Nickel chromium bonding alloy for use with classic porcelains, in particular HeraCeram, and composites (Signum) acc. to EN ISO 9693 and 22674
Heraenium NA is a reliable nickelchromium based non precious metalalloy, primarily indicated for fabricating frameworks for metal-ceramics and specifically for use with classic porcelains such as HeraCeram. The framework can also be veneered with composites
Heraenium NA is free of beryllium and cadmium, exhibits good trimmed due to its minimal hardness.Especially when veneered with HeraCeram porcelain, aesthetic, high grade and dependable prosthetic restorations can be fabricated.
Kulzer Heravest Onyx and Moldavest exact investments are recommended for casting this alloy as they produce precisely fitting, smooth, fissure free castings.
Composition (Content in mass %):
Ni 59.3 | Cr 24.0
Mo 10.0 | Fe 1.5
Mn 1.5 | Ta 1.5
Si 1.2 | Nb 1.0
|Melting range (°C):||
Solidus, 11220°C (2228°F)
|Casting temperature (°C):||1450|
|Hardness (HV 10):||
After firing, 200
|0.2 % Yield strength (MPa):||After ceramic firing, 370|
|Tensile strength (MPa):||After ceramic firing, 710|
|Elongation (%):||After ceramic firing, 30|
|CTE (25 – 500 °C) (μm/m•K):||14.1|
|Young’s modul (GPa):||222|
Explanation of abbreviations and numbering:
x = content < 0.1 mass%
1 Inlays, cervical filling
2 MOD Inlays
5 Milling technique
6 Partial dentures
10 Cast posts
14 Can be veneered with high expansion, low-fusing ceramics
15 Implant restorations
16 Electroformed double crown technique (primary crowns)
w = after soft annealing and quenching
k = ceramic bonding alloy: condition after ceramic firing
v = after hardening
s = self-hardening after slow cooling in the mould
A = A stable framework design with reinforced connections with a cross section of 8 - 10 mm² is required for long span bridges and superstructures. Additionally, the frameworks need to be hardened.
B = Depending on the copper content, in some cases discolouration ofdouble crowns may result after short period of wearing. Discolouration, however, is technically and physiologically harmless.
C = In exceptional cases these alloys can also be used for traditional telescopic crowns with parallel walls and for the bar casting technique provided that cross-sections for crown walls, approximal areas, bars and laser welded joints are particularly thick and the alloy is hardened subsequently. No indication for conical crowns and sheardistributors.
Please observe instructions for use included during delivery when processing of the alloy!