Hot rolled steel bar with good quality and best price The diameter of steel bar is 6mm~40mm

Rebar refers to steel used for reinforced concrete and prestressed reinforced concrete. Its cross section is round and sometimes square with rounded corners. Including light round steel bar, ribbed steel bar, torsion steel bar.

Reinforced concrete with steel bar refers to reinforced concrete reinforcement with straight bar or disc strip steel, its shape is divided into light round steel bar and deformation of steel bar two, delivery state for straight bar and disc round two.

Light round steel bar is actually the small round steel and disk of ordinary low carbon steel. Deformed steel bars are surface ribbed bars, usually with two longitudinal ribs and transverse ribs evenly distributed along the length direction. The appearance of transverse rib is helical, herringbone, crescent form 3 kinds. In millimeters of nominal diameter. The nominal diameter of deformed steel bar is equivalent to that of circular steel bar with equal cross section. The nominal diameter of steel bar is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32, 40 mm. Steel :20MnSi, 20MnV, 25MnSi, BS20MnSi. Reinforcement mainly undergoes tensile stress in concrete. Because of the action of rib, deformed steel bar and concrete have greater bonding ability, so it can bear the action of external force better. Steel bars are widely used in various building structures. Especially large, heavy, light thin-walled and high-rise building structures.

Delivery status is straight or round.

                       specifications:6mm,8mm,9mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,25mm,28mm,32mm,40mm.

classification

1, Divided by diameter

Steel wire (diameter 3 ~ 5mm), fine reinforcement (diameter 6 ~ 10mm), thick reinforcement (diameter greater than 22mm).

2, According to mechanical properties

Grade I reinforcement (grade 300 / 420); Grade II reinforcement (grade 335 / 455); Grade III reinforcement (400 / 540) and grade IV reinforcement (500 / 630)

3, By production process

Hot rolled, cold rolled and cold drawn steel bars, as well as heat-treated steel bars made of grade IV steel bars, have higher strength than the former.

4, According to the function in the structure

Compression reinforcement, tension reinforcement, erection reinforcement, distribution reinforcement, stirrup, etc.

Inspection of reinforcement and process inspection of reinforcement joint:

The inspection of reinforcement shall first check the label number and quality certificate of reinforcement; Secondly, the appearance inspection shall be carried out, and 5% of each batch of reinforcement shall be selected. The surface shall be free of cracks, wounds and laminations. The bump on the surface of the reinforcement shall not exceed the height of the transverse rib, the depth and height of the defect shall not be greater than the allowable and deviation of the position, and the bending degree of the reinforcement per meter shall not be greater than 4mm; Next, for the mechanical property test, if each batch is less than 60 tons, two pieces will be taken from each batch, and two sections will be cut off for tensile and cold bending tests respectively. When cutting the test piece, remove 100-500mm at both ends of the reinforcement, and take the corresponding reinforcement when the test piece is more than 60t. If a test result fails to meet the requirements, double the number of samples from the same batch shall be taken for each test. If one sample is still unqualified, the batch of reinforcement is unqualified. In case of brittle fracture, poor welding performance or significant abnormal mechanical properties of hot-rolled reinforcement during processing, chemical composition analysis and other special inspections shall be carried out.