Reinforcement bars in accordance with standard IS No. 432 part-I can be classified into following types.
1) Mild Steel Bars: Mild steel bars can be supplied in two grades
a)Mild steel bars grade-I designated as Fe 410-S or Grade 60 b) Mild steel bars grade-II designated as Fe-410-o or Grade 40
2) Medium Tensile Steel Bars designated as Fe- 540-w-ht or Grade 75
2) Medium Tensile Steel Bars designated as Fe- 540-w-ht or Grade 75you mentioned