S355NL steel is a high-strength, low-alloy (HSLA) structural steel grade with enhanced toughness, primarily used in demanding construction and engineering applications. This steel grade is known for its excellent mechanical properties and is part of the European standard EN 10025.
Key features and applications of S355NL steel include:
High Yield Strength: S355NL offers a minimum yield strength of 355 MPa, making it suitable for applications requiring exceptional load-bearing capacity. It is frequently used in the construction of buildings, bridges, and industrial machinery.
Structural Use: S355NL is primarily employed in structural applications due to its reliable structural integrity. It plays a pivotal role in supporting heavy loads and providing stability in construction projects.
Enhanced Toughness: One of the distinguishing features of S355NL is its enhanced toughness, particularly at low temperatures. This makes it suitable for use in cold environments or applications that may encounter dynamic loads.
Weldability: S355NL steel is known for its good weldability, facilitating the fabrication of welded structures and components with ease. Welded joints using S355NL maintain their structural integrity and durability.
Formability: S355NL is formable, allowing for various shaping processes like bending, rolling, and cold forming. This property is valuable for creating complex shapes and profiles needed in construction and manufacturing.
Chemical composition & Mechanical property
| Grade | C % | Si % | Mn % | P % | S % | V % | AL % | Cr % |
| S355NL | 0.180 | 0.500 | 0.9-1.65 | 0.025 | 0.020 | 0.120 | 0.020 | 0.300 |
| Cu % | Mo % | Nb % | Ni % | Ti % | N % | |||
| 0.550 | 0.100 | 0.050 | 0.300 | 0.050 | 0.015 |
The mechanical properties steel plate
| Grade | Thickness(mm) | Min Yield (Mpa) | Tensile(MPa) | Elongation(%) | Min Impact Energy | |
| S355NL | 8mm-100mm | 235Map-275Mpa | 470-630Mpa | 22% | -50 | 27J |
| 101mm-200mm | 285Mpa-315Mpa | 450-600Mpa | 21% | -50 | 27J | |
| 201mm-250mm | 275Mpa-285Mpa | 450-600Mpa | 21% | -50 | 27J | |
| The min impact energy is longitudinal energy | ||||||
Versatility: S355NL steel plates find applications in various industries, including automotive, construction, machinery, and general engineering. They are used to manufacture a wide range of components and structures, from beams and columns to machinery parts.
Conformance to Standards: S355NL steel adheres to European standards (EN 10025), ensuring consistent quality and performance in demanding structural applications.
Corrosion Resistance: While not specifically corrosion-resistant, S355NL steel can be treated or coated to enhance its resistance to corrosion, depending on the application's environmental conditions.
In summary, S355NL steel is a versatile and widely used structural steel grade known for its high strength, toughness, ease of fabrication, and compliance with industry standards. Its remarkable mechanical properties and ability to withstand heavy loads, even in challenging environments, make it a preferred choice for engineers and manufacturers seeking reliable and durable materials for various construction and engineering projects.
