IS 2062 E550 / EN 10025-6 S690QL / ASTM A514 GRADE Q / DIN 17100 STE 690 HIGH STREGTH LOW ALLOY(HSLA)

FOR ANY QUERY DROP A MAIL ON [email protected]

S690QL is a premium grade of high-strength low-alloy (HSLA) steel that stands out for its exceptional mechanical properties and versatility. This steel is specifically designed for applications requiring superior strength and toughness, making it a popular choice in various demanding industries, including construction, heavy machinery, and automotive manufacturing.

Understanding S690QL

S690QL is part of the European standard EN 10025-6, which specifies the requirements for high-strength structural steels. This grade of steel is renowned for its high yield strength, which is at least 690 MPa, making it suitable for heavy-duty applications where strength and durability are crucial.

Chemical Composition

The chemical composition of S690QL is carefully balanced to achieve its high-strength properties:

• Carbon (C): ≤ 0.20%
• Manganese (Mn): 1.50% - 1.80%
• Silicon (Si): ≤ 0.50%
• Phosphorus (P): ≤ 0.025%
• Sulphur (S): ≤ 0.015%
• Chromium (Cr): 0.30% - 0.60%
• Molybdenum (Mo): 0.10% - 0.50%
• Nickel (Ni): 0.50% - 1.00%
• Vanadium (V): 0.05% - 0.10%

These elements are combined to create a steel that is not only strong but also offers good toughness and weldability.

Mechanical Properties

S690QL exhibits impressive mechanical properties:

• Yield Strength: Minimum of 690 MPa, ensuring it can withstand significant loads and stresses.
• Tensile Strength: Ranges from 770 MPa to 960 MPa, providing excellent load-bearing capacity.
• Elongation: Typically around 14% for thicknesses up to 16 mm, indicating good ductility.
• Impact Toughness: Often tested at -40°C to ensure reliability in low-temperature environments, though specific requirements can be tailored to different applications.

These properties make S690QL ideal for applications where high strength and resistance to impact are critical.

Applications

S690QL is utilized across a range of demanding industries due to its high performance:

• Construction: Infrastructures such as bridges, high-rise buildings, and heavy-duty structures benefit from S690QL’s strength-to-weight ratio, allowing for lighter designs without sacrificing safety.
• Heavy Machinery: Components in cranes, earthmoving equipment, and other heavy machinery require the durability and strength provided by S690QL to withstand harsh operational conditions.
• Automotive Industry: Used in structural parts of vehicles, S690QL offers the necessary strength and durability for high-performance applications.
• Mining and Excavation: The steel’s toughness and wear resistance make it suitable for mining machinery and equipment subjected to abrasive environments.

Advantages

• High Strength-to-Weight Ratio: The high yield strength of S690QL allows for reduced material thickness, which translates to lighter and more cost-effective designs.
• Durability: Offers excellent resistance to wear and impact, extending the lifespan of components and reducing maintenance costs.
• Versatility: Can be used in a wide range of applications due to its balance of strength, toughness, and formability.
• Weldability: Although it is a high-strength steel, S690QL can be welded using conventional methods, though care must be taken with preheating and post-weld heat treatment if necessary.

OUR SCOPE:

METCORE ALLOYS keep stock in S690QL as raw material in sheet, plate, etc. Service to PAN INDIA AND EXPORT to most of the countries with competitive rate and great service and quality products.