Firmilay
High Gold Alloys for Crown and Bridge
| Color | YELLOW |
| Type | 2/3 |
| ADA Class | HIGH NOBLE (HN) |
|
Application
|
|
| Processing | |
|---|---|
| Investment | Gypsum or Phosphate Bonded |
| Crucible | Graphite / Ceramic |
| Degassing Temp C | |
| Oxidation Procedure |
| Solder & Laser Wires | |
|---|---|
| PreSolder | --- |
| PostSolder | 615, 650, 720 |
| Laser Wire | LWO75 |
| Physical Properties | |
|---|---|
| VHN After Firing | |
| VHN Soft | 121 |
| VHN Hard | 182 |
| Proof Stress Soft MPa | 207 |
| Proof Stress Hard MPa | 276 |
| Tensile Strength Soft MPa | 434 |
| Tensile Strength Hard MPa | 531 |
| Elongation Soft | 39 |
| Elongation Hard | 19 |
| Elastic Modulus GPa | 76 |
| Composition | |
|---|---|
| Silver (Ag) | 11.0 |
| Gold (Au) | 74.5 |
| Copper (Cu) | 10.5 |
| Palladium (Pd) | 3.5 |
| Iridium (Ir) | 0.01 |
| Zinc (Zn) | 0.5 |
| Thermal Properties | |
|---|---|
| Melting Range C | 930-960 |
| Casting Temp C | 1040 |
| Density g/cc | 15.5 |
| Expansion at 500C | |
| Expansion at 600C | |
| Burnout Temp C | 650 |