Using of rebar in the construction with growing demand for ready-mixed concrete, it was needed to shed lights on some mechanical and chemical properties. For this, tests including tensile strength, bending, and chemical analysis were conducted on random samples of two types of rebar, TS-4 and TS-40. In addition, chemical analyses were performed on water samples that collected from different of three ready-mixed concrete plants named (C, D, and E). Also, corrosion tests were carried out on that both types of rebar, for each type, 18 samples were selected and divided for two types of corrosion test. In the first test, the samples of rebar were immersed for six weeks in the that water samples, the average value of weight loss was recorded every two weeks, after that the samples were returned to the same medium. In the second test, the samples were immersed for six consecutive weeks, then removed, and the average value of weight loss was recorded. The results indicated that the TS-4 has a higher carbon content compared to ST-40, with a tensile-to-yield strength ratio around 1.82, also observed the Water samples for chemical analyses test values within international standards. Corrosion tests showed close weight loss values for both types. However, increased the corrosion ratio was observed in the low-carbon TS-40 type, when exposed to water of sample (E) this due to increased the Total Dissolved Solids (TDS) value, which lead to raise the electrical conductivity, lead to increased corrosion ratio. ................. Keywords:................. rebar, ready-mixed concrete, tensile strength test, chloride water test, Total Dissolved Solids (TDS), corrosion.