8. Physical and chemical properties
Form: Solid.
Color: White.
Odor: None.
Melting point/range: 1320-1380º C.
Density: 8.4 g/cm3

9. Stability and reactivity
Conditions to be avoided: No restrictions.
Substances to be avoided: No restrictions.
Hazardous decomposition products: May release metallic vapors during melting.

10. Toxicological information
Possible evidence of cancerogenic effect in animal experiments.
Experience gathered in humans: When handling this product, hazardous effects have not been reported so far.
Further information: If proper handling and storage are ensured, no hazardous reactions are known.

11. Ecological information
General information: Dust and water-soluble forms of the alloy: avoid penetrating into soil, water and sewage system. Plates ingots wire: water hazard class: 0, not hazardous to water.

12. Disposal consideration
Product: To be disposed of according to the regulations of local authorities.

13. Transport information
Hazardous material within the meaning of transport regulations:
GGVS/GGVE/RID/ADR/IMDG-Code/ICAO-T


14. Regulatory information
Labeling according to EC guidelines: No labeling according to Gefahrstoffverordnung (Hazardous Substances Regulations 7, section 5 (guideline 67/548/EEC and appendixes) required.

15. Other information
Data sheet completed by: Research and Development Department – Bredent (Germany).

This Material Safety Data Sheet is provided by way of guide for the use of our product and is correct to the best of our knowledge.
However, we can’t offer any guarantee as to its accuracy or exhaustiveness. All chemicals may present unforeseen risks and should be used with caution.
We cannot guarantee that the risks referred above are the only risks present. The final choice of the application of a product is thus the sole responsibility of the user.

2. Processing
Dust and vapors: Do not inhale. May release metallic vapors when melted. Possible sensitization due to skin contact and inhalation.

2.1 Modeling, preheating and casting
Cast supply resp. crowns and bridges are modeled according to standard criteria. Use round wax profiles with diameters of 3 to 4 mm. for sprues. Diverting of the molten alloy must be avoided. Use phosphate-bonded investment materials for investing. Preheat casting rings up to 950 - 1000º C; particularly thin objects or full plates for upper jaws should be preheated to 1050º C. Depending on the size of the casting ring and the quantity of alloy that is fed into the casting ring, the final temperature must be maintained for 45 to 60 minutes. The casting temperature of Brealloy F 400 is 1480º C. The alloy can be melted with a high-frequency melting machine or with an open flame. Use a separate ceramic crucible to melt Brealloy F 400 in order to avoid contamination with other alloys. Preheat the crucible together with the casting rings in the furnace and clean them after each casting process. The cylindrical shape of the metal pieces simplifies melting down during induction melting of the alloy. Start casting when all cylindrical pieces have flown together and the molten metal appears to be evenly bright.
Note: During melting under vacuum fewer oxides are formed and the oxide skin tears up earlier in the vacuum.
During melting with an open flame, the correct adjustment of the burner (torch) must be ensured. Melting should only be carried out with the reducing zone of the circulating flame. Start casting when the molten material begins to move under the pressure of the gas. Overheating of the molten metal must be avoided. The operating instructions of the respective casting machines must be adhered to.

2.2 Devesting and finishing
Devest the casting after the casting ring has cooled down and sandblast with corundum at maximum pressure of 4 bar. Do not use automatic sandblasting units for attachments and fit elements. After sandblasting finish the surfaces using abrasive stones, sintered diamonds or Tungsten carbide burs. If electrolytic polishing is required, use cover varnish to protect clasps and fit elements against uncontrolled removal of material. A Tungsten carbide bur is used to remove cast beads from fit elements produced according to the single-piece casting technique. After finishing of the cast object, smoothen the surface with rubber polishers and polish using a polishing paste for CoCrMo alloys.

2.3 Joining techniques
Use Brealloy Solder (Item # 500 00soldering. Use commercial CoCr laser welding wire for laser welding; do not produce welding wires from Brealloy F 400 in the casting technique.

3. Technical Data

3.1 Composition (in mass %):
Cobalt 64.7
Chromium 29
Molybdenum 5
Manganese 0.4
Silicon 0.5
Carbon 0.4
 

3.2 Physical values (guide values):
Density (g/cm3) 8.4
Vickers hardness (HV10) 400
Solidus point (º C) 1320
Liquidus point (º C) 1380
Casting temperature (º C) 1480
0.2% Proof stress (MPa) 700
Modulus of elasticity (MPa) Approx. 220,000
Tensile strength (MPa) 900
Strain at break (%) 4
Expansion coefficient (TEC 25-600º C) 15 µm/mk

4. Other Information
The information contained in this product information is always updated according to the latest knowledge and experience. Therefore, we recommend to read this product information again before using a new package.
This product information refers to Brealloy F 400, Item #s 500 ML1 00, 500 ML5 00, and 500 ML0 00.