System
description
[email protected] | www.romanoff.com
2019-10-16
4
–27
Standard-burnout-cycle phosphate bonded: (from investment to casting 5 hrs)
Resting time after investment 1 hr,
in 1 hr (5 °C/min) to 300 °C, holding time 30 min,
in 2 hrs (5 °C/min) to 900 °C, holding time 30 min (with flasks Ø 65 mm x 80 mm and Ø 80
mm x 80 mm should the holding time be extended to 60 min).
Rapid-curve phosphate- bonded investment: (from investment to casting 2 hrs 15
min)
Resting time after investment 30 min, in 75 min (12 °C/min) to 900 °C, holding time 30 min
(with flasks Ø 65 mm x 80 mm und Ø 80 mm x 80 mm should the holding time be extend-
ed to 60 min).
4.20
Flask temperatures
The casting temperature depends on metal alloy and style of castings.
High melting point of metal needs high flask temperatures, thin and delicate pieces with
long flow ways too.
Low melting point of metal needs lower flask temperatures, heavier massive pieces too.
Ask metal supplier about their recommendation.
List of metals and recommended casting temperatures
Flask temperature in °C
Metal
Casting temperature
in °C
Pieces
thin
Pieces me-
dium
Pieces
heavy
Aluminium
720
300
250
200
Silver 925
980
650
600
400-600
Y. gold 14 kt
950
620
600
400-600
Y. gold 18 kt
1050
620
600
400-600
W. gold 18 kt
1150
620
600
400-600
W. gold 18 kt Pd
1300
650
630
400-600
Steel
900
800
700
Palladium
950
900
870
Platinum
950
900
850
