↵ As global infrastructure and heavy equipment projects demand higher load capacity, lighter structures, and enhanced safety, S690QL structural steel with a high yield strength has become a preferred material for modern engineering applications. Defined by EN 10025-6, S690QL combines exceptional mechanical strength, excellent low-temperature toughness, and reliable weldability, making it ideal for demanding structural environments.
As a professional high-strength steel supplier, GNEE Steel delivers certified S690QL plates to customers worldwide, supporting complex projects with consistent quality and technical expertise.
What Is S690QL Structural Steel?
S690QL is a quenched and tempered high-yield structural steel plate specified in EN 10025-6.
- S – Structural steel
- 690 – Minimum yield strength of 690 MPa
- QL – Guaranteed impact toughness at –40°C
The steel number 1.8928 further identifies S690QL in European material systems. This combination of strength and toughness allows engineers to design safer and more efficient structures.
Advantages of Using High-Yield S690QL Steel
Choosing S690QL structural steel delivers multiple engineering and economic benefits:
- Reduced structural weight through thinner plate design
- Lower steel consumption and transport costs
- Improved load-bearing efficiency
- Longer service life with reduced maintenance
- Enhanced safety margin in critical structures
Compared to conventional grades such as S355 or S460, S690QL offers a significant performance upgrade.

Chemical Composition and Metallurgical Advantages
The superior performance of S690QL high yield structural steel results from its optimized chemical composition and controlled heat treatment.
Balanced carbon content for strength and weldability
Alloying elements such as Mn, Ni, Cr, and Mo
Quenched and tempered microstructure for toughness and stability
This metallurgical design enables S690QL to achieve high yield strength without excessive brittleness.
Typical Mechanical Property Ranges of S690ql Steel Plates
|
Designation |
Mechanical Properties (ambient temperature) |
||||||
|
Min. % elongation after fracture |
Number |
Reh MPa Minimum Yield Strength |
Rm MPa Tensile Strength |
||||
|
(milimeter) Nominal thickness |
(milimeter) Nominal thickness |
||||||
|
≥100 ≤150 |
≥50 ≤100 |
≥3 ≤50 |
≥3 ≤50 |
≥100 ≤150 |
≥50 ≤100 |
||
|
14 |
1.8931 |
630 |
650 |
690 |
770/940 |
710/900 |
760/930 |
Key Applications of S690QL High-Yield Steel
The exceptional strength and durability of S690QL make it ideal for applications that demand reliable performance under extreme conditions. Here are the core industries where GNEE Steel's S690QL steel plates are widely utilized:

Heavy Machinery & Equipment: Used in the manufacturing of excavators, cranes, bulldozers, and mining equipment-components that require resistance to wear, impact, and heavy loads.
Infrastructure & Bridge Construction: Suitable for bridge girders, support structures, and high-rise building frameworks, where structural integrity and long-term durability are non-negotiable.
Renewable Energy: A preferred material for wind turbine towers and offshore energy structures, as it can withstand harsh weather conditions and cyclic loading.
Transportation: Utilized in the production of heavy-duty truck frames, railway carriages, and shipbuilding components, ensuring safety and reliability in transit.
Why Choose GNEE Steel for Your S690QL Requirements?
As a trusted S690QL supplier with years of experience in the steel industry, GNEE Steel combines strict quality control, advanced production capabilities, and customer-centric services to deliver superior products that drive project success. Here's what sets us apart:
1. Uncompromising Quality: Our S690QL steel plates are manufactured using premium raw materials and adhere to EN 10025-6:2004 standards. Each batch undergoes rigorous testing (tensile, impact, bending, and chemical composition analysis) to ensure consistency and performance.
2. Customization Capabilities: We offer S690QL in a wide range of thicknesses (6mm-200mm), widths, and lengths. Custom cutting, drilling, and surface treatment services are available to meet your specific project needs.
3. Global Supply Chain: With a well-established logistics network, we can deliver S690QL steel plates to any location worldwide-ensuring on-time delivery even for urgent orders.
