Steel for general structural applications

General structural steels where high tensile steel is widely used in general structural applications due to their superior strength and mechanical properties. The following is technical information about the grades and mechanical properties of high-tensile steels used in general structural applications:

Grades of High Tensile Steel:

ABS EH36:

• Steel Strength: Generally has cork stress or yield strength of 355 MPa. This allows for the design of lighter structures, good corrosion resistance.
• Tensile Strength: Typically between 470 and 630
• Impact Test at -40⁰C
• Applications: It uses a wide range of structures, including bridges, buildings, and construction equipment, and is superior to A572gr50 grade steel, which can be used to build cargo ships.

EN10025 S355J2+N:

• Steel Strength: Generally has cork stress or yield strength of 355 MPa. This allows for a lighter and more cost-effective structural design.
• Tensile Strength: Typically between 470 and 630MPa
• Impact Test: at -20⁰C
• Applications: Operate a wide variety of structures, including bridges, buildings, and construction equipment.

ASTM A572 เกรด 50:

• Yield Strength: A minimum of 345 MPa makes it one of the most widely used high-strength steels in America.
• Tensile Strength: Range from 450 to 600 MPa
• Usage: Commonly used in structures for buildings and bridges.

Advantages of using high tensile steel:

1. Weight loss: due to its higher strength. Therefore, less material is required to achieve the same performance as lower grade steel. As a result, it has a lighter structure.
2. Cost-effectiveness: High-tensile steel can reduce the overall cost of a project by minimizing the amount of steel required, and as a result, lower transportation and assembly costs.
3. Durability: These steels are designed to withstand harsh conditions. This makes them ideal for structures that are exposed to high stress or harsh environments.
4. Design Flexibility: The high tensile strength of steel allows for innovative architectural designs that are not possible with conventional steel grades.

Challenges and Considerations:

• Weldability: Higher strength steels can be more challenging to weld. It requires special techniques and considerations during the design and manufacturing phase.

Conclusion:

High-tensile steel is a key material in the construction industry, combining strength, performance, and versatility that is unmatched by other materials. Its use in general steel structures has revolutionized the design approach of architects and engineers. This makes it more extensive taller buildings and more creative architectural styles.

The grade and mechanical properties of high-tensile steels make them suitable for a wide range of applications from the main frame of the skyscraper to the intricate details of modern sculpture. As technology advances, the development of steel grades and new manufacturing methods will continue to push the boundaries of what's possible in structural engineering.

To comprehensively understand the role of high-tensile steel in structural engineering it is important to consider not only mechanical properties but also the practical application characteristics, including processing, welding and corrosion protection.