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to Properties of steels and cast irons
(submitted by the website administration)
| Grey cast iron ASTM 40 | ||||
| Chemical composition: C=2.7-4%, Mn=0.8%, Si=1.8-3%, S=0.07% max, P=0.2% max | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 7.06 *10³-7.34 *10³ | kg/m³ | 441-458 | lb/ft³ |
|---|---|---|---|---|
| Modulus of elasticity | 124 | GPa | 18000 | ksi |
| Thermal expansion (20 ºC) | 9.0*10-6 | ºCˉ¹ | 5.0*10-6 | in/(in* ºF) |
| Specific heat capacity (25 ºC) | 490 | J/(kg*K) | 0.117 | BTU/(lb*ºF) |
| Thermal conductivity | 53.3 | W/(m*K) | 370 | BTU*in/(hr*ft²*ºF) |
| Electric resistivity | 1.1*10-7 | Ohm*m | 1.1*10-5 | Ohm*cm |
| Tensile strength | 276 | MPa | 40000 | psi |
| Elongation | 1 | % | 1 | % |
| Shear strength | 400 | MPa | 58000 | psi |
| Compressive yield strength | Min. 827 | MPa | Min. 120000 | psi |
| Fatigue strength | 138 | MPa | 20000 | psi |
| Hardness (Brinell) | 180-302 | HB | 180-302 | HB |
| Wear resistance | Low | |||
| Corrosion resistance | Low | |||
| Weldability | Low | |||
| Machinability | Good | |||
| Castability | High | |||