Reinforcing bars

Reinforcing bars


reinforcing die-rolled section bars A400 class reinforcing die-rolled section bars A400 class
ORDER
Range:
Ø 10-40 mm
Steel grade:
25G2S
Standard:
GOST 5781-82
Material Safety Data Sheets:
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Class Yield strength

Tensile strength

Relative elongation , % Uniform elongation, % Toughness at minus 60°С Bending test in cold condition (- thickness mandrel, - the diameter of the rod)
N/mm kgf / mm Н/мм kgf / mm МДж/м кгс·м/cм
no less
A-I (А240) 235 24 373 38 25 - - - 180°;
A-II (А300) 295 30 490 50 19 - - - 180°;
Ac-II (Ac300) 295 30 441 45 25 - - - 180°;
A-III (A400) 390 40 590 60 14 - 0.5 5 90°;
A-IV (A600) 590 60 883 90 6 2 - - 45°;
A-V (A800) 785 80 1030 105 7 2 - - 45°;
A-VI (A1000) 980 100 1230 125 6 2 - - 45°;

Remarks:

  1. As agreed between the manufacturer and the consumer is allowed not to carry out the test on the impact toughness of the steel reinforcing the class Ac-II (Ac300).
  2. (Excluded, Edit. Number 3).
  3. For rebar class A-IV (A600) 18 mm diameter steel rule bending 80°C cold set not less than 30 °C.
  4. Reinforcing steel grade A-I (A240) over 20 mm at a cold bending by 180 ° with = 2d, class A-II (A300) over 20 mm diameter = 4d.

In bundles, weight 5 tons max., with banding by wire rod 6,5 mm in 6 places min. equally distributed over bundle. Each bundle is provided with 2 steel straps for multiple lifting.

Quality control of cold-deformed reinforcing bars includes the monitoring of:

  • Geometric al parameters of the profile;
  • Relative collapse area;
  • Surface ratio of projection;
  • Linear density;
  • Yield point;
  • Tensile strength;
  • Ratio of tensile strength to yield point;
  • Percentage elongation at maximum load;
  • Bending test;
  • Surface quality.

The laboratories conducting physic, mechanical, chemical and metallographic tests work in order to control technological production processes and quality of finished steel products. The Central Works Laboratories are accredited for technical competence in accordance with the requirements of the national standard STB/ISO MEC 17025 and DIN EN ISO 17025:2005.

To monitor production processes and evaluate the quality of finished products, there are laboratories that conduct physical, mechanical, chemical and metallographic tests. The CPL laboratories are accredited for technical competence in the main activities in accordance with the requirements of the national standard STB / ISO IEC 17025 and the standard DIN EN ISO 17025:2005.

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