Seamless Steel Pipe DIN1629 ST44,COLD DRAW LOW STEEL PIPE
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Seamless Steel Pipe DIN1629 ST44,COLD DRAW LOW STEEL PIPE
| DELIVERY CONDITION | |||||
| Steel grade | Delivery condition | ||||
| ST37.0 | Hot-finished | ||||
| ST44.0 | Hot-finished | ||||
| ST52.0 | Hot-finished | ||||
| CHEMICAL COMPOSITION( CAST ANALYSIS) IN% | |||||
| Steel grade | C | Si | p | S | |
| max | Mn | max | max | ||
| ST37.0 | 0.17 | -- | -- | 0.040 | 0.040 |
| ST44.0 | 0.21 | -- | -- | 0.040 | 0.040 |
| ST52.0 | 0.22 | -- | -- | 0.040 | 0.035 |
| MECHANICAL PROPERTIES | |||||
|
Steel grade |
Yield strength Min (Mpa) |
Tensile strength Min(Mpa) |
Elongation A Min(%) |
||
| T min mm | |||||
| ≤16 |
>16 ≤40 |
||||
| ST37.0 | 235 | 225 | 350-480 | 25 | |
| ST44.0 | 275 | 265 | 420-550 | 21 | |
| ST52.0 | 355 | 345 | 500-650 | 21 | |
| Note: T: thickness; L: longitudinal | |||||
The Tolerance of Length:
| The Type of Length |
The Tolerance mm |
| ≤6m | +100 |
| >6m ≤12m | +150mm |
| >12m | according to the negotiation |
The Toleracne of Diameter :
|
The Diameter mm |
The Tolerance |
| ≤100 | ±1% da ( ±0.5mm is alsiviable ) |
| 100<da≤200 | ±1% da |
| >200 | ±1% da |
The Tolerance of the Wall Thickness:
| The tolerance is according to the diameter | ||||||||
| da≤130mm | 130mm<da≤320mm | 320mm<da≤660mm | ||||||
| Wall Thickness S | ||||||||
| ≤2 | 2•Sn<S≤4•Sn | >4•Sn | ≤0.05da | 0.05da<S≤0.11da | >0.11da | ≤0.05da | 0.05da<S≤0.09da | >0.09da |
|
+15% -10% |
+12.5% -10% |
+17.5% -12.5% |
+17.5% -12.5% |
±12.5% | ±10% |
+20% -15% |
+15% -12.5% |
+12.5% -10% |
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