| Place of Origin: | China |
|---|---|
| Certification: | ISO9001 |
| Packaging Details: | In Bundles, Woodenbox As Your Requirement |
| Name: | Seamless Precision Tube | Keyword: | Seamless Tube |
|---|---|---|---|
| OD. Range: | 6mm – 114.3mm | Wall Thickness: | 1mm-15mm |
| Standard: | GB/T3090-2000 | Grade: | ST35, ST37, ST45, ST52,ST35.2,ST52.2 |
| Length: | Max Length 12M | Certificate: | API, CE, JIS, GS, ISO9001 |
| High Light: | DIN2391 ST45 Seamless Alloy Tube,Customized Seamless Alloy Tube,din 2391 st52 Tube |
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DIN2391 ST45 ST52 Precision Steel Tubes Seamless, Cold-Drawn Precision Steel Tubes
DIN2391 Standard specification
DIN 2391 standard specifies the Seamless steel tubes used forMechanical and Automobile.
The main products of steel / steel grade: DIN2391-1(ST35, ST45, ST52).
DIN 2391 is included in DIN Handbook 3 and 272. Gives dimensions for seamless precision steel tubes; these tube dimensions have been selected from the range of manufacturable tube dimensions which are mainly used as design elements.
What is the difference between Din 2391 and Din 3304?
DIN 2391 applies to seamless precision steel tubes and in compliance with ISO/DIN 3304, those tube dimensions have been selected from the range of manufacture dimensions which are mainly used as design elements.
DIN2391 Part 2 specifies dimensions for cold finished, seamless precision steel tubes and is to be used in conjunction with DIN2391 part2 which states the relevant technical delivery conditions. The preferred sizes listed in standard are mainly used in mechanical and automotive engineering.
Where steel tubes of dimensions specified in this standard are to comply with the technical delivery conditions listed in subclause 1.2 of DIN 2391 Part 2.
DIN 2391 seamless precision tubes applications – Used in Hydraulic & pneumatic cylinder, Mechanical and Automotive engineering.
Mechanical properties
Grade and Chemical Composition ( ％ )
| Item |
Grade
|
C max |
Mn |
P max |
S max |
Si max |
| St35 | 1.0308 | 0.17 | ≥0..4 | 0.025 | 0.025 | 0.35 |
| St45 | 1.0408 | 0.21 | ≥0.4 | 0.025 | 0.025 | 0.35 |
| St52 | 1.0508 | 0.22 | ≤1.6 | 0.025 | 0.025 | 0.55 |
Mechanical properties
| item | grade |
Cold finished (Hard) (BK) |
Cold finished (Soft) (BKW) |
Cold finished and stress-relieved (BKS) |
Annealed (GBK) |
Normalized (NBK) |
|||||||
| Rm | A | Rm | A | Rm | ReH | A | Rm | A | Rm | ReH | A | ||
| MPa | ％ | MPa | ％ | MPa | MPa | ％ | MPa | ％ | MPa | ％ | |||
| 1 | ST35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
| 2 | ST45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 255 | 21 |
| 3 | ST52 | 640 | 4 | 580 | 7 | 580 | 450 | 10 | 450 | 22 | 490-630 | 355 | 22 |
FAQ
Q: What product information must I provide before making a purchase?
Please provide the grade, width, thickness, and surface treatment requirements, as well as the quantities you require.
Q: What shipping ports are there?
We normally ship from Shanghai,Tianjin, Qingdao, and Ningbo ports
Q: Is it possible to send samples?
Of course, we offer free samples and express shipping to customers all over the world.
Q: Do you offer a service for customized products?
Yes, we can produce according to your specifications and drawings.
Q: Can I pay you a visit at your factory?
Customers from all around the world are welcome to visit our factory.
Q: Can you assist me in importing steel products for the first time?
Yes, we have shipping agent who will arrange the shipment with you.
Q: Do you have any MOQ limit for production?
We don’t have any MOQ limit. But as for our steel pipe product, we usually use container transport for lower freight. In the case of express delivery, high freight charges will be generated.
Q: Is it OK to print my logo on the product or the carton packing?
Yes. Please inform us formally before our production and confirm the design firstly based on our sample.
Q: How to pack the product?
The inner layer has a waterproof paper outer layer, iron packaging, and is fixed with a fumigated wooden pallet. It
can effectively protect products from corrosion during ocean transportatio