DIN 2391 automotive precision seamless tubes are cold worked and come in several grades: St30Si, St30AI, St35, St45, St52.
The yield strength of DIN2391 precision tubes in the annealed (GBK) state should be at least 50% of the tensile strength. Depending on the degree of deformation, the yield strength in the cold worked (hard) (BK) and cold worked (soft) (BKW) states may be close to the tensile strength. When calculating, the cold worked (hard) state should be based on at least 50% of the tensile strength, while the cold worked (soft) state is 70%.
For precision tubes with an outer diameter of less than 30mm and a wall thickness of less than 3mm, the minimum yield strength will be less than 10 N/mm
GNEE Group specializes in the production of automotive precision tubes. If you need it, please feel free to contact us.
DIN2391 seamless Precision steel tubes Specification
| Product Name | Precision Steel Pipe |
| Technique | Cold Rolled/Cold Drawn |
| Material | 10#,20#,35#,45#,Q345B 20cr,40Cr,20CrMo 6mn 27simn 304 201 310S etc. |
| Standard | ASTM A106 ASTM A53 ASTM A179 ASTM A210 ASTM A213 GB/T3639 DIN 2448 DIN1629 DIN1626 DIN2391 DIN2444 EN10025etc. |
| Outside Diameter | 10mm-1020mm or as your request |
| Thickness | 2mm-80mm or as your request |
| Length | Single random length/double random length 5m-14m 2-12m |
Chemical Compositions (%)
| Grade | Si | Mn | P | S |
| ST35 | ≤0.35 | ≥0.40 | ≤0.050 | ≤0.050 |
| ST45 | ≤0.35 | ≥0.40 | ≤0.050 | ≤0.050 |
| ST52 | ≤0.55 | ≥1.60 | ≤0.050 | ≤0.050 |
FAQ
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A: Of course, you are welcome to visit our factory, check out our production line, and learn more about our strength and quality.
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A: Yes, we have ISO, BV, MTC certifications and our own quality testing laboratory. Third-party testing services are also available.
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A: Yes, we have a designated sea and railway freight forwarder with decades of experience, and we get the best price with the earliest ship and professional service.
Q: How long is your delivery time?
A: If we have stock, it usually takes 7 days. If not, it takes about 15-20 days to get the goods ready for delivery.
Q: Can I get some samples?
A: We are happy to provide you with free samples, but we don't offer shipping costs.
Q: What is your minimum order quantity?
A: 1 ton
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