During soldering, the solidus temperature of the filler material should be_____________?
Correct answer: B. Lesser than the substrate material
- A. Greater than the substrate material
- B. Lesser than the substrate material
- C. Equal to the substrate material
- D. Temperature not relevant
Explanation
The filler metal must melt and flow before the substrate begins to melt, so its solidus temperature must be lower than the substrate's melting range. Otherwise the restoration or wire may be damaged during soldering.
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