EN10305-2 Cold Drawn Welded Steel Tube for Telescopic Cylinder
EN10305-2 is a European standard that specifies the technical requirements for cold-drawn welded Precision Steel Tubes for use in hydraulic and pneumatic systems. These tubes are made from low carbon steel and are used in telescopic cylinders, where high strength and durability are required.
Material
The material used to make EN10305-2 tubes is low carbon steel with a maximum carbon content of 0.22%. This type of steel is also known as mild steel or carbon steel. Low carbon steel is a popular choice for hydraulic and pneumatic systems because of its high strength and good weldability.
Specification
The EN10305-2 standard specifies the following technical requirements for cold-drawn welded precision steel tubes:
- Size range: Outer diameter 6-120mm, Wall thickness 1-15mm
- Length: 5800mm or as required
- Steel grades: E215, E235, E355, E255, E410
- Delivery condition: +C (BK), +LC (BKW), +SR (BKS), +A (GBK), +N (NBK)
Chemical Composition
The chemical composition of the steel used to make EN10305-2 tubes is as follows:
| Steel Grade | Chemical Composition |
| E215 | C≤0.10, Mn≤0.70, Si≤0.35, P≤0.025, S≤0.025 |
| E235 | C≤0.17, Mn≤1.20, Si≤0.35, P≤0.025, S≤0.025 |
| E355 | C≤0.22, Mn≤1.60, Si≤0.55, P≤0.025, S≤0.025 |
| E255 | C≤0.21, Mn≤0.80, Si≤0.35, P≤0.025, S≤0.025 |
| E410 | C≤0.22, Mn≤1.60, Si≤0.55, P≤0.025, S≤0.025 |
Mechanical Properties
The mechanical properties of the steel used to make EN10305-2 tubes are as follows:
| Steel Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| E215 | 430-580 | ≥215 | ≥30 |
| E235 | 480-630 | ≥235 | ≥25 |
| E355 | 640-840 | ≥355 | ≥22 |
| E255 | 530-630 | ≥255 | ≥22 |
| E410 | 740-940 | ≥410 | ≥22 |
Steel Grade
EN10305-2 specifies five steel grades for cold-drawn welded precision steel tubes. These grades are E215, E235, E355, E255, and E410. The selection of the steel grade depends on the application and the required mechanical properties.
Application
EN10305-2 tubes are primarily used in hydraulic and pneumatic systems, where high strength and durability are required. They are commonly used in telescopic cylinders, where the tubes need to withstand high pressure and heavy loads. These tubes are also used in other applications such as automotive, construction, and industrial equipment.
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