Which of the options given below are true about how the commonly used structural steels are made?
(a) Very low carbon steels, < 0.1%
(b) Low carbon steel 0.1 to 0.25%
(c) Medium carbon steel 0.25 to 0.6%
(d) High carbon steel 0.6 to 1.1%
1
(a) is true
2
(a) and (b) are true
3
(a), (b) and (c) are true
4
All are true