 W/m·K | 50 W/m·K | 0% |
| Specific heat | 460 J/kg·K | 460 J/kg·K | 0% |
| Coefficient of thermal expansion | 0.000012 1/K | 0.000012 1/K | 0% |
| Melting point | 1,200 °C | 1,200 °C | 0% |
Difference is Malleable cast iron 80-1.5 relative to Malleable cast iron 70-2. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- GOST
- standard
- GOST
About malleable cast iron
Malleable iron is produced by annealing white iron castings to convert the carbon to temper-carbon nodules. The result is more ductile than gray iron and was historically used for pipe fittings, hand tools, and small machine parts. It has largely been displaced by ductile iron for new designs but is still specified for legacy applications.
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