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ASTM C1440-17
ASTM C1440-17 Standard Specificati- on ...
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ASTM D1439-15
ASTM D1439-15 Standard Test Methods ...
1.1 ,These test methods cover the chemical analysis of manganese-copper alloys having chemical compositions within the following limits:
| Element | Range, ,% |
| Copper | 68.0 to 72.0 |
| Manganese | 28.0 to 32.0 |
| Carbon | 0.03 max |
| Iron | 0.01 max |
| Phosphorus | 0.01 max |
| Silicon | 0.05 max |
| Sulfur | 0.01 max |