Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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Delivery Condition +C Precision Seamless Stee Standard EN10305-1 Steel Round Pipe
Main Date
| Standard | EN10305-1; DIN2391; DIN2445 |
| Material | E235, E355, St37.4, St52.4 |
| Outer Diameter Range: | 4-120mm |
| Wall Thickness Range: | 0.5-15mm |
| Standard |
GB/T3639 GB/T8713 DIN2391-2 EN 10305-1 HK15-2000 |
| Delivery Condition | +C No heat treatment after the final cold drawig process. |
Other Aviliable Delivery Condition
NBK(+N): After the final cold drawing operation the tubes are normalized in a controlled atmosphere.
GBK(+A): After the final cold drawing process the tubes are annealed in a controlled atmosphere.
BKW(+LC): After the final heat treatment there is a suitable drawing pass.
BKS(+SR): After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere.
Commonly Used Size
| Φ4×0.5 | Φ16×0.5 | Φ26×1.8 | Φ35×9.0 |
| Φ4×0.8 | Φ16×0.8 | Φ26×2.0 | Φ35×10 |
| Φ4×1.0 | Φ16×1.0 | Φ26×2.2 | Φ38×0.5 |
| Φ4×1.2 | Φ16×1.2 | Φ26×2.5 | Φ38×0.8 |
| Φ5×0.5 | Φ16×1.5 | Φ26×2.8 | Φ38×1.0 |
| Φ5×0.8 | Φ16×1.8 | Φ26×3.0 | Φ38×1.2 |
| Φ48×5.0 | Φ70×2.8 | Φ90×10 | Φ130×14 |
| Φ48×5.5 | Φ70×3.0 | Φ90×12 | Φ130×16 |
| Φ48×6.0 | Φ70×3.5 | Φ90×14 | Φ130×18 |
| Φ48×7.0 | Φ70×4.0 | Φ90×16 | Φ140×2.5 |
| Φ48×8.0 | Φ70×4.5 | Φ95×2.0 | Φ140×2.8 |
| Φ48×9.0 | Φ70×5.0 | Φ95×2.2 | Φ140×3.0 |
Size Tolerance Table
| OD Range | EN10305(DIN2391) |
| 4-30mm | ±0.08mm |
| 31-40mm | ±0.15mm |
| 41-50mm | ±0.2mm |
| 51-60mm | ±0.25mm |
| 61-70mm | ±0.3mm |
| 71-160mm | ±0.30mm |
| WT Range | ±0.10mm |