Steel S355J2G4

Basic Information

Standard Source:
S355J2G4 is a high-strength low-alloy (HSLA) structural steel specified in the European standard EN 10025-3:2004 (Hot-formed structural steel sections). It is designed for applications requiring high yield strength, excellent toughness, and good weldability, particularly in cold environments.

 

Key Properties:

 

Yield Strength: Minimum 355 MPa (for thickness ≤ 16 mm).

Toughness: Meets impact resistance requirements at -20°C (V-notch 冲击试验,minimum 冲击功 ≥ 27 J).

Weldability: Suitable for various welding processes due to its low carbon equivalent and controlled chemical composition.

Deoxidation and Purity: Classified as a fully killed steel (G4) with strict control over impurities (e.g., sulfur, phosphorus), ensuring consistency in mechanical properties.

Naming Rule

 

Chemical Composition (Typical)

Element	Content Range (%)	Notes
Carbon (C)	≤ 0.22	Controls hardness and weldability
Silicon (Si)	≤ 0.55	Improves strength and deoxidation
Manganese (Mn)	≤ 1.60	Enhances strength and hardenability
Phosphorus (P)	≤ 0.025	Strict limit to avoid brittleness
Sulfur (S)	≤ 0.015	Reduces sulfide inclusions for ductility
Aluminum (Al)	≥ 0.015 (soluble)	Used for deoxidation and grain refinement

 

 

Applications

S355J2G4 is widely used in:

 

Structural engineering: Bridges, buildings, and industrial frameworks.

Mechanical equipment: Heavy machinery and vehicle components.

Offshore and marine structures: Where high toughness and corrosion resistance are required.

Cold-climate applications: Due to its reliable performance at low temperatures.

 

 

 

Comparison with Similar Grades

S355K2G4: Similar to S355J2G4 but with higher impact toughness requirements (often tested at -20°C with stricter certification).

S355JR: Lower toughness grade (impact tested at +20°C, suitable for warmer environments).

ASTM A572 Grade 50: Equivalent American HSLA steel, but with different impact testing standards.

Standards and Certification

Complies with EN 10025-3:2004 for chemical composition, mechanical properties, and testing.

May require additional certifications (e.g., EN 10204 3.1 or 3.2) for traceability and quality assurance in critical applications

 

 

 

 

 

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 Steel S355J2G4, 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.

Hot Tags: steel s355j2g4, China steel s355j2g4 suppliers, factory, Low carbon High strength, HR500LA, CR210IF, HR0 Steel, CR180BH, CR240LA