What is the equivalent of S690 steel?

S690 steel has gained significant traction in the market due to its performance in heavy construction, mining, and offshore applications. Its historical significance lies in its development to meet the increasing demands for stronger and more efficient materials in modern engineering.

Alternative Names, Standards, and Equivalents

Standard Organization	Designation/Grade	Country/Region of Origin	Notes/Remarks
UNS	S690QL	USA	Closest equivalent to EN 10025-6
ASTM	A572 Grade 65	USA	Minor compositional differences
EN	S690QL	Europe	Commonly used in structural applications
DIN	1.8928	Germany	Equivalent to S690QL
JIS	SM490YB	Japan	Similar yield strength but different composition
ISO	10025-6	International	Standard for high yield strength structural steels

The differences between these grades can significantly affect performance. For instance, while S690QL and A572 Grade 65 may have similar yield strengths, their chemical compositions and toughness characteristics can vary, influencing their suitability for specific applications.

Advantages of S690 Steel

S690 alloy structural steel plate

S690 alloy structural steel plate allows for lighter, stronger structures, making it ideal for projects requiring high strength without excessive weight. Its superior strength-to-weight ratio increases payload capacity, enabling more efficient transportation and reducing overall costs. The reduced material usage also improves energy efficiency, particularly in industries like transport and construction.

Additionally, excellent formability and weldability mean it can be easily cut, shaped, and welded without compromising its structural integrity. These benefits make S690 an optimal choice for demanding applications where performance and durability are essential.

Typical Applications and End Uses

Industry/Sector	Specific Application Example	Key Steel Properties Utilized in this Application	Reason for Selection
Construction	High-rise buildings	High yield strength, weldability	Reduces structural weight
Mining	Excavator buckets	Toughness, impact resistance	Handles heavy loads
Offshore	Oil rigs	Corrosion resistance, strength	Endures harsh environments
Transportation	Bridges	High strength-to-weight ratio	Enhances load capacity

Other applications include:
- Heavy machinery components
- Structural frames for industrial buildings
- Crane booms and supports

S690 steel is chosen for these applications due to its ability to withstand significant loads while maintaining structural integrity, making it ideal for demanding environments.

The qualities of S690 steel in processing

S690 fine grain structural steel plate

Temperability

The temperability of S690 fine grain structural steel plate is an important feature to consider when selecting. This steel, in fact, can be hardened to obtain a specific hardness, adapting the properties of the material to the requirements of the project.

Robustness

Despite its hardness, S690 steel maintains good robustness, making it suitable for applications that require impact resistance.

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FAQ

Q: What is S690 steel?

A: S690 high yield & fine grain steel plate is a high strength, quenched and tempered fine-grain structural steel. Structural steel S690 is used in structures that must withstand very heavy loads. This grade is meant for structures where weight savings is important.