EN 10294-1 E355 Hollow Steel Tube Alloy Seamless Precision Steel Tube Tubes For Machining
EN 10294-1 E355 E355J2 E470 E420J2 E590K2 Hollow Steel Tube Alloy Seamless Precision Steel Tube
Introduction
EN 10294-1 outlines the specifications for hollow steel tubes, particularly focusing on seamless precision steel tubes used in machining applications. This standard covers various steel grades, including E355, E355J2, E470, E420J2, and E590K2, each with distinct properties and applications.
Material
The materials used in the production of these hollow steel tubes are alloy steels, which provide enhanced mechanical properties and resistance to wear and tear. These tubes are designed for high-performance applications, particularly in the automotive and engineering sectors.
Specification
The specifications for these tubes include dimensions, tolerances, and surface quality, ensuring they meet the rigorous demands of precision machining.
Key Features
- Seamless Construction: Provides superior strength and reliability.
- Precision Engineering: Designed for tight tolerances and high performance.
- Alloy Composition: Enhances mechanical properties and corrosion resistance.
- Versatile Applications: Suitable for various industries, including automotive and machinery.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Mo (%) | Ni (%) |
|---|---|---|---|---|---|---|---|---|
| E355 | 0.22-0.25 | 0.15-0.40 | 1.20-1.60 | ≤0.025 | ≤0.015 | - | - | - |
| E355J2 | 0.22-0.25 | 0.15-0.40 | 1.20-1.60 | ≤0.025 | ≤0.015 | - | - | - |
| E470 | 0.25-0.30 | 0.15-0.40 | 1.20-1.60 | ≤0.025 | ≤0.015 | 0.40-0.60 | - | - |
| E420J2 | 0.20-0.25 | 0.15-0.40 | 1.20-1.60 | ≤0.025 | ≤0.015 | 0.40-0.60 | 0.10-0.15 | - |
| E590K2 | 0.30-0.35 | 0.15-0.40 | 1.20-1.60 | ≤0.025 | ≤0.015 | 0.40-0.60 | 0.10-0.15 | 0.40-0.60 |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| E355 | ≥ 355 | 490-630 | ≥ 22 | ≤ 197 |
| E355J2 | ≥ 355 | 490-630 | ≥ 22 | ≤ 197 |
| E470 | ≥ 470 | 570-700 | ≥ 20 | ≤ 207 |
| E420J2 | ≥ 420 | 540-670 | ≥ 20 | ≤ 207 |
| E590K2 | ≥ 590 | 680-800 | ≥ 18 | ≤ 217 |
Steel Grade
The steel grades specified in EN 10294-1 are designed to meet specific mechanical and chemical requirements, ensuring they are suitable for various applications.
Application
These hollow steel tubes are widely used in:
- Automotive Industry: For components requiring high strength and precision.
- Machinery Manufacturing: In the production of machine parts that demand durability.
- Construction: For structural applications where weight and strength are critical.
Possible Alternative Grades
While the specified grades are optimal for many applications, alternative grades may also be considered based on specific requirements:
- S355: A structural steel grade with good weldability and machinability.
- EN 10210: For hot-finished structural hollow sections.
- EN 10216: For seamless steel tubes for pressure purposes.
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