THE ARGEN CORPORATION

Alloy Specification Sheet

Norme BS EN ISO 22674

Argenco 40Y

 

Color: RICH YELLOW ISO Type: 2/4 ADA Classification: NOBLE (N) PGM: 39.9%

Metal Content %

Au Pd Ag Ir In Cu Zn Li
39.9 4 45.99 x 1.5 7.59 1 x

'x' denotes a content of less than one percent

Thermal Properties

Melting Range
Casting Temperature
Density g/cm3
1580-1700 ºF
1800 ºF
12.4
860-925 ºC
980 ºC

Mechanical Properties

Vickers Hardness (VHN)

Yield Strength N/mm2

(0.2% Offset)

Modulus of Elasticity

(GPa)

Elongation

%

81
Soft
Hard
Soft
Hard
Soft
Hard
125
215
248
552
30
13

 

PROCESS
INSTRUCTIONS FOR USE

Modeling Maintain a minimum wax thickness of 0.3 to 0.4 mm.

Spruing (Single Crowns) Use direct sprues, 8-10 gauge, (3.3-2.6 mm diameter) and 1/2 in. (12 mm) long with adequate reservoirs. There should be no more than 1/4 in. (6 mm) of investment from the top of the pattern to the top of the investment.

Spruing (Multi-Units & Bridges) Use a 6 gauge (4.1 mm diameter) runner bar, connecting the units to the bar with 10 gauge (2.6 mm diameter) sprues 1/8 in. (3 mm)long and joining the bar to the sprue base with 8 gauge (3.3 mm diameter) and 1/2in. (12 mm) long sprues coming from a domed central entry point. There should be no more than 1/4 in. (6 mm) of investment from the top of the pattern to the top of the investment.

Alloy Quantity 12.4g/cm3 * (Wax Weight) = Required Alloy Quantity.

Investing Use debubblizer and blow off any excess before investing. Do not preheat Cristobolite investment above 1290°F/700°C. Recommended Investment: Gypsum or Phosphate Bonded Follow the manufacturer's instructions.

Burnout After adequate set-up time, place the ring(s) in a room temperature oven and raise the temperature to 650-705 °C / 1200-1300 °F, hold for 1 hour plus 10 minutes for each additional ring. If you are using a rapid fire investment, follow the manufacturer's instructions.

Reusing Cast Alloy Use only clean buttons and at least 35 percent new alloy.

Crucible Type Graphite

Torch Casting Crown & Bridge Alloys can be cast with compressed air and natural gas using a borax flux for optimum results.

Induction or Electrical Casting For gold-based alloys, use a graphite lined crucible and a casting temperature of at least 212ºF/100°C over the liquidus temperature. Every casting machine is different. The casting temperature may require adjustment based upon the alloy and the amount of metal being cast.

Cooling Either allow the casting ring to cool to room temperature for self hardening, or quench the casting ring in water after the alloy glows dull red to soften.

Divesting and Cleaning Divest and sandblast with 50 micron aluminum oxide, be careful of margins.

Pickling Any gold pickling solution may be used for the gold-based alloys.

Soldering Check that the solder joints are sufficiently large (6-9 mm). Soldering gap approximately 0.05-0.2 mm. The soldering surfaces should be parallel and pre-polished. Allow the soldered case to cool slowly after soldering.

Recommended Solder

Use: LO

 


Hardening Heat Treat for 15 min. at 350C / 660 F

Softening

 


Laser Wire LWO75

 

Polishing Polish with any convential polishing brushes and felt wheels using Tripoli ,rouge and tin oxide. Soft, medium bristles, chamois, or rag wheels are acceptable.

Print Date 9/25/2021