Hot-rolled quality structural carbon steel for cold extrusion and upsetting in coils Hot-rolled quality structural carbon steel for cold extrusion and upsetting in coils
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Range:
Ø 13,5 mm
Steel grade:
20
Standard:
GOST 10702-2016

Steel grade Hardness, no less Tensile strength δB N/mm2 (kgf/mm2) Contraction ψ, %
after normal annealing after spheroidizing annealing
  Hot-rolled steel with special surface finish Steel calibrated and calibrated with special surface finish
10 115 143 330-450 (34-46) 310-410 (32-42) 55
15kp, 15ps 125 149 360-470 (37-48) 320-420 (33-43) 55
15 125 149 360-470 (37-48) 320-420 (33-43) 55
20kp, 20 ps, 20

132

163 390-490 (40-50) 340-440 (35-45) 50
25 156 170 no less 540 (55) no less 490 (50) 50
30 156 179 no less 570 (58) no less 520 (53) 45
35 163 187 no less 590 (60) no less 540 (55) 45
40 163 197 no less 590 (60) + 40
45 170 207 no less 590 (60) + 40

The "+" means that the mechanical properties and hardness defined for storing data, and test results indicate that in the quality.

In coils with single banding by steel strap 0,8-1,0х32 mm or by wire rod 8.0 mm in 4 places min. equally distributed over coil. Outer diameter of a coil –1300 mm max., inner diameter – 820 mm min.

Option 1 – coil weight 1400-1800 kg.
Option 2 – coil weight 1800-2500 kg.

In the rolling mill line there is a system of technical control "HiTEST" for linear determination of surface defects on the rolling material without physical contact with the material. The "HiTEST" system is specially designed to detect surface defects of the rolling material: cracks, bubbles, voids, scale residues and exfoliation.

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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