Mild steel rebar is commonly used as reinforcement in concrete structures to strengthen and support the concrete under stress. Shree Ji Steel Corp produces various sizes of mild steel rebar from 5.5mm to 32mm in diameter. The rebar is made from mild steel that has specific mechanical and chemical properties to improve the safety, durability, and strength of structures. The document provides tables listing the weight, mechanical properties like proof stress and tensile strength, and chemical composition of the company's mild steel rebar.