18-B Stainless steel orthodontic wire has_______________?
Correct answer: D. 18% Chromium 8% Nickel
- A. 18% Nickel 8% Chrominum
- B. 18% Carbon 8% Iron
- C. 18% Chromium 8% Cobalt
- D. 18% Chromium 8% Nickel
Explanation
The familiar 18-8 stainless-steel designation means approximately 18% chromium and 8% nickel. Chromium provides corrosion resistance, while nickel helps stabilize the austenitic structure.
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