FINDING THE APPROXIMATE PROPORTIONATE WEIGHT OF CASTINGS TO
OPTAIN THE APPROXIMATE WEIGHT OF A CASTING. SIMPLY
MULTIPLY THE
WEIGHT OF THE PATTERN BY THE METAL FACTOR FROM THE TABLE.
EXAMPLE: IF THE GIVEN WEIGHT OF A PINE PATTERN IS 4 lbs.
WHAT IS THE WEIGHT OF A SOLID IRON CASTING OBTAINED FROM THIS PATTERN?
ANSWER: 4 X 18 = 64LBS
FACTORS FOR FINDING THE APPROXIMATE PROPORTIONATE WEIGHT OF CASTINGS
A PATTERN WEIGHING |
1 POUND MADE OF
| 1 POUND MADE OF | CAST IRON | BRASS | BRONZE | ALUMINUM | MAGNISIUM |
| PINE | 18.0 | 18.8 | 19.6 | 5.7 | 3.8 |
| MAHOGANY | 11.7 | 13.6 | 14.3 | 4.2 | 2.8 |
| BIRCH | 10.6 | 12.3 | 13.0 | 3.8 | 2.6 |
| ALUMINUM | 2.85 | 3.3 | 3.5 | 1.0 | .69 |