Overview of S355J2G3 High-Tensile Steel

S355J2G3 is a high-strength structural steel defined by the European standard EN 10025-2, classified as High Strength Low Alloy (HSLA) steel. It offers excellent comprehensive mechanical properties and processability, making it widely applicable in structural engineering projects requiring high strength, toughness, and weldability.

Key Characteristics

1. High Strength and Toughness

Yield Strength: 355 MPa class (≥355 MPa for thickness ≤16mm), meeting the requirements of long-span and heavy-load structures.

Low-Temperature Impact Toughness: Excellent impact resistance at -20°C (≥27J in Charpy V-notch test), suitable for cold regions or dynamic load applications (e.g., bridges, cranes).

2. Good Weldability and Processability

Low Carbon Equivalent (CEV) (typically ≤0.42%): Minimizes cracking risk during welding, compatible with various welding processes (e.g., arc welding, gas shielded welding).

Formability: Can be hot-rolled, cold-formed, and machined into complex shapes.

3. Fatigue Resistance and Corrosion Resistance

Uniform Microstructure (ferrite + pearlite): Enhances resistance to fatigue crack propagation.

Microalloying Elements (e.g., Nb, V): Refine grain structure and improve corrosion resistance (superior to ordinary carbon steel).

Applications

Construction Engineering: High-rise steel structures, industrial plants, and long-span stadium frames (beams, columns).

Bridge Engineering: Main girders and pier supports for railway/road bridges, especially in cold or offshore environments.

Mechanical Manufacturing: Bases for heavy machinery, mining equipment frames, and crane booms under cyclic loading.

Energy and Chemical Industry: Wind turbine towers, pressure vessels, and chemical equipment supports.

 

Chemical Composition (typical values, % for thickness ≤16mm):

C ≤0.22, Si ≤0.55, Mn ≤1.60, P ≤0.025, S ≤0.025, Nb 0.005–0.050, V 0.01–0.12, Ti ≤0.030.

 

 

 

 

 

 

Specification we supply：

Thickness	3-200mm
Width	1500-4000mm
Length	5000-15000mm

 

 

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our S355J2G3 High Tensile Steel, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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