4. Competitive Pricing & Transparency: By optimizing our production processes and eliminating middlemen, we provide competitive pricing without sacrificing quality. Our team offers transparent quotes and detailed product documentation.
5. Expert Technical Support: Our team of steel experts is available to provide technical advice, including material selection, welding guidelines, and application recommendations-helping you make informed decisions.
Get Your S690QL Quote From GNEE Steel Today
Whether you're working on a small-scale fabrication project or a large infrastructure development, S690QL high-yield structural steel from GNEE Steel is engineered to meet your most demanding requirements. We are committed to delivering high-quality products, reliable service, and competitive pricing to help you stay ahead of the competition.
Contact our sales team today to request a free quote for S690QL steel plates. Provide us with your specifications (thickness, width, length, quantity, and application), and we'll tailor a solution that fits your needs.
Trust GNEE Steel as your one-stop supplier for high-performance structural steel-your project deserves the best.
What is equivalent to S690QL steel?
Approximate equivalents
ASTM A514, EN 10149-2 Grade S700MC, AS/NZS 3579 Grade 700, AM 700, Bisalloy 80.
What grade is S690QL material?
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 the yield strength of S690 steel?
690 MPa
S690 Properties
Yield strength: typically 690 MPa, up to 960 MPa depending on the grade. Tensile strength: between 770 and 940 MPa, ensuring excellent load-bearing capacity.
What is the difference between S890QL and S690QL?
S890QL is a structural steel grade with an even greater yield strength than S690QL. The material serves as a great option for procurers who wish to promote high strength in a cost effective way.
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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.
| Grades Of Carbon and Low-alloy High-strength Steels Supplied By GNEE | |||||
| ASTM/ASME | ASTM A36/A36M | ASTM A36 | |||
| ASTM A283/A283M | ASTM A283 Grade A | ASTM A283 Grade B | ASTM A283 Grade C | ASTM A283 Grade D | |
| ASTM A514/A514M | ASTM A514 Grade A | ASTM A514 Grade B | ASTM A514 Grade C | ASTM A514 Grade E | |
| ASTM A514 Grade F | ASTM A514 Grade H | ASTM A514 Grade J | ASTM A514 Grade K | ||
| ASTM A514 Grade M | ASTM A514 Grade P | ASTM A514 Grade Q | ASTM A514 Grade R | ||
| ASTM A514 Grade S | ASTM A514 Grade T | ||||
| ASTM A572/A572M | ASTM A572 Grade 42 | ASTM A572 Grade 50 | ASTM A572 Grade 55 | ASTM A572 Grade 60 | |
| ASTM A572 Grade 65 | |||||
| ASTM A573/A573M | ASTM A573 Grade 58 | ASTM A573 Grade 65 | ASTM A573 Grade 70 | ||
| ASTM A588/A588M | ASTM A588 Grade A | ASTM A588 Grade B | ASTM A588 Grade C | ASTM A588 Grade K | |
| ASTM A633/A633M | ASTM A633 Grade A | ASTM A633 Grade C | ASTM A633 Grade D | ASTM A633 Grade E | |
| ASTM A656/A656M | ASTM A656 Grade 50 | ASTM A656 Grade 60 | ASTM A656 Grade 70 | ASTM A656 Grade 80 | |
