reinforcing die-rolled section bars A400 class
| 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:
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.
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.