DIN 2391 precision steel tubes can withstand high pressure, are not deformed by cold bending, are not cracked by expansion and flattening, and can be subjected to various complex deformations and mechanical processing.
Common materials for DIN 2391 seamless precision steel tubes include ST35, ST37.4, ST37, ST45, ST52, ST52.4, etc., as well as other materials such as E235, E255, E355, SAE1010, SAE1020, etc.
DIN 2391 cold-drawn precision steel tubes are widely used in hydraulic systems, automobile manufacturing, shipbuilding industry, metal processing and other fields.
Products Data
DIN 2391 High precision seamless steel pipe specification
Grade and Chemical Composition(%)
| Grade | Chemical Composition(%): | ||||
| C max | Si max | Mn | P max | S max | |
| St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
Mechanical Properties(Mpa)
| Steel Grade | Minimum values for the delivery condition | ||||||||||||
| Steel Name | Steel Number | BK | BKW | BKS | GBK | NBK | |||||||
| Rm | A % | Rm | A % | Rm | ReH | A % | Rm | A % | Rm | ReH | A % | ||
| Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | |||||||
| St 35 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340 to 470 | 235 | 25 |
| St 45 | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440 to 570 | 255 | 21 |
| St 52 | 1.058 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490 to 630 | 355 | 22 |
| Production Range | Outer Diameter: 10-120mm (0.39 inch - 4.72 inch) |
| Wall Thickness: 1-20mm (0.039 inch - 0.79 inch) | |
| Tolerance | Tolerance ±0.10mm, Superior products ±0.05mm, Can be customized according to customer's requirements |
| Technique | Cold Drawn / Cold Rolled |
| Finished Product Condition | BK, BKS, +C, +LC, +SR, +A, +N |
| Shape | Round or Special shapes |
Products display
DIN 2391 Precision bright seamless steel pipe
Why Choose GNEE
GNEE has 14 steel production lines, 10 processing equipment for processing, bending, coating, heat treatment, cutting, drilling, beveling, tempering, surface treatment, etc., complete testing equipment and strong technical force. The annual production capacity is more than 60,000 tons.
Our products are exported to more than 60 countries and regions including Russia, Canada, India, Brazil, and Southeast Asia.
If you would like to know more about our company or our products, please feel free to contact us. sales@gneetube.com
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FAQ
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A.Sure, you are welcome to visit our factory anytime.
Q.What is your after-sales service?
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Q.What is your delivery time?
A.Delivery time is usually about 1 month, if we have stock, we can ship within 7 days.
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