| Customization: | Available |
|---|---|
| After-sales Service: | Supplied |
| Warranty: | 30 Years |
|
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| Standard: | ASTM A178 , ASME SA178 , ASTM A214 , ASTM A519, DIN 2391 | Grade: | A, B, C, St 30 Si / St 30 Al / St 35 / St37 / St37.4 / St45 / St 52 / St52.4 / E215 / E235 / E355 |
|---|---|---|---|
| Size: | 3/4" (19.05), 1"(25.4) , 1-1/4"(31.75), 1-1/2"(38.1), 2" (50.8), 2-1/2"(63.5) , 3" (76.2) | Length: | 12ft (3657.6) , 15ft (4572), 16ft (4876.8), 6m , 20ft (6096) , 24ft(7315.2 ) 30ft (9144) |
| Highlight: |
carbon steel seamless tube,boiler pipe |
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DIN2391 Precision Cold Drawn Seamless Pipes and Tubes, Gr St35 St45 St52 St37.4, Cold Finished Seamless Pipe use for Hydraulic and Pneumatic.
Delivery Status: NBK (+N) BKW (+LC) GBK (+A) BKS (+SR) BK (+C) OD x WT = 4~120 x 0.5~15mm
DIN2391 St52.4+N Phosphated Hydraulic Tube
DIN 2391 ST52.4 NBK Precision Cold Drawn Seamless Tubes are high-strength, high-precision steel tubes that are normalized to improve their mechanical properties and dimensional stability. They are characterized by tight dimensional tolerances, a smooth surface finish, and excellent mechanical properties, making them suitable for demanding applications in hydraulic systems, automotive, mechanical engineering, construction, energy, and aerospace industries. The seamless construction and cold-drawing process ensure uniformity and reliability, while the normalizing treatment enhances toughness and machinability.
Final supply conditions:
Cold finished(hard)BK
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high
resistance to deformation.
Cold finished(soft)BKW
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further
processing allows a certain degree of cold forming (e.g. bending, expanding)
Cold finished and stress-relieved BKS
Heat treatment is applied following the last cold forming process. Subject to appropriate processing
conditions, the increase in the residual stresses involved enables both forming and machining to a certain
degree.
Annealed GBK The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized NBK
The last cold forming process is followed by annealing above the upper transformation point in a controlled
atmosphere.
| Steel grade |
Chemical composition,
as a percentage by mass
|
|||||
| Symbol |
Material
number
|
C max. | Si max. | Mn |
P
max.
|
S
max.
|
| St 30 Si | 1.0211 | 0.10 | 0.30 | <=0.55 | 0.025 | 0.025 |
| St 30 Al | 1.0212 | 0.10 | 0.05 | <=0.55 | 0.025 | 0.025 |
| St 35 | 1.0308 | 0.17 | 0.35 | <=0.40 | 0.025 | 0.025 |
| St 45 | 1.0408 | 0.21 | 0.35 | <=0.40 | 0.025 | 0.025 |
| St 52 | 1.0580 | 0.22 | 0.55 | <=1.60 | 0.025 | 0.025 |
|
The following alloying elements may be added:
Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%.
|
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| Steel grade | Chemical Composition(%): | ||||||
| Steel name | Steel number | C max | Si max | Mn | P max | S max | Al min |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | - |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | - |
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