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Nicrallium N7 is a nickel- and beryllium-free, type 5 cobalt-based non-precious dental alloy for metal-ceramic restorations. The presence of molybdenum allows the alloy to be stable at high temperatures, facilitating the bonding with the ceramic. It can also be used for the manufacture of dental and orthopaedic implants.

NICRALLIUM is a registered trademark of BCS.

Chemical composition

Co
  • 66.5%
Cr
  • 26-28%
Mo
  • 4.5-6.5%
Si
  • ≤ 0.7%
Mn
  • ≤ 0.6%
C
  • ≤ 0.05%
Fe
  • ≤ 0.5%
N
  • ≤ 0.2%
Others
  • 0.50

Mechanical properties

APPEARANCE
Solid
COLOR
Metallic gray
YIELD STRENGTH IN TENSION 0.2%
745 MPa
ELONGATION AT BREAK
16%
MODULUS OF ELASTICITY
210 GPa
DENSITY
8.35 g/cm3
HARDNESS
290 HV
THERMAL EXPANSION COEFFICIENT FROM 20 TO 500°C
14.8 x10-6 K-1
CORROSION RESISTANCE
< 200 μg·cm−2
The above values are provided for indication purposes.