15-110mm Hexagon Shape Series Seamless Steel Pipes & Tubes Steel
USD $680 - $1,250 /Metric Ton
Min.Order:5 Metric Tons
Hebei Province Gold Mysterious Pipe Co., Ltd.
Hexagonal 15-110mm Hexagon Shape Series Seamless Steel Pipes & Tubes Steel
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. Tubes according to this standard are mainly used where accuracy to dimension and possibly, small wall thickness and good surface condition are required.
Shape: HEX
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 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 | 1.0508 | 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. |
delivery condition | cold finished/ HARD(BK)
| cold finished/ SOFT(BKW)
| Annealed (GBK)
| Normalized (NBK)
| ||||
CODE NO. | Material NO. | TENSILE/mpa | ELONGATION/% | TENSILE /mpa | Elongation/% | TENSILE /mpa | Elongation/% | TENSILE /mpa |
ST35 | 1.0308 | 440 | 6 | 370 | 10 | 315 | 25 | 340-470 |
ST45 | 1.0408 | 540 | 5 | 470 | 8 | 390 | 21 | 440-570 |
ST52 | 1.0508 | 590 | 4 | 540 | 7 | 490 | 22 | 490-630 |
TYPE 1.
A=FLAT TO FLAT SIZE
B=CORNER TO CORNER SIZE
WT=WALL THICKNESS
TYPE2.
****OD &INNER FLAT TO FLAT SIZE
TYPE 3:
*****ID&FLAT TO FLAT SIZE&CORNER SIZE
* How long will it take to produce an order?
It is within 30days for the purchasing and production time with container order and 10days for the sample.
* What is your minimum order?
Usually 5 ton for each size.
* What form of quotation do you offer?
FOB Tianjin, CIF and CNF Your destination
* What is your payment term?
Payment is 30% deposit, 70% before shipment
* Does the sample for free or not?
The samples are free if they are common sizes, You need to pay for the freight .
* How do you guarantee the quality of the products?
All of our procedures are strictly operated under the ISO 9001:2008, and there are as many as 6 times of test during the production of each product to ensure the quality.