EN10305-3 Welded Cold Sized Tubes For Automobile
Automobile manufacturing heavily relies on precision-engineered components to meet the industry's demanding requirements. One critical component used extensively in automobiles are welded cold-sized tubes. These tubes are produced with precision and adhere to the specifications outlined in the EN10305-3 standard. This article aims to provide an overview of the material, specification, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades of EN10305-3 welded cold-sized tubes.
Material and Specification
EN10305-3 sets the standard for welded cold-sized tubes, specifying the requirements for their manufacture, properties, and dimensions. The focus of this standard is on low-carbon steel tubes with a circular cross-section. These tubes are primarily used in the automotive industry.
The standard outlines specific requirements for the size range, tolerances, mechanical properties, and chemical composition of the tubes. It also stipulates the manufacturing processes, which include cold drawing and precise sizing.
Chemical Composition
The chemical composition of EN10305-3 welded cold-sized tubes is a critical factor in determining their mechanical properties. The following table presents the typical chemical composition of these tubes:
| Element | C max (%) | Si max (%) | Mn max (%) | P max (%) | S max (%) |
| Composition | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 |
Mechanical Properties
EN10305-3 welded cold-sized tubes exhibit specific mechanical properties that meet the requirements for automotive applications. The table below showcases the typical mechanical properties of these tubes:
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
| E195 | 195 | 320-440 | 27 |
| E235 | 235 | 340-480 | 25 |
| E275 | 275 | 410-550 | 23 |
| E355 | 355 | 490-630 | 22 |
Steel Grades and Applications
EN10305-3 covers a range of steel grades suitable for different automotive applications. The most commonly used steel grades include E195, E235, E275, and E355. These grades offer varying levels of strength and are suitable for different load conditions in automobile components.
EN10305-3 welded cold-sized tubes find applications in several areas within the automotive industry. These include chassis components, stabilizer bars, steering systems, suspension systems, and other structural components where precision, strength, and reliability are essential.
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