Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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Delivery Condition +LC Precision Seamless Steel Standard EN10305-1 Steel Round Pipe
Description
Precision seamless steel tube is a high precision steel tube after cold rolling or cold drawing.
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 |
Delivery Condition
| NBK(+N) | After the final cold drawing operation the tubes are normalized in a controlled atmosphere. |
| BKW(+LC) |
After the final heat treatment there is a suitable drawing pass. |
| GBK(+A) | After the final cold drawing process the tubes are annealed in a controlled atmosphere. |
| BK(+C | No heat treatment after the final cold drawig process. |
| BKS(+SR) |
After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere. |
Advantage
1. Smaller outer diameters;
2. High precision can be done in small batch production;
3. Cold drawing finished products with high precision and good surface quality.
4. The transverse area of the steel tube is more complicated;
5. Steel pipe performance is superior, metal is more dense.