ZHANGJIAGANG HUA DONG ENERGY TECHNOLOGY CO.,LTD
Zhangjiagang Hua Dong Energy Technology Co., Ltd.
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Cold Drawn Carbon Steel Welded Tube / Custom Metal Galvanized Pipe Welding
Roduction Method:
The cold drawn welded tube is produced by drawing ERW (electric resistance welded tube).During this process the sizing (wall thickness, inside and outside diameter), as well as weld integrity and surface finish is closely controlled to produce tube of the required size and mechanical property characteristics.
Main Date
Material: E355
Other Aviliable Material: E155 E195 E235 E275
Outer Diameter Range: 10-50mm
Wall Thickness Range: 1.5-8mm
t/D ≥ 0.2(Normal: t/D=0.1)
Standard: En10305-2
Process: Cold Drawn, Cold Rolling
Typical Specification
| Grade | Welding Typical Specification | Yield Strength | |
| 1 | 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.
Advantage (compare with seamless cold drawn tube)
Better shape
Improved quality surface
Tight Excentricity and wall thickness tolerances (the eccentric
Tube more safety
Good toughness at low temperature
USA Market: 90% of the cylinder in the USA market are produced with welded tubes
Cost fix Lengths More Cheaper
Advantage of Our Company
Top class of welding line: SG/76 Enhanced High-precise High Frequency Welding Tube Production Line. The tube is of small outer diameter (D) and thick wall thickness (t): t/D≥0.2, and high size precision.
Application
