EN10025-6 S690Q S690QL S690QL1 HSLA Structural Steel

EN 10025-6 S690Q, S690QL, and S690QL1 HSLA structural steels are advanced quenched and tempered high-strength low-alloy (HSLA) steel plates designed for demanding load-bearing applications. With a minimum yield strength of 690 MPa, these grades offer an outstanding balance of strength, toughness, and weldability, enabling engineers to design lighter, safer, and more efficient structures.

As a professional supplier of high-strength steel plates, GNEE Steel provides EN 10025-6 S690 series plates to global customers across construction, offshore, mining, and heavy machinery industries.

The EN10025-6 standard defines technical requirements for hot-rolled, quenched, and tempered HSLA structural steel plates with a minimum yield strength of 460 MPa to 960 MPa.

Among them, the S690 series (S690Q, S690QL, S690QL1) stands out for its 690 MPa minimum yield strength, making it ideal for heavy-duty load-bearing structures.

Key differences between the three grades lie in their impact toughness requirements:

• S690Q offers standard toughness with a minimum impact energy of 34 J at -20°C;
• S690QL features enhanced low-temperature toughness (34 J at -40°C);
• S690QL1 provides superior toughness (34 J at -60°C), suitable for extreme cold environments.

All grades from GNEE Steel meet strict EN10025-6 chemical composition and mechanical property standards, with tensile strength ranging from 770 MPa to 940 MPa.

Typical mechanical properties for EN 10025-6 S690 steels include:

Yield strength: ≥ 690 MPa

Tensile strength: 770–940 MPa

Elongation: ≥ 14%

Impact toughness: As per grade designation

These properties allow designers to reduce plate thickness while maintaining structural safety, resulting in lower fabrication and transportation costs.

EN 10025-6 S690 HSLA steels feature controlled carbon and alloy content, ensuring excellent weldability.

 

Fabrication Advantages

• Low carbon equivalent (CEV)
• Reduced risk of cold cracking
• Suitable for welding, cutting, and forming
• Compatible with standard welding processes (MAG, SAW, FCAW)

Proper welding procedures, including preheating when required, ensure reliable performance in critical structures.

The versatility of EN10025-6 S690Q/S690QL/S690QL1 makes them widely used in:

Construction industry: Large-span bridges, high-rise building frameworks, and stadiums (e.g., steel columns, beams).

Engineering machinery: Excavator arms, crane booms, and dump truck bodies, where high strength and durability are critical.

Offshore and marine: Offshore platforms, ship hulls, and coastal structures (S690QL/S690QL1 for low-temperature marine areas).

Mining and energy: Mine supports, power plant boilers, and wind turbine towers, adapting to heavy-load and harsh working conditions.

As a Google-optimized and customer-centric supplier, GNEE Steel offers unique advantages to drive your project success:

• Strict quality control: From raw material selection to final delivery, all products pass ISO 9001 certification and third-party inspections (e.g., BV, SGS).
• Customization capacity: Provide plates in thicknesses of 6mm-200mm, widths of 1500mm-4000mm, and lengths up to 12000mm, with cutting and drilling services.
• Competitive pricing: Direct factory supply eliminates middlemen, ensuring cost-effectiveness without sacrificing quality.
• Timely delivery: Large inventory (over 10,000 tons of S690 series in stock) and global logistics partnerships guarantee on-time delivery to 80+ countries.
• Professional support: Our team of HSLA steel experts provides technical consultation, material selection guidance, and after-sales service 24/7.

To receive an accurate and competitive quote, please provide:

• Grade (S690Q, S690QL, or S690QL1)
• Plate thickness, width, and length
• Quantity and delivery port
• Any special testing or inspection requirements

We respond to inquiries within 24 hours with professional solutions.

If you are looking for EN 10025-6 S690Q, S690QL, or S690QL1 HSLA structural steel plates, GNEE Steel is your reliable partner.

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What material is EN 10025 6 S690QL?

S690QL is a high-strength quenched and tempered steel grade that meets the EN 10025 specification. The name S690QL stands for a minimum yield strength of 690 MPa. This steel is engineered to deliver high strength, toughness, wear resistance, and excellent weldability for demanding applications.

What is the difference between S690Q and S690QL?

S690Q: Minimum impact toughness tested at -20°C (30J average). → Typical Use: Cranes in temperate climates, quarry equipment. S690QL: Certified for -40°C and below (≥40J impact toughness). → Critical Use: Arctic pipelines, offshore platforms, mining vehicles in Siberia.

What is the yield strength of S690QL material?

690 MPa

S690QL is a high strength quenched and tempered steel grade that complies to steel specification EN 10025. The designation S690QL refers to a minimum yield strength of 690 MPa.

What is EN 10025-6 S690QL equivalent to?

A709 grade 100 material is usually considered the EN 10025-6 S690QL equivalent ASTM steel. Besides, S690QL equivalent ISO steel is E690.

GNEE Steel also supplies a variety of high-strength steel plates, such as A514 Grade F, A572 Grade 50, A588 Grade A, S355JR, S690Q, SS400, S690QL, Q345B, Q345E, etc. If you want to know more about other types of steel plates, you can call the consultation hotline at +8615824687445 or send an email to alloy@gneesteelgroup.com. You are welcome to consult us, and we are very willing to answer your questions.