DIN 2391 standard is mainly used to manufacture high-precision, high-strength seamless cold-drawn steel pipes, which are widely used in hydraulic and automotive manufacturing industries.
The grades under DIN2391 standard mainly include: St35, St45, St52 steel pipes.
Common pipe sizes produced by GNEE include outer diameters of more than 6mm and wall thicknesses of more than 1mm. According to the standard, the outer diameter can be as small as 4mm and as large as 260mm; the wall thickness can be as small as 0.5mm and as large as 25mm; the length of the steel pipe is generally between 3 and 12 meters, but it can also be customized according to customer requirements.
DIN 2391 seamless precision tubes
Chemical Composition of DIN 2391 Seamless Cold Drawn Tubes
| Standard | Grade | Chemical Components (%) | |||||
| Symbol | Material No. | C | Si | Mn | P | S | |
| DIN2391 | 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 | 1.058 | ≤0.22 | ≤0.55 | ≤1.60 | ≤0.025 | ≤0.025 | |
Mechanical Properties of DIN 2391 Seamless Tubes
| Mechanical properties at room temperature | |||||||||||||
| 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 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490 to 630 | 355 | 22 |
Advantages of Choosing GNEE DIN2391 seamless precision tube
GNEE exports DIN2391 standard steel pipes to 65 countries and regions around the world every year. The price is 5% lower than other suppliers. The production quality is strictly guaranteed. We will solve any doubts and provide project solutions for you! If you are looking for seamless pipes, please contact us for a quote!
If you are looking for seamless pipes, please contact us in time to get a quote! sales@gneetube.com
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FAQ
Q.Why choose Gnee?
A.With us, you will get the most competitive price, guaranteed quality, guaranteed delivery and after-sales service.
Q.Do you have a quality control system?
A.Yes, we have our own quality control laboratory. Third party testing service is also available.
Q.What is DIN2391?
A.DIN 2391 standard specifies the Seamless steel tubes used for Mechanical and Automobile.
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