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DIN 1629 Seamless Steel Tubes
DIN 1629 seamless steel tubes DIN 1629 seamless circular unalloyed steel tubes subject to special requirements Steel grade: ST37.0, ST44.0, ST52.0 Delivery condition: Hot finished Size range: OD 70mm-610mm, WT 4mm-35mm Length: commerical length Dimension and tolerance: according to EN10216 Test:...
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DIN 1629 seamless steel tubes
DIN 1629 seamless circular unalloyed steel tubes subject to special requirements
Steel grade: ST37.0, ST44.0, ST52.0
Delivery condition: Hot finished
Size range: OD 70mm-610mm, WT 4mm-35mm
Length: commerical length
Dimension and tolerance: according to EN10216
Test: cast analysis, tensile test, impact test, electromagnetic test, visual inspection
Certification: PED(97/23/EC) and AD2000, Lioyd's register
Chemical composition
| Steel grade | Elements content, Max, % | ||||||
| C | Mn | Si | S | P | Ni | Al | |
| ST37.0 | 0.17 | -- | -- | 0.040 | 0.040 | 0.009 | -- |
| ST44.0 | 0.21 | -- | -- | 0.040 | 0.040 | 0.009 | -- |
| ST52.0 | 0.22 | 1.60 | 0.55 | 0.040 | 0.035 | -- | ≥0.02 |
Mechanical properties
| Steel grade | Min Yield strength, MPa for S(wall thickness), mm | Tensile strength Rm, MPa | Min Elongation A, % | |||
| S≤16 | S>16, S≤40 | S>40, S≤65 | Longitudinal direction | Transverse direction | ||
| ST37.0 | 235 | 225 | 215 | 350-480 | 25 | 23 |
| ST44.0 | 275 | 265 | 255 | 420-550 | 21 | 19 |
| ST52.0 | 355 | 345 | 335 | 400-650 | 21 | 19 |
Tolerances
| Outer diameter, mm | Outer diameter permissible deviation |
| Up to 100 | ±1% (but not less than ±0.5mm) |
| Above 100 up to 200 | ±1% |
| Above 200 | ±1% |
| Wall thickness permissible deviation | ||||||||
| For OD up to 130mm | For OD above 130mm and up to 320mm and wall thickness S | For OD above 320mm | ||||||
| S≤2*Sn | S>2*Sn, S≤4*Sn | S≤0.05OD | S>0.05OD, S≤0.11OD | S>0.11OD | S≤0.05OD | S>4*Sn | S>0.05OD, S≤0.09OD | S>0.09OD |
+15%, -10% | +12.5%, -10% | +17.5%, -12.5% | +15%, -10% | ±12.5% | +20%, -15% | ±9% | +15%, -12.5% | +12.5%, -10% |
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