Q. Maximum hardness that can be achieved in plain carbon steel is of the order of (Solved)
1. There is no such limit for hardness
2. 100 - 150 Rockwell 'C'
3. 66 - 67 Rockwell 'C'
4. 50 Rockwell 'C'
5. 80-85 Rockwell 'C'
- c. 66 - 67 Rockwell 'C'
1. There is no such limit for hardness
2. 100 - 150 Rockwell 'C'
3. 66 - 67 Rockwell 'C'
4. 50 Rockwell 'C'
5. 80-85 Rockwell 'C'