Indutherm MC60V - To Find out the Weight of the Metal

System
description
sales@romanoff.com | www.romanoff.com
2019-01-08
4–15
4.11 To find out the weight of the metal
All rubber bases must be determined on a scale. Write exact weight on this rubber bases
by a felt pen.
After mounting the tree, take the total weight. Deduct the rubber base weight from the total
weight = net wax weight. To simplify matters we assume the specific weight of wax as 1.
Metal weight is calculated by multiplying wax weight by the specific weight of the metal:
Metal
Spec. weight in g/cm³
Water, wax
1.00
Aluminium
2.70
Steel
7.85
Brass
8.40
Bronze
8.80
Silver
10.50
Nickel silver
8.40
Gold 333
10.90
Gold 585
13.70
Gold 750
15.20
Gold 900
17.40
Example:
Complete weight (wax + rubber base) 43.5 g less weight of rubber base 38 g = 5.5 g wax.
5.5 g wax means
Metal
Wax weight in g x Specific weight
Metal weight in g
Silber
5.5 g x 10.5
57.75
Gold 750
5.5 x 15.20
83.60
 After the calculation: Place flask cylinder and fix it carefully on the rubber base. Do
not touch wax pieces. Mark the rubber bases clearly to avoid confusion when you
prepare several flasks!