 |
KERAMIT
450 + HV |
|
|
| PFM ALLOYS |
 |
|
KERAMIT 450 + HV is a gold-palladium-silver
alloy, references from many years
for the national and international
markets. |
| White
colour |
|
|
|
Chemical composition |
| Au |
Pd |
Ag |
In |
Sn |
Ga |
Re |
Ru |
Au&PGM |
| 45.0% |
38.9% |
5.0% |
8.6% |
x |
1.4% |
x |
X |
84.2% |
|
X=<1,0%
|
| Technical
data: |
|
Density
g/cm³ |
13.6 |
Yield strength MPa |
550
- 600 |
|
Melting range °C |
1215-1305 |
Elongation % |
19 - 10 |
|
Casting temperature°C |
1400 |
Tensile strength MPa |
780 - 800 |
|
TEC 25-500°C-25-600°C 10-6K-1 |
13.8-14.2 |
Vickers hardness HV5/30 |
240 - 270 |
|
Modulus of elasticity GPa |
112 |
Crucible |
ceramic |
|
| Solders |
| Pre-solder |
SOLDER 1120 (1145°C) |
| Post-solder: |
SOLDER K 10/5 (750°C) Z - SOLDER LFC
(650°C) |
|
| Corrosion
resistance |
The electrochemical properties of this alloy were
evaluated in an electrochemical cell built according
to standards defined in ISO 10271.
The following results were obtained: |
| Eocp
= 92 mV |
Ep = 799 mV |
I300
= 2.88µA◦cm-² |
Ip = 7.0µA◦cm-² |
|
| The high
value of the breakdown potential (Ep 799 mV) with
the low current density at 300 mV (I300
= 2.88µA◦cm-²) indicate the excellent
corrosion resistance of this alloy. |
| Cytotoxicity
testing |
| Cytotoxicity
of KERAMIT 450 + HV alloy has been evaluated according
to ISO 10993-5 standard, using the L-929 (mouse
fibroblasts) cell line. |
| Results
have confirmed the perfect cytocompatibility of
this alloy. Cells behaviour and function were definitely
similar to those measured in tests involving pure
gold, that is the paradigmatic non-toxic material. |
| International
standards: |
| ISO 9693:1999;
ISO 10271:2001; ISO 10993-5:1999 |
| Specific
properties |
| :: |
Manufactured
by HV technology |
| :: |
Finer and more homogeneous
crystal lattice |
| :: |
The high Modulus of Elasticity
makes the alloy recommended for implantology
and telescopic crowns |
| :: |
Excellent stability at high
temperatures even at minimal thickness on
the margins |
| :: |
Excellent compatibility of
the Thermal Expansion Coefficient (TEC) with
the most important dental ceramics on the
market |
|
| |
