Wirobond 280 BEGO Cobalt-Chrome Alloy for Metal-Ceramic Restorations
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Brand: BEGO
SKU: H04414
Co-Cr alloy
ISO 9693-1
1 kg pack
Wirobond 280 BEGO – premium cobalt-chrome alloy for metal-ceramic restorations
Wirobond 280 BEGO is a non-precious cobalt-chrome alloy designed for dental laboratories producing crowns, bridges and frameworks for metal-ceramic restorations.
Compliant with ISO 22674 and ISO 9693-1, it features a Vickers hardness of 280 HV10, excellent casting properties, corrosion resistance and reliable bonding with compatible veneering ceramics.
Metal-ceramic
For crowns, bridges and Co-Cr frameworks
Easy finishing
Optimised hardness for finishing and polishing
Excellent castability
Suitable for thin sections and long-span restorations
Ni / Be free
Nickel- and beryllium-free alloy in accordance with ISO 22674
A Co-Cr alloy for crowns, bridges and metal-ceramic restorations
Wirobond 280 is intended for dental laboratories looking for a non-precious alloy for the fabrication of metal frameworks designed for ceramic or composite veneering.
Its formulation based on cobalt, chromium, tungsten, molybdenum and gallium provides a strong, stable structure suitable for the mechanical requirements of fixed restorations.
For dental technicians, its main advantage lies in the balance between mechanical strength, ease of finishing, reliable ceramic bonding and reproducible casting results.
Main applications
Wirobond 280 BEGO is indicated for fixed prosthodontic restorations requiring a reliable cobalt-chrome framework.
- Single metal-ceramic crowns.
- Short- and long-span metal-ceramic bridges.
- Co-Cr frameworks for ceramic veneering.
- Frameworks intended for composite veneering.
- Cast restorations requiring good mechanical strength.
Benefits for the dental laboratory
The relatively low hardness of the alloy makes grinding, adjustment and polishing easier than with harder cobalt-chrome alloys.
- Vickers hardness of 280 HV10 after casting.
- Excellent melting and casting properties.
- Reliable bonding with compatible veneering ceramics.
- Good corrosion resistance.
- Extended cooling is generally not required in most cases.
Reliable metal-ceramic bonding in accordance with ISO 9693-1
The success of a metal-ceramic restoration depends on compatibility between the alloy, the veneering ceramic, surface preparation and the firing protocol.
Wirobond 280 is designed for metal-ceramic restorations in accordance with ISO 9693-1. Its coefficient of thermal expansion of 14.3 × 10⁻⁶ K⁻¹ between 25 and 500 °C allows it to be used with compatible veneering ceramics in accordance with the ceramic manufacturer's instructions.
Before applying the ceramic, the framework surface must be carefully prepared, airborne-particle abraded, cleaned and protected from contamination to ensure reliable metal-ceramic bonding.
Controlled preheating and melting
BEGO documentation specifies a preheating temperature of 900 to 1000 °C for Wirobond 280, with solidus/liquidus temperatures of 1355 / 1430 °C.
The recommended casting temperature is approximately 1500 °C. The dental laboratory should adjust the parameters according to the melting equipment used, the investment material and the volume of the framework to be cast.
The use of a phosphate-bonded investment and a clean ceramic crucible reserved exclusively for this alloy is recommended.
Framework design
The wax-up design directly influences framework strength, casting quality and dimensional stability after ceramic firing.
- Minimum thickness after finishing: 0.3 mm.
- Avoid sharp angles and knife-edge margins.
- Design an anatomically reduced framework.
- Provide connectors with sufficient height and width.
- Reinforce the framework design in cases of bruxism.
Easier finishing thanks to 280 HV10 hardness
The 280 HV10 hardness after casting facilitates grinding, adjustment and polishing procedures in the dental laboratory.
This characteristic is particularly useful for dental technicians who regularly fabricate Co-Cr frameworks, as it helps reduce finishing time while maintaining mechanical strength suitable for fixed restorations.
After ceramic firing cycles, the hardness may reach approximately 315 HV10, according to the values specified by BEGO.
Corrosion resistance and biocompatibility
Wirobond 280 is formulated without nickel, cadmium, beryllium or lead in accordance with ISO 22674.
The combination of chromium, tungsten and molybdenum contributes to corrosion resistance and the formation of a stable surface.
The manufacturer also provides biological documentation that can be incorporated into the dental laboratory's quality management and traceability records.
Technical specifications of Wirobond 280 BEGO
| Product | Wirobond 280 BEGO |
|---|---|
| Type | Non-precious cobalt-chrome alloy for crowns, bridges and metal-ceramic restorations |
| Standards | ISO 22674 and ISO 9693-1 |
| Composition by mass | Co 60.2 · Cr 25.0 · W 6.2 · Mo 4.8 · Ga 2.9 · Mn · Si |
| Density | 8.6 g/cm³ |
| Preheating temperature | 900–1000 °C |
| Solidus / liquidus temperature | 1355 / 1430 °C |
| Casting temperature | Approx. 1500 °C |
| Modulus of elasticity | 215 GPa after casting / 235 GPa after ceramic firing cycles |
| 0.2% proof stress Rp0.2 | 515 MPa after casting / 520 MPa after ceramic firing cycles |
| Ultimate tensile strength Rm | 680 MPa after casting / 675 MPa after ceramic firing cycles |
| Elongation at break | 14% after casting / 9% after ceramic firing cycles |
| Vickers hardness | 280 HV10 after casting / 315 HV10 after ceramic firing cycles |
| CTE 25–500 °C | 14.3 × 10⁻⁶ K⁻¹ |
| Minimum thickness after finishing | 0.3 mm |
| Packaging | 1 kg / 1000 g |
| Massilia Dental SKU | H04414 |
| Manufacturer reference | 50134 |
Best practices for casting and ceramic veneering
The final quality of a metal-ceramic framework depends on careful control of every processing step: framework design, investing, melting, casting, cooling, finishing, airborne-particle abrasion, cleaning and ceramic application.
