Carbon wire of State Standard GOST 7348-81 for enforcement of pretension concrete structures
Carbon steel wire of State Standard GOST 7348-81 is designed for enforcement of pretension concrete structures. Iron wire of GOST 7348-81 is made 3,0 mm, 4,0 mm, 5,0 mm and 6,0 mm in diameter, wire can be produced of circular or die-rolled section. GOST 7348-81 carbon wire is manufactured tempered and tempered under voltage – regulated. Regulated wire of GOST 7348-81 is only of circular section.
Supply of carbon wire of GOST 7348-81
Carbon steel wire of State Standard GOST 7348-81 used for enforcement of pretension concrete structures is supplied in coils weighing 100 kg and more. Regulated carbon wire of GOST 7348-81 is shipped in coils up to 1000 kg, for wire 3,0 mm in diameter the inner diameter of reel coil is 1,2 m, and for wire diameters from 4,0 mm to 6,0 mm the inner diameter of reel coil makes 2 m, at the same time straightness of loose wire’s end is ensured within permissible rates. Wire for enforcement of concrete structures is delivered unpackaged and unoiled, is transported in open-box cars and should be stored in dry covered stirage accommodation.
| Diameter, mm | Strength class, N/mm2 | Nominal tensile strength, N/mm2 | Breaking strength, N (kfg) | Strength P0,2, N (kfg) | Stretch ratio, % | Q-ty of 180° kinks with rollers diameter 30 mm | |
|---|---|---|---|---|---|---|---|
| Circular section | Die-rolled section | ||||||
| Not less | |||||||
| 3,0 | 1500 | 1780 | 12600 (1285) | 10600 (1080) | 4 | 9 | 8 |
| 4,0 | 1400 | 1700 | 21400 (2180) | 18000 (1830) | 4 | 7 | 6 |
| 5,0 | 1400 | 1670 | 32800 (3340) | 27500 (2800) | 4 | 5 | 3 |
| 6,0 | 1400 | 1670 | 47300 (4820) | 39700 (4050) | 5 | – | – |