DIN2393 Tube Specifications
• Procedure: welded
• Dimensions: 10.3mm – 165mm
• Thickness: 1.0mm – 25mm
• Unit Length: 1 – 12 metres
• Steel Grade: RSt 34-2,RSt 34-2,St 44-2,St 52-3
• End Shape: Beveled end, plain end, vanished, or adding plastic caps, as per customer's requirements
• Pipe Packing: In bundles, Plastic film full length wrap
Supply Condition
• BKM
• GBK (+A) After the final cold forming process the tubes are annealed in a controlled atmosphere.
• NBK (+N) After the final cold forming process the tubes are annealed above the upper transformation point in acontrolled atmosphere.
Mechanical Property
| Steel Grade | Mechanical Performance |
| GBK(+A) | NBK(+N) | BKM |
| Tensile | Elongation | Tensile | Yield | Elongation | Tensile | Elongation |
| Symbol | Material No | Strength | rate | Strength | Strength | rate | Strength | rate |
| (Rm mpa) | (A5 %) | (Rm mpa) | (Reh mpa) | (A5 %) | (Rm mpa) | (A5 %) |
| RSt 34-2 | 1.0034 | 300 | 28 | 310~410 | 205 | 28 | 330 | 8 |
| RSt 37-2 | 1.0038 | 315 | 25 | 340~470 | 235 | 25 | 390 | 7 |
| St 44-2 | 1.0044 | 390 | 21 | 410~540 | 255 | 21 | 440 | 6 |
| St 52-3 | 1.0570 | 490 | 22 | 490~630 | 355 | 22 | 540 | 5 |
Chemical Composition
| Steel Grade | Chemical Composition, as a percentage by mass |
| Symbol | Material No | C | Si | Mn | P | S |
| Max. | Max. |
| Max. | Max. |
| RSt 34-2 | 1.0034 | 0.15 | 0.30 | ≤0.60 | 0.025 | 0.025 |
| RSt 37-2 | 1.0038 | 0.17 | 0.30 | ≤0.70 | 0.025 | 0.025 |
| St 44-2 | 1.0044 | 0.21 | 0.35 | ≤1.10 | 0.025 | 0.025 |
| St 52-3 | 1.0570 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
Advantages of Haotan Tube
• Precise custom outer diameter and inner diameter
• Tight tolerances, resulting in reduced machine time / Dimensional accuracy
• Smooth and Clean OD and ID surfaces
• Excellent machining characteristics
• Wider range of physical properties attainable through process and annealing options
Manufacturing Process
