Silver Casting Alloy 925 for Open or Closed systems and for casting with Stones in place.
Density: 10,19 g/cm³Hardness (as cast): 62 HV
Hardness (after annealing): 60 HV
Hardness (after age hardening): 115 HV
DIRECTIONS FOR SUGGESTED USE
Melting temperature: 890 °C
Casting temperature:
100 °C over its melting temperature to cast with centrifugal machines.
120 °C over its melting temperature to cast in vacuum machines with controlled atmosphere.
140 °C over its melting temperature to cast in outdoor cylinders with vacuum.
Cylinders temperature: from 550 °C to 650 °C depending on the machine and
objects dimensions.
Cooling casted objects: in water after 10 minutes.
Cooling casted objects (with stones): in water after 30/40 minutes.
Annealing: 650 °C for 20 minutes followed by a quick cooling in hot
water (40 °C min.)
Age hardening: step 1: solubilization
700 °C for 30 minutes followed by quick cooling in hot
water (min. 40 °C), better if with alcohol.
step 2: hardening
300 °C for 2 hours. Cooling at room temperature.
