Ordinary carbon structural steel is also called ordinary carbon steel. The carbon content is 0.06-0.22%, with less than 0.25% being the most commonly used. Belonging to low carbon steel, each metal grade represents the lowest yield point of the steel when the thickness is less than 16mm.

HPB300 grade: The yield strength of steel bars in this grade is 300MPa, with high plasticity and toughness, suitable for general structural reinforcement and stirrups. HRB335 grade: The yield strength of this grade of steel bars is 335MPa, with high strength and good ductility, suitable for general structural reinforcement and stirrups, especially for projects with high strength requirements.

Technological Process:
Deformed steel bar is the common name of hot-rolled ribbed steel bar. The grade of ordinary hot-rolled steel bar consists of the minimum yield point of HRB and grade. H, R and B are the first letters of Hotrolled,Ribbed and Bars.

HRB400 is a steel reinforcement material with high strength and good plasticity. HR stands for "hot rolling", which essentially refers to the heating and rolling process of steel bars in the production process. B represents that its yield strength is 400 megapascals (MPa) higher than that of ordinary carbon steel.

A615 grade 40 steel adds the most benefit when building materials must hold concrete in compression. Strength is one of the differentiators for these two rebar grades. The minimum tensile strength for A615 grade 40 steel is 70.05 ksi. It has a minimum yield strength of 40 ksi.

ASTM A615 is a deformed steel standard categorized under American standards. These are generally available in diameter between 9.5 mm and 43 mm, and length between 6 m and 12 m. Generally, the steel bars that fall under this standard are under deformed or plain carbon steel.

BS4449 is yet another deformed steel bar standard. It is also differentiated as per European standards. When it comes to manufacturing, the steel bars falling in this standard are also hot rolled, which means that they are also used for general purposes, i.e. in common construction projects.

HRB500 steel reinforcement refers to a commonly used steel material in concrete structures, which has certain strength and toughness, and can effectively enhance the bearing capacity and tensile performance of concrete. Steel reinforcement plays an important role in construction.

HRB500 steel bar is a new type of hot-rolled ribbed steel bar with high strength and good ductility. The use of HRB500 steel bar in engineering presents advantages such as saving steel bar usage and facilitating steel bar layout.

B500A grade steel is usually used for steel mesh products while B500B grade steel is used for steel bars. B500C steel is rarely required, and it is always worthwhile for structural engineers to check whether B500B grade steel can be used instead of B500C, because B500C usually has a significant cost overhead.