BS EN10305-1 Seamless Steel Tube
This European Standard specifies the technical delivery conditions for seamless cold-drawn steel pipes of circular cross-section for precision applications and with a specified outer diameter D < 380 mm.
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BS EN10305-1 Seamless Steel Tube Supplier-GNEE
This European Standard specifies the technical delivery conditions for seamless cold-drawn steel pipes of circular cross-section for precision applications and with a specified outer diameter D < 380 mm. This document can also be applied to other types of cross sections. Pipes according to this document are characterized by precisely defined dimensional tolerances and specified maximum surface roughness. Typical areas of application are the automotive, furniture and general engineering industries.
Equivalent standards: ASTM A519, DIN 2391
Grades(mainly used): E235, E355
O.D.: 6-380mm W.T.:1-35mm L: max12000mm
Delivery condition: Cold drawn, Annealed, Normalized, Quench/Tempered
Application: Seamless circular steel tubes for mechanical and general engineering purposes.
Chemical Composition (%) of EN 10305-1
| Steel grade Name |
Steel Number |
C(% max) | Si(% max) | Mn(% max) | P(% max) | S(% max) |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.015 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.015 |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.015 |
Mechanical and technological properties of EN 10305-1
| Yield strength (min Mpa) |
Tensile strength (min Mpa) |
Elongation (min %) |
| 215 | 290-430 | 30 |
| 235 | 340-480 | 25 |
| 355 | 490-630 | 22 |
Condition on delivery of EN 10305-1:
| Term | Symbol | Explanation |
| Cold-finished/hard (cold-finished as-drawn) |
BK | No heat treatment after the last cold-forming process. The tubes therefore have only low deformability. |
| Cold-finished/soft (lightly cold-worked) |
BKW | After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits. |
| Annealed | GBK | After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum. |
| Normalized | NBK | The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum. |
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About Us
GNEE Group is located in Anyang City, Henan Province. It was established in 2008 and has 15 years of export experience. Although we have not been established for a long time, we have become a well-known steel pipe supplier group in China. Every year, steel pipes are exported to more than 150 countries and regions such as France, India, South Korea, Thailand, and Chile, with the export volume reaching 50 million tons. As a professional supplier, GNEE Group provides hundreds of steel pipe products, such as common A333 low-temperature carbon steel pipes, A335 alloy seamless pipes, S355JR spiral welded pipes, etc. You are welcome to purchase at any time.
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