Бетон Железобетонный Бар

1. Name: Hot rolled ribbed steel bars for the reinforcement of concrete 2. Standard: GB1499-1998 3. Chemical Compositions: Grade Chemical Compositions: % C Si Mn P S Ceq HRB335 0.25 0.8 1.6 0.045 0.045 0.52 HRB400 0.25 0.8 1.6 0.045 0.045 0.54 HRB500 0.25 0.8 1.6 0.045 0.045 0.52 4. Mechanical properties: 1) mechanical properties of reinforced bar should com[ply with: Grade Nominal diameter σs σb δ5 mm MPa MPa % ≥ HRB335 6-25,28-50 335 490 16 HRB400 6-25,28-50 400 470 14 HRB500 6-25,28-50 500 630 12 2) The elongation rate (δ gt) should not be less than 2.5%. Test exempted on suppliers'quality guarantee. 3) On buyers' request, reinforced bar of the following characteristics will be available: a) Tensile strength and measured yield point≥1.25; b) The rate of measured yield point to σs listed in the table above≤1.30. 5. Technological properties 1) Bending property The surface should not crack at the bend part after bent 180-degree flexural based on the bend diameter listed in the table below: Grade Nominal diameter Bending test mm Bend diameter HRB335 6-25 3a 28-50 4a HRB400 6-25 4a 28-50 5a HRB500 6-25 6a 28-50 7a