In a good rimming steel_________________________?
Correct answer: C. Carbon and silicon should be low
- A. Both silicon & carbon should be high
- B. Silicon should be low but carbon should be high
- C. Carbon and silicon should be low
- D. Silicon should be high but carbon should be low
Explanation
Rimming steel requires low carbon and silicon so that carbon monoxide evolution produces the characteristic rim during solidification. High silicon would deoxidize the steel and suppress this rimming action.
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