L128/RZ5 datasheet
Magnesium Casting Alloy
| This Alloy Conforms To BS BS LM4 . BS1490:1988 | ||
| Chemical Composition | ||
| Min | Max | |
| Rare Earth Metals | 0.8 | 1.7 |
| Zinc | 3.5 | 5.0 |
| Zirconium | 0.4 | 1.0 |
| Manganese | 0.15 | |
| Copper | 0.03 | |
| Silicon | 0.01 | |
| Iron | 0.01 | |
| Nickel | 0.005 | |
| Magnesium | 0.1 | Remainder |
Heat Treatment |
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| Mechanical Properties Test values specified for requirements of British Standard L101 and shall not be less than the following values. |
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| 0.2% Proof Stress (N/mm²) | 135 | |
| Tensile Stress (N/mm²) | 200 | |
| Elongation (%) | 3 | |
| Brinell Hardness | 60-80 | |
| Shear Strength (N/MM2) | 150 | |
| Physical Properties | ||
| Specific Gravity | 1.81 | |
| Coefficient of thermal expansion | 27.1 x 10 K | |
| Thermal Conductivity | 109 Wm K | |
| Specific Heat | 960 Jkg K | |
| Electrical Resistivity | 68 nWm | |
| (Add the missing values i.e. N/mm squared, 10 to –6 K to –1, Wm to –1 K to –1, Jkg to –1 K to –1) | ||