Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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High Precision Cold Drawn Welded Steel Tube For Precision Machinery Equipments
Description:
High precision cold drawn welded steel tubes are essential for precision machinery equipment, offering exceptional dimensional accuracy and strength. These tubes undergo a meticulous cold drawing process, enhancing their mechanical properties and surface finish. Their welds are expertly crafted to ensure durability and reliability under high stress. Ideal for applications requiring tight tolerances, they provide excellent performance in various industries. With resistance to corrosion and fatigue, these tubes are vital for enhancing the efficiency and longevity of precision machinery.
Typical Specification:
| Grade | Welding Typical Specification | Yield Strength | |
| 3 | E355 | Φ38×4.5 | 355～450Mpa |
Chemical Component:
| Steel Number | Quality Level | Thickness/mm | Deoxidize Method | C(%)≤ | Si(%)≤ | Mn(%)≤ | P(%)≤ | S(%)≤ |
| E185(Fe310) | 0 | - | - | - | - | - | - | - |
| E235(Fe360) | A B C D | ≤16 ＞16-25 ≤40 ＞40 | N - - E NE NE GF | 0.22 0.17 0.20 0.17 0.20 0.17 0.17 | - 0.40 0.40 0.40 0.40 0.40 0.40 | - 1.40 1.40 1.40 1.40 1.40 1.40 | 0.050 0.045 0.045 0.045 0.045 0.040 0.035 | 0.050 0.045 0.045 0.045 0.045 0.040 0.035 |
| E275(Fe430) | A B C D | ≤40 ＞40 | - E NE NE GF | 0.24 0.21 0.22 0.20 0.20 | - 0.40 0.40 0.40 0.40 | - 1.50 1.50 1.50 1.50 | 0.050 0.045 0.045 0.040 0.035 | 0.050 0.045 0.045 0.040 0.035 |
| E355(Fe510) | C D | ≤30 ＞30 ≤30 ＞30 | NE NE GF GF | 0.20 0.22 0.20 0.22 | 0.55 0.55 0.55 0.55 | 1.60 1.60 1.60 1.60 | 0.040 0.040 0.035 0.035 | 0.040 0.040 0.035 0.035 |
Stength Yield:
| Steel Number | Yield Strengh/MPa | |||||||
| ≤16 | ＞16-40 | ＞40-63 | ＞63-80 | ＞80-100 | ＞100-150 | ＞150-200 | ||
| E185(Fe310) | - | 185 | 175 | - | - | - | - | - |
| E235(Fe360) | A B BNF C D | 235 235 235 235 235 | 225 225 225 225 225 | 215 - 215 215 215 | 215 - 215 215 215 | 215 - 215 215 215 | 195 - 195 195 195 | 185 - 185 185 185 |
| E275(Fe430) | A B C D | 275 275 275 275 | 265 265 265 265 | 255 255 255 255 | 245 245 245 245 | 235 235 235 235 | 225 225 225 225 | 215 215 215 215 |
| E355(Fe510) | C D | 355 355 | 345 345 | 335 335 | 325 325 | 315 315 | 295 295 | 285 285 |
Delivery Condition:
1) +C No heat treatment after the final cold drawing process.
2) +LC After the final heat treatment there is a suitable drawing pass.
3) +SR After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere.
4) +A After the final cold drawing process the tubes are annealed in a controlled atmosphere.
5) +N After the final cold drawing operation the tubes are normalized in a controlled atmosphere.
Standard:
EN10305-2, EN10305-3 or as requested
Material:
E215, E235, E355, 26MnB5, 34MnB5 etc (including low carbon alloy steel)
Diameter Range:
10-89mm
Wall Thickness Range:
0.5-10mm
Application:
Automor, e.g. hollow stablilzer bar, drive shaft tubes, steering tube, shock absorber tube, camshaft pipe, etc. And precision machinery equipments etc.
Annual Output:
20000MT
Advantage:
SG/76 Enhanced High-precise High Frequency Welding Tube Production Line. Edge milling technology from Germany, Small outer diameter and thick wall thickness technology from YODE U.S.A. The welding machine from EFD, Norway and internal burr scrapping device from Germany. The main productions are welding tubes of small outer diameter (D) and thick wall thickness(t): t/D≥0.2. The products are of high size precision and good quality of welding line, as well as good internal burr scrapping effects.
