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Help CenterPrecision Dimension Mechanical Properties Tailored Seamless Steel Tubes and Pipe
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Precision Dimension Mechanical Properties Tailored Seamless Steel Tubes and Pipe
OD15-80mm WT1-12mm
Scope: This standard defines the technical delivery conditions for seamless precision steel tubes according to DIN 2391 Part 1 which are made from the steel grades listed in section.
Shape: The tubes shall be furnished in the following shapes, as specified by the purchaser: round, square,rectangular and special sections.
Packing: Wrapped with polywoven bags, we use steel belt to pack the outside, polywooden cases or wooden boxes for thin wall thickness can be offered if required
Chemical Composition& Mechanical Properties(Type: Cold Drawn Seamless Mechanical/CDS)
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%. | ||||||
Final supply conditions
| Designation | Symbol | Description |
| 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. |
Special needs for mechinical properties are welcomed.
1.tensile strength
2.yeild strength
3.elongation
4.hardness
5.grain structure-----------------
Please feel free to mention when inquire.
Want a Quick Quote? Fill in a detailed description of type of material and lengths; also please include specifics about shipping, quantity. A fast and efficient service is assured.
1. How long will it take to produce an order?
It is within 30days for order and 10days for the sample.
2. What is your minimum order?
Usually 5 ton for each size
3. What form of quotation do you offer?
FOB Tianjin, CIF and CNF Your destination
4. What is your payment term?
Payment is 30% deposit, 70% before shipment
5. Does the sample for free or not?
The samples are free if they are common sizes, You need to pay for the freight .
6.How about the Third Party Inspection ?
We have been working with DNV,TUV,SGS,BV,CO,Lloyd's etc;
Send Inquiry to This Supplier
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