Reox
Girobond NB
Girobond NB is an innovative adhesive alloy for the crown and bridge technique. The special, carbon-free composition of this CoCrMo alloy with its doping fines offers optimal properties and guarantees excellent results. Also suitable as a universal clasp prosthesis alloy for cast models, large telescopic work and delicate superstructures. Easy to eliminate by any method. Elaborate manufacturing using the precision casting process ensures quality advantages: protective cerium oxide coating, no discoloration, corrosion protection, improved metal-ceramic bond. Relatively soft alloy, easy to mill. Dense surface that can be easily polished to a mirror shine: Niobium acts as a fine-grain former when the melt solidifies. Carbon free and therefore without risk of cracking, easily laser welded. Problem-free and safe aesthetic veneering with all metal-ceramics; CTE of 14.6. Thanks to melt mirroring, no overheating of the melt.
Technical data
| Yield strength Rp 0.2% [MPa] | 620 |
| Tensile strength Rm [MPa] | 850 |
| Modulus of elasticity E [GPa] | 210 |
| Elongation at break A [%] | 10 |
| Vickers HV10 hardness | 320 |
| Casting temperature [C°] | circa 1510 |
| Solidus melting range [C°] | 1370 |
| Liquidus melting range [C°] | 1400 |
| Specific weight [g/cm³] | 8.5 |
| CET 25-500 C° [x 10-6 K-1] | 14.6 |
| CET 25-600 C° [x 10-6 K-1] | - |
| Composition by mass % | Co 62 |
| Composition by mass % | Cr 25 |
| Composition by mass % | Mo 5 |
| Composition by mass % | W 5 |
| Composition by mass % | Yes 1.2 |
| Other < 1% | Ce, Nb, Fe, N |
