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Help CenterHydraulic and Pneumatic Cold Drawn Seamless Steel Tube EN10305-4 E215 E235 E355
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Certification:ISO 14001 ISO 9001-2008 TS 16949 EN 10204.3.1 TUV NK
EN10305-4 E215 E235 E355 Hydraulic and Pneumatic Seamless Cold Drawn Tubes
Standard: EN10305-4 Seamless Cold Drawn Tubes for Hydraulic and Pnematic Systems
Steel tubes for precision applications.Technical delivery conditions
Applications: for hydraulic and pneumatic power systems
Size range: O.D.:6-80mm W.T.:0.5-12.5mm L: max12000mm
Manufacturing Process:
Steelmaking process:
The steelmaking process is at the discretion of the manufacturer
Steels are fully killed.
Tube manufacturing and delivery conditons:
The tubes are manufactured from hot finished seamless tubes by cold working.
Cold working is also applicable when actual production is needed.
Tubes are delivered in the delivery condition +N , means that after the final cold drawing operation, the tubes are normalized in a controlled atmosphere.
Tube apperance:
Both internal and external surface finish of the tubes smooth after cold forming as well as after Normalized Heat treatment, Suface quality would be without ridges, dents or shallow grooves.
The tube have smooth outer and inner surfaces with a roughness Ra≤ 4μm
Areduced roughness of Ra ≤2μm is workable for inner surface, the best ID roughness we could reach 0.4-0.8 μm only by cold drawing.
Steel Grade and Chemical Compositions:
| Steel Grade | C | Si | Mn | P | S | Al | |
| Steel Name | Steel Number | max | max | max | max | max | min |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | - |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | - |
| Permissible deviations of the product anaysis from the specified limits given in Table 1 | ||
| Element | Specified limit of the cast analysis % by mass | Permissible deviation of the product analysis % by mass |
| C | ≤0.22 | +0.07 |
| Si | ≤0.55 | +0.05 |
| Mn | ≤1.60 | +0.1 |
| P | ≤0.025 | +0.005 |
| S | ≤0.015 | +0.003 |
| Al | ≤0.025 | --0.005 |
| Mechanical properties at room temperature | ||||
| Steel Grade | Yield strengtha ReH min Mpa | Tensile strengtha Rm min Mpa |
Elongation A min % | |
| Steel Name | Steel Nubmer | |||
| E215 | 1.0212 | 215 | 290-430 | 30 |
| E235 | 1.0308 | 235 | 340-480 | 25 |
| E355 | 1.0580 | 355 | 490-630 | 22 |
Test methods:
Tensile test
Flattening test
Drift expanding test
Dimensional inspection
Visual examination
Leak tightness test
Normative references:
EN10002-1, Metallic materials- Tensile testing- Part 1: Method of test at ambient temperaure
EN10020, Definition and classification of grades of steel
EN10021, Gengeral technical delivery requirements for steel and iron products.
EN10027-1, Designation systems for steel - Part 1: Steel names, principlal symbols.
EN10027-2, Designation systems for stee l- Part 2: Numerial system
EN10052, Vocabulary of heat treatment terms for ferrous produ
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