Austenitic manganese steel used for making jaws of crushing machines contains about ______________ percent manganese?
Correct answer: D. 12-14
- A. 1.5-2
- B. 3.5-4.5
- C. 7-9
- D. 12-14
Explanation
Austenitic manganese steel, or Hadfield steel, normally contains about 12-14% manganese and is used for crusher jaws because it work-hardens under impact and abrasion. The lower manganese ranges do not produce this characteristic structure.
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