Chromium as an alloying element in alloy steel is used principally to

1.	Chromium as an alloying element in alloy steel is used principally to
A.	Improve hardenability
B.	Improve mechanical properties at low temperature
C.	Improve mechanical properties at elevated temperature
D.	Improve the corrosion and oxidation resistance
Answer» E.

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Chromium as an alloying element in alloy steel is used principally to

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