The magnetic properties of steel are greatly affected if the percentage content of manganese exceeds about ___________
A. 0.1
B. 0.2
C. 0.25
D. 0.3
Answer:D
The magnetic properties of steel are greatly affected if the percentage content of manganese exceeds about ___________
A. 0.1 B. 0.2 C. 0.25 D. 0.3