Wire rod

Wire rod


Hot rolled steels for quenched and tempered springs Hot rolled steels for quenched and tempered springs
ORDER
Range:
Ø 5,5 - 20,0 mm
Steel grade:
38Si7
Standard:
EN10089-2002

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 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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