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Steel Electric-Resistance-Welded Straight-Seam Tubes
Circular Section
GOST 3262-75
GOST 10705-80
GOST 10704-91
Measured lengths up to 12 m
Oil coating for corrosion protection
Dimensions
Outside Diameter
20mm
25mm
28mm
42mm
48mm
50mm
60mm
63mm
76mm
89mm
95mm
100mm
102 mm
114 mm
127mm
Steel grades
Coating
st2
st3sp
st3ps
08ps
08kp
08U
10ps
st20
DX51
DX52
DX53
E420
If desired
Coating Ze(Zinc), Alusinc(AS)
Thicknesses
Pipe walls
1.2mm
1.5mm
1.7mm
2.0mm
2.2mm
2.5mm
3.0mm
3.5mm
4.0mm
Assortment
Mechanical properties
Марки стали | Предел прочности, мин MPa | Предел текучести (Min MPa) | Относительное удлинение, % |
|---|---|---|---|
20, 20ps, 20kp | 372 | 245 | 21 |
StZkp, St3sp, St3ps | 372 | 225 | 22 |
10, 10ps, 10kp, | 314 | 196 | 25 |
08, 08ps, 10kp | 314 | 196 | 25 |
08kp | 294 | 174 | 27 |
08U | 255 | 174 | 30 |
1) Other steel grades to EU or other standarts can be supplied upon request.
2) Steel grades in accordance with GOST 380-2005 and GOST 1050-2013.
Dimensional tolerances
Характеристика | Значение отклонений |
|---|---|
Outside diameter (D) 10 mm < D ≤ 30 mm 30 mm < D ≤ 51 mm 51 mm < D < 127 mm | ±0.20 mm ±0.30 mm ±0.5% |
Ovality | Ovality is no more than the maximum deviations according to the outer diameter. |
Thickness (T) 1.0 mm ≤ T < 1.6 mm 1.6 mm ≤ T < 2.1 mm 2.1 mm ≤ T < 5.0 mm | ±9 % ±8 % ±4 % |
Straightforwardness | Maximum 0.15% of the measured length |
Length (m)4 m ≤ m ≤ 6 m 6 m ≤ m < 12 m | ±0,10% ±0,15% |
1) For a maximum distance of 100 mm, the ends may have diameters outside the tolerance limits due to residual stresses.
2) Tolerances meet and exceed the requirements of GOST 10704-91, GOST 10705-80.
Coatings and Surfaces
Обозначение Покрытия | Описание | Подходит для |
|---|---|---|
HR (hot rolled) | Hot rolled products | Painting, welding works |
CR (cold rolled) | Cold rolled products | Precision products, stamping, chrome plating |
+Ze(zinc coating) | Galvanized rolled products for corrosion resistance | Increased resistance to rust |
+As (aluminum and silicon coating) | Rolled products with Al-Si coating | High temperature conditions |
1) The surface is lightly oiled to protect against corrosion during transport and short-term storage. Upon request, pipes can be delivered dry; however, in this case, INVEST ZONE will not be responsible for any possible rust.
Шероховатость поверхности, Ra | Значение Ra |
|---|---|
HR, cold rolled | < 0.6 μm |
HR, hot-rolled | < 2.0 μm |
Packaging and labeling
Наружный диаметр (D) | Шт в Упаковке |
|---|---|
20 < D ≤ 26.8 | 217 |
26.8 < D ≤ 38 | 169 |
38 < D ≤ 50 | 91 |
50 < D ≤ 65 | 61 |
65 < D ≤ 78 | 37 |
78 < D ≤ 98 | 24 |
98 < D ≤ 127 | 19 |
1) All round pipes from INVEST ZONE are packed in a hexagonal shape and secured with steel strapping bands.
2) Each pack is clearly marked with the production date, pipe type, steel grade and exact dimensions, ensuring fast loading and traceability.
3) Upon request, pipes can be supplied in other packaging sizes.
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Information for the client
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