What are the main differences between rebar and round steel
The main differences between rebar and round steel are the following five points:
1. Different shapes. The outer surface of round steel is smooth; The outer surface of the rebar has a spiral rib;
2. Different production standards. In the current standard, round steel refers to HPB235 steel bar, its production standard is "hot rolled smooth steel bar for reinforced concrete" (GB13013); Rebar generally refers to HRB335 and HRB400 grade rebar, its production standard is "hot rolled ribbed steel bar for reinforced concrete" (GB1499);
3. Different levels of intensity. The design strength of round steel (HPB235) is 210MPa; The strength of rebar is higher than that of round steel, and the design strength of HRB335 is 300MPa; The design strength of HRB400 is 360MPa;
4. Different types of steel (chemical composition is different). Round steel (HPB235) is carbon steel, steel is Q235; Rebar is low alloy steel, HRB335 steel bar is 20MnSi(20 manganese silicon); HRB400 grade rebar is 20MnSiV or 20MnSiNb or 20MnTi, etc.
5. Different physical and mechanical properties. Due to the different chemical composition and strength of steel bars, there are differences in physical and mechanical properties. The cold bending performance of round steel is better, can be 180 degrees of bending hook, rebar can only be 90 degrees of straight hook; The weldability of round steel is better, and ordinary carbon electrode can be used, and low alloy electrode should be used for rebar.
Round steel has broad application prospects, and is widely used in hardware, construction, automobile, shipbuilding, petrochemical, machinery, medicine, food, power, energy, aerospace, etc., building decoration. The most extensive processing of ordinary mechanical parts, general rod steel parts, CD rods, bolts, nuts. Round steel is usually used for reinforcement in reinforced concrete structures, while rebar is usually used for connection and reinforcement in steel structures.
