EN 10210-2 S275J0H S355J0H S355K2H S420NLH S460NLH Hot Rolling Structural Hollow Non-Alloy Steel Tube for Structural Purposes
Introduction
The EN 10210-2 standard specifies technical delivery conditions for hot finished hollow sections of non-alloy and fine grain structural steels. This article focuses on the steel grades S275J0H, S355J0H, S355K2H, S420NLH, and S460NLH, which are commonly used in structural applications. We will discuss the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades.
Material and Specification
The EN 10210-2 standard covers hot finished structural hollow sections made from non-alloy and fine grain steels. The steel grades mentioned in this article are:
- S275J0H
- S355J0H
- S355K2H
- S420NLH
- S460NLH
These steel grades are suitable for various structural purposes and are widely used in construction, engineering, and other related industries.
Key Features
The key features of EN 10210-2 S275J0H, S355J0H, S355K2H, S420NLH, and S460NLH steel tubes include:
- Hot finished: These hollow sections are produced by hot rolling, ensuring excellent surface finish and dimensional accuracy.
- Non-alloy: The steel grades mentioned are non-alloy steels, which means they do not contain significant amounts of alloying elements.
- Fine grain: These steels have a fine grain structure, which enhances their strength and toughness.
- Structural purposes: The tubes are specifically designed for use in structural applications, providing strength and stability to various constructions.
Chemical Composition
The following table presents the chemical composition of EN 10210-2 S275J0H, S355J0H, S355K2H, S420NLH, and S460NLH steel grades:
| Steel Grade | Chemical Composition (%) |
| S275J0H | C: ≤0.2, Mn: ≤1.5, Si: ≤0.55, P: ≤0.03, S: ≤0.03 |
| S355J0H | C: ≤0.22, Mn: ≤1.6, Si: ≤0.55, P: ≤0.03, S: ≤0.03 |
| S355K2H | C: ≤0.22, Mn: ≤1.6, Si: ≤0.55, P: ≤0.03, S: ≤0.03 |
| S420NLH | C: ≤0.2, Mn: ≤1.7, Si: ≤0.6, P: ≤0.03, S: ≤0.025 |
| S460NLH | C: ≤0.2, Mn: ≤1.7, Si: ≤0.6, P: ≤0.03, S: ≤0.025 |
Mechanical Properties
The mechanical properties of EN 10210-2 S275J0H, S355J0H, S355K2H, S420NLH, and S460NLH steel grades are as follows:
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
| S275J0H | ≥275 | 430-580 | ≥23 |
| S355J0H | ≥355 | 510-680 | ≥22 |
| S355K2H | ≥355 | 510-680 | ≥22 |
| S420NLH | ≥420 | 520-680 | ≥19 |
| S460NLH | ≥460 | 540-720 | ≥17 |
Steel Grade and Application
The mentioned steel grades have various applications in structural engineering, construction, and related industries. Here are some examples of their typical uses:
- S275J0H: This grade is suitable for general structural purposes, such as building frames, bridges, and machinery support structures.
- S355J0H: It is commonly used in the construction of multi-story buildings, stadiums, and infrastructure projects.
- S355K2H: This grade finds application in offshore structures, power plants, and heavy machinery.
- S420NLH: It is often used in the construction of pressure vessels, storage tanks, and steel structures subjected to low temperatures.
- S460NLH: This grade is suitable for applications requiring high strength, such as crane booms, mining equipment, and heavy-duty machinery.
Possible Alternative Grades
While the mentioned steel grades are widely used, there are alternative grades available that may suit specific requirements. Some possible alternative grades include:
- S235JRH: This grade offers similar properties to S275J0H but with a lower yield strength.
- S355NH: It is an alternative to S355J0H, providing similar mechanical properties.
- S355NLH: This grade is an alternative to S355K2H, offering comparable strength and toughness.
- S460NH: It provides higher yield and tensile strength compared to S460NLH.
It is important to consult the relevant standards and specifications to determine the most suitable alternative grade for specific applications.
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