Alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and:

Alloy steel which is work hardenable and which is used to make the bla

1.	Alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and:
A.	Chromium
B.	silicon
C.	Manganese
D.	magnesium.
Answer» D. magnesium.

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Alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and:

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