About Us
Eastern Steel Manufacturing Co.,Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products and fittings. We supply first-step processing, semi-finished parts and finished parts to help our clients meet fabrication requirements beyond their capacity or to improve operations by moving forward the pre-production processing.
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In this column you can find the steel pipe related articles you need, including industry trends, product standards and materials, and some technical guidelines.
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Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
Facility
Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
Projects
Many years of large-scale project experience in various fields（Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical etc.）, professional project team is responsible from receiving until the end of the project.
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.
The main products of steel / steel grade: DIN2391-1(ST35, ST45, ST52).
Seamless carbon steel pipe for machine structural purposes.
Standard:
DIN2391-1: Seamless Precision Steel Tube.
EN 10305-1: Steel tubes for precision applications – Technical delivery conditions – Part 1: Seamless cold
drawn tubes.
Size (mm):
Outer Dimensions: 4.0mm – 60.0mm
Wall Thickness: 0.5mm – 8 mm
Length: max 6000mm
DIN 2391 seamless precision tubes applications – Used in Hydraulic & pneumatic cylinder, Mechanical and Automotive engineering.
Steel grade: DIN2391-1(ST35, ST45, ST52)
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’requirements.
DIN2391-1: CHEMICAL COMPOSITIONS (%)
| Si | Mn | P | S |
| ≤0.35 | ≥0.40 | ≤0.050 | ≤0.050 |
| ≤0.35 | ≥0.40 | ≤0.050 | ≤0.050 |
| ≤0.55 | ≥1.60 | ≤0.050 | ≤0.050 |
DIN2391-1: MECHANICAL PROPERTIES
| Grade | BK | BKW | ||
| RmN/mmmin | min | RmN/mmmin | min | |
| ST35 | 480 | 6 | 420 | 10 |
| ST45 | 580 | 5 | 520 | 8 |
| ST52 | 640 | 4 | 580 | 7 |
| Grade | BKS | ||
| N/mmmin | ReHN/mmmin | min | |
| ST35 | 420 | 315 | 14 |
| ST45 | 520 | 375 | 12 |
| ST52 | 580 | 420 | 10 |
| Grade | GBK | NBK | |||
| N/mmmin | min | N/mmmin | ReHN/mmmin | min | |
| ST35 | 315 | 25 | 340-470 | 235 | 25 |
| ST45 | 390 | 21 | 440-570 | 235 | 21 |
| ST52 | 490 | 22 | 490-630 | 355 | 22 |
E-mail: sales@eastern-steels.com
