How many patterns are there in threaded steel?
There are two kinds of classification methods commonly used types of thread steel: one is to shape classification, according to different space shapes and transverse rib rib for classification or type, such as the British Standard (BS4449), the thread steel is divided into type I and type ii. This classification mainly reflects the tightening performance of the threaded steel. The two is the performance of classification (class), such as China's standard (G B1499), according to the strength (tensile strength yield point / steel) will be divided into 3 levels; the Japanese industrial standard (JI SG3112), according to the comprehensive performance of steel will be divided into 5 categories; the British Standard (BS4461) also, certain provisions of the grades of steel performance test thread. In addition, the thread steel can be classified according to the use, such as reinforced concrete, ordinary steel bars and reinforced concrete bars for heat treatment. Main uses: widely used in housing, bridges, roads and other civil engineering construction.
Rebar is ribbed steel, ribbed steel, including rebar. A ribbed steel bar with 2 longitudinal ribs and uniformly distributed ribs along the length. The transverse rib shape is helical, herringbone, crescent 3. Because of the function of rib, it has better bonding ability with concrete, so it can bear the effect of external force better.
According to the shape of steel ribs, there are three kinds of patterns: herringbone spiral and crescent shaped patternSteel is commonly known as hot rolled ribbed bar, belonging to the small steel steel, mainly used for steel reinforced concrete structure frame. In use, some mechanical strength, bending deformation property and welding performance are required. The raw steel billet for the production of threaded steel is carbon structural steel or low alloy structural steel which is treated by calm melting, and the finished steel bar is delivered in hot rolling forming, normalizing or hot rolling state.