Before casting
- Use only a compatible phosphate-bonded investment.
- Design an appropriate sprue system for thin frameworks and bridges.
- Avoid excessively tapered sprues.
- Use a clean ceramic crucible reserved exclusively for the alloy.
- Do not overheat the alloy during melting.
Before ceramic veneering
- Finish the framework using tungsten carbide burs.
- Ensure that the surface is clean and free from contamination.
- Airborne-particle abrade the oxide layer according to the recommended parameters.
- Clean thoroughly using steam or boiling distilled water.
- Do not touch the prepared surfaces with bare fingers.
Wirobond 280 for dental laboratories looking for easier finishing
Within the range of cobalt-chrome alloys used for fixed prosthodontics, metal hardness has a significant influence on grinding comfort, finishing time and polishing quality.
Wirobond 280 is positioned as a premium Co-Cr alloy with a hardness that makes it easier to process, while retaining mechanical strength suitable for crowns, bridges and long-span restorations.
| Criteria | Conventional high-hardness Co-Cr alloy | Wirobond 280 BEGO |
|---|---|---|
| Finishing | Longer and more abrasive finishing procedure | Easier processing thanks to 280 HV10 hardness |
| Ceramic veneering | Depends on alloy composition and processing protocol | Designed for metal-ceramic restorations according to ISO 9693-1 |
| Long-span restorations | Depends on mechanical strength | High mechanical strength suitable for extended-span bridges |
| Corrosion | Highly dependent on the alloy composition | Good corrosion resistance due to the Co-Cr-W-Mo system |
| Laboratory handling | Grinding can be more demanding | Easier finishing and polishing |
Recommended related products
Delivery and packaging
Supplied as: 1 pack of Wirobond 280 BEGO, non-precious cobalt-chrome alloy for metal-ceramic restorations, in a 1 kg / 1000 g box, SKU H04414.
Documents and resources
Refer to the BEGO instructions for information on alloy characteristics, indications, investing, casting, ceramic preparation and finishing precautions.
Access BEGO product data, official resources and the biological certificate for inclusion in the dental laboratory's quality management and traceability records.
FAQ – Wirobond 280 BEGO
Is Wirobond 280 designed for metal-ceramic restorations?
Yes. Wirobond 280 BEGO is a cobalt-chrome alloy designed for metal-ceramic restorations and complies with ISO 9693-1.
It is suitable for the fabrication of crowns, bridges and metal frameworks intended for veneering with a compatible dental ceramic. The dental laboratory must follow the ceramic manufacturer's recommendations, particularly regarding surface preparation, airborne-particle abrasion, cleaning and firing cycles.
Why is Wirobond 280 easier to work with?
Its hardness of 280 HV10 after casting facilitates finishing procedures compared with harder cobalt-chrome alloys.
Grinding, adjustment and polishing can be performed more easily while maintaining mechanical strength suitable for fixed restorations. This combination improves laboratory handling, particularly when finishing larger frameworks or long-span bridges.
Which temperatures should be used for casting?
BEGO documentation specifies a preheating temperature of 900 to 1000 °C, a solidus/liquidus range of 1355 / 1430 °C and a casting temperature of approximately 1500 °C.
These values should be used with a compatible phosphate-bonded investment, a clean ceramic crucible and a casting system suitable for cobalt-chrome alloys. It is important not to overheat the alloy.
Is the alloy nickel- and beryllium-free?
Yes. According to the BEGO Instructions for Use, Wirobond 280 is free from nickel, cadmium, beryllium and lead in accordance with ISO 22674.
This formulation is valued by dental laboratories looking for a clearly identified non-precious alloy for dental restorations. However, in cases of known allergy to any metallic component, its use should be carefully evaluated.
Is extended cooling required after ceramic firing?
BEGO states that extended cooling is generally not required, including for long-span restorations, due to the alloy's optimised coefficient of thermal expansion.
The firing protocol specified for the ceramic being used must nevertheless be followed. Certain ceramics may require specific cooling procedures. The veneering ceramic must always be compatible with the CTE of Wirobond 280.
Which precautions should be taken during grinding and airborne-particle abrasion?
Metal dust generated during grinding, airborne-particle abrasion and polishing may be harmful. BEGO recommends the use of effective extraction, appropriate ventilation and a suitable protective mask.
The dental laboratory must also prevent surface contamination before ceramic application. After airborne-particle abrasion and cleaning, the frameworks should be handled using clean tweezers or instruments without touching the prepared surfaces with bare fingers.
A premium Co-Cr alloy for reliable metal-ceramic restorations
Wirobond 280 BEGO is a non-precious cobalt-chrome alloy intended for dental laboratories producing frameworks for crowns, bridges and metal-ceramic restorations.
Its 280 HV10 hardness, good castability, corrosion resistance and compatibility with metal-ceramic techniques make it a high-performance solution for routine fixed prosthodontic work.
When used with a compatible investment material, a controlled casting protocol and rigorous surface preparation, Wirobond 280 enables dental laboratories to produce clean, stable frameworks that meet professional laboratory requirements.
Wirobond 280 BEGO Cobalt-Chrome Alloy for Metal-Ceramic Restorations