*3.3.2 Tensile properties*

**Table 3** summarizes the values of yield strength (YS), ultimate tensile strength (UTS), UTS/YS ratio and ductility in terms of elongation percentage (% EL) of different rebars. From **Table 3**, it is evident that the highest combination of strength and ductility has been achieved for stainless steel, followed by Fe 600 rebar among all the experimental rebars. It is a well-established fact that a higher CEV leads to higher UTS variations (**Table 2** *vis à vis* **Table 3**) [23]. **Table 4** shows the estimated ring diameter and area of tempered martensite in TMT rebars. It is noteworthy to mention that a greater amount of tempered martensitic ring area leads to higher strength (**Table 3** *vis à vis* **Table 4**) in the case of Fe 600 rebar. The estimated ring area of tempered martensite (≈39.56%) in Fe 600 rebar results in higher strength and lower ductility compared with the galvanized rebars with ≈20.10% ring area. It has been also noticed from **Table 4** that the area percentage of tempered martensite ring increases with the increasing diameter of the tempered martensitic rim. Plain rebar shows the maximum ductility due to the lower carbon content, whereas stainless steel with the lowest carbon and higher Cr contents having a completely ferritic microstructure and ferrite being a soft phase exhibits somewhat lower ductility than plain rebar. From earlier research, it has been observed that in seismic zones according to the ASTM A706:2006, UTS/YS ratio should be kept ≈1.25 [23, 33]. Previous studies have confirmed that rebars with UTS/YS ratio ≈1.19–1.24 provide greater advantages to their fatigue life [23, 47]. Therefore, it is clear from **Table 3** that stainless steel rebar with UTS/YS value ≈1.20 can become a potential candidate for the seismic hazard zone, whereas the other experimental rebars with lower values of UTS/YS ratio are expected to show better load resistance capacity in the seismic zone [23, 48].


### **Table 3.**

*Tensile properties of various experimental rebar specimens.*


### **Table 4.**

*Estimated ring diameter and area of tempered martensite in TMT rebars.*

*Study on the Perspective of Mechanical Properties and Corrosion Behaviour of Stainless… DOI: http://dx.doi.org/10.5772/intechopen.101388*
