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| DIN2391 Seamless Precision Steel Tube |
DIN2391 Seamless Precision Steel Tube
DIN 2391 standard specifies theSeamless Precision Steel Tube used for Mechanical and Automobile.
Carbon steel tubes for machine structural purposes .
Standard:
Standard:
- DIN2391-1: Seamless Precision Steel Tube.
- EN 10305-1: Steel tubes for precision applications.
Size (mm):
- Outer Dimensions: 4.0mm-60.0mm
- Wall Thickness: 0.5mm-8 mm
- Length: max 6000mm
Application:
- motor-car construction
- pneumatic
- hydraulic operating mechanisms
Steel grade:
- DIN2391-1 ST35
- DIN2391-1 ST45
- DIN2391-1 ST52
Delivery Condition:
- GBK, BKS, BK, BKW, NBK
Inspection and Test:
- Chemical Composition, Mechanical Properties
- Visual and Dimension Test
- NDT
- Grain Size Test
Surface treatment:
- Oil-dip, Varnish, Shot Blasting
Packing:
- Inner packing:Caps on two ends of every pipe
- Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
- Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
- Marking: as per customers requirement
DIN2391-1: Chemical compositions(%)
| Grade | C | Si | Mn | P | S |
| DIN2391 ST35 | ≤0.17 | ≤0.35 | ≥0.40 | ≤0.050 | ≤0.050 |
| DIN2391 ST45 | ≤0.21 | ≤0.35 | ≥0.40 | ≤0.050 | ≤0.050 |
| DIN2391 ST52 | ≤0.22 | ≤0.55 | ≥1.60 | ≤0.050 | ≤0.050 |
DIN2391-1: Mechanical properties
| Grade | BK | BKW | BKS | GBK | NBK | |||||||
| Rm N/mm min | min | Rm N/mm min | min | N/ mm min | ReH N/mm min | min | N/ mm min | min | N/mm min | ReH N/mm min | min | |
| DIN2391 ST35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
| DIN2391 ST45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 235 | 21 |
| DIN2391 ST52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490-630 | 355 | 22 |
