Hot-rolled quality structural steel bars for cold heading and extrusion
| Steel grade |
Механические свойства, не менее |
|||
| Yield strength , N/mm |
Tensile strength , N/mm |
Relative elongation , % |
Contraction , % |
|
| 08 |
196 |
320 |
33 |
60 |
| 10 |
205 |
330 |
31 |
55 |
| 15 |
225 |
370 |
27 |
55 |
| 20 |
245 |
410 |
25 |
55 |
| 25 |
275 |
450 |
23 |
50 |
| 30 |
295 |
490 |
21 |
50 |
| 35 |
315 |
530 |
20 |
45 |
| 40 |
335 |
570 |
19 |
45 |
| 45 |
355 |
600 |
16 |
40 |
Note - As agreed between the manufacturer and the customer for steel from steel grades 25, 30, 35, 40, allowed reduction of tensile strength of 20 N/mm, compared with the standards set out in the table, while improving the rules elongation of 2% (abs ).
In bundles, weight 5 tons max., with single banding by steel strap 0,8-1,0х32 mm in 6 places min. equally distributed over bundle. Each bundle is provided with 2 steel straps for multiple lifting.
Upon agreement: wrapped polyfilm, textile straps.
At rolling line the HI-GAUGE device is installed for measuring the size of round rolled products. The system "HI-GAUGE" provides detection of nonconformity of parameters: size, tolerances, ovality.
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.