Size and dimension
| Size: | from 20×6 to 68×9 mm |
|---|---|
| Wall thickness: | from 1 to 3 mm |
Material
| Steel grades by DIN: | St 12, St34–2, RSt37–2, St37–2 |
|---|---|
| GOST: | VSt2kp, VSt3kp, VSt3sp |
Consideration will be given to customers' request for other steel grades.
Surface finish
Drawn section tubes are supplied with bright surface finish. The weld at the outer surface may be visible, the inner collar is removed. The surface defects and scratches which will not exceed a half of the wall thickness tolerance limit are permissible (measured from the true size).
Heat treatment
As required by the customer:
- without heat treatment (BK condition according to DIN standard)
- normalized (NBK condition according to DIN standard)
Lengths and tolerances
| Manufactured length: | from 2 to 7 m |
|---|---|
| Approximate length: | from 3.5 to 7 m with a tolerance limit of ±250 mm |
| Precise length: | from 3.5 to 7 m with a tolerance limit of + 50 mm |
Extra precise length: from 0.3 to 2 m with a tolerance limit of ±1 mm Permissible tolerances of outer dimensions and the wall thickness meet appropriate standards. Special shape sections (including straightness) according to agreement.
Packing and designation
The drawn steel section tubes are supplied in band-blocked bundles which weigh up to 3000 kg. Each bundle is fitted with the producer's label with the data as follows:
- size
- steel grade
- heat number
- order number
- final inspection
- customer
- weight in kg, following an agreement length in m and number of pieces
The surface of the sections is protected against atmospheric corrosion with preserving agent.
Profile
| A mm | B mm | R mm | r mm | t mm | Weight kg/m | Číslo profilu | A mm | B mm | R mm | r mm | t mm | Weight kg/m | Tube nou |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 6.0 | 3.0 | 1.0 | 0.343 | 3032810 | 40 | 10.0 | 5.0 | 1.5 | 1.020 | 3030215 | ||
| 20 | 10.0 | 5.0 | 1.5 | 0.550 | 3000315 | 40 | 14.0 | 7.0 | 2.0 | 1.410 | 3032320 | ||
| 20 | 11.5 | 5.75 | 1.5 | 0.570 | 3030315 | 40 | 20.0 | 10.0 | 1.5 | 1.155 | 3032215 | ||
| 23 | 13.0 | 6.5 | 1.2 | 0.538 | 3031412 | 40 | 20.0 | 10.0 | 2.0 | 1.515 | 3032220 | ||
| 23 | 13.0 | 6.5 | 1.5 | 0.661 | 3030415 | 50 | 10.2 | 5.1 | 1.0 | 0.853 | 3031010 | ||
| 25 | 15.0 | 7.5 | 1.7 | 0.736 | 3032415 | 50 | 20.0 | 10.0 | 1.5 | 1.393 | 3031715 | ||
| 25 | 15.0 | 7.5 | 2.0 | 0.956 | 3032420 | 50 | 20.0 | 10.0 | 2.0 | 1.832 | 3031720 | ||
| 26 | 12.0 | 6.0 | 1.0 | 0.492 | 3031310 | 50 | 25.0 | 12.5 | 2.0 | 1.910 | 3031920 | ||
| 30 | 15.0 | 7.5 | 1.5 | 0.852 | 3031515 | 50 | 30.0 | 15.0 | 1.5 | 1.525 | 3031215 | ||
| 30 | 15.0 | 7.5 | 2.0 | 1.114 | 3031520 | 50 | 30.0 | 15.0 | 2.0 | 2.010 | 3031220 | ||
| 30 | 16.0 | 8.0 | 1.2 | 0.702 | 3031112 | 55 | 25.0 | 12.5 | 1.5 | 1.575 | 3032715 | ||
| 30 | 16.0 | 8.0 | 1.5 | 0.867 | 3031115 | 55 | 25.0 | 12.5 | 2.0 | 2.076 | 3032720 | ||
| 30 | 16.0 | 8.0 | 2.0 | 1.130 | 3031120 | 60 | 30.0 | 15.0 | 2.0 | 2.322 | 3032620 | ||
| 35 | 15.0 | 7.5 | 2.0 | 1.270 | 3031620 | 60 | 40.0 | 20.0 | 2.5 | 3.096 | 3032525 | ||
| 38 | 20.0 | 10.0 | 1.5 | 1.180 | 3000515 | 68 | 9.0 | 4.5 | 1.0 | 1.125 | 3030910 | ||
| 38 | 20.0 | 10.0 | 2.0 | 1.450 | 3030520 |