| ASTM A709/A709M | ASTM A709 Grade 36 | ASTM A709 Grade 50 | ASTM A709 Grade 50S | ASTM A709 Grade 50W | |
| ASTM A709 Grade HPS 50W | ASTM A709 Grade HPS 70W | ASTM A709 Grade 100 | ASTM A709 Grade 100W | ||
| ASTM A709 Grade HPS 100W | |||||
| ASME SA36/SA36M | ASME SA36 | ||||
| ASME SA283/SA283M | ASME SA283 Grade A | ASME SA283 Grade B | ASME SA283 Grade C | ASME SA283 Grade D | |
| ASME SA514/SA514M | ASME SA514 Grade A | ASME SA514 Grade B | ASME SA514 Grade C | ASME SA514 Grade E | |
| ASME SA514 Grade F | ASME SA514 Grade H | ASME SA514 Grade J | ASME SA514 Grade K | ||
| ASME SA514 Grade M | ASME SA514 Grade P | ASME SA514 Grade Q | ASME SA514 Grade R | ||
| ASME SA514 Grade S | ASME SA514 Grade T | ||||
| ASME SA572/SA572M | ASME SA572 Grade 42 | ASME SA572 Grade 50 | ASME SA572 Grade 55 | ASME SA572 Grade 60 | |
| ASME SA572 Grade 65 | |||||
| ASME SA573/SA573M | ASME SA573 Grade 58 | ASME SA573 Grade 65 | ASME SA573 Grade 70 | ||
| ASME SA588/SA588M | ASME SA588 Grade A | ASME SA588 Grade B | ASME SA588 Grade C | ASME SA588 Grade K | |
| ASME SA633/SA633M | ASME SA633 Grade A | ASME SA633 Grade C | ASME SA633 Grade D | ASME SA633 Grade E | |
| ASME SA656/SA656M | ASME SA656 Grade 50 | ASME SA656 Grade 60 | ASME SA656 Grade 70 | ASME SA656 Grade 80 | |
| ASME SA709/SA709M | ASME SA709 Grade 36 | ASME SA709 Grade 50 | ASME SA709 Grade 50S | ASME SA709 Grade 50W | |
| ASME SA709 Grade HPS 50W | ASME SA709 Grade HPS 70W | ASME SA709 Grade 100 | ASME SA709 Grade 100W | ||
| ASME SA709 Grade HPS 100W | |||||
| EN10025 | EN10025-2 | EN10025-2 S235J0 | EN10025-2 S275J0 | EN10025-2 S355J0 | EN10025-2 S355K2 |
| EN10025-2 S235JR | EN10025-2 S275JR | EN10025-2 S355JR | EN10025-2 S420J0 | ||
| EN10025-2 S235J2 | EN10025-2 S275J2 | EN10025-2 S355J2 | |||
| EN10025-3 | EN10025-3 S275N | EN10025-3 S355N | EN10025-3 S420N | EN10025-3 S460N | |
| EN10025-3 S275NL | EN10025-3 S355NL | EN10025-3 S420NL | EN10025-3 S460NL | ||
| EN10025-4 | EN10025-4 S275M | EN10025-4 S355M | EN10025-4 S420M | EN10025-4 S460M | |
| EN10025-4 S275ML | EN10025-4 S355ML | EN10025-4 S420ML | EN10025-4 S460ML | ||
| EN10025-6 | EN10025-6 S460Q | EN10025-6 S460QL | EN10025-6 S460QL1 | EN10025-6 S500Q | |
| EN10025-6 S500QL | EN10025-6 S500QL1 | EN10025-6 S550Q | EN10025-6 S550QL | ||
| EN10025-6 S550QL1 | EN10025-6 S620Q | EN10025-6 S620QL | EN10025-6 S620QL1 | ||
| EN10025-6 S690Q | EN10025-6 S690QL | EN10025-6 S690Q1 | EN10025-6 S890Q | ||
| EN10025-6 S890QL | EN10025-6 S890QL1 | EN10025-6 S960Q | EN10025-6 S960QL | ||
| EN 10149 | EN 10149-2 | S315MC | S355MC | S420MC | S460MC |
| S500MC | S550MC | S600MC | S650MC | ||
| S700MC | S900MC | S960MC | |||
| JIS | JIS G3101 | JIS G3101 SS330 | JIS G3101 SS400 | JIS G3101 SS490 | JIS G3101 SS540 |
| JIS G3106 | JIS G3106 SM400A | JIS G3106 SM400B | JIS G3106 SM400C | JIS G3106 SM490A | |
| JIS G3106 SM490YA | JIS G3106 SM490B | JIS G3106 SM490YB | JIS G3106 SM490C | ||
| JIS G3106 SM520B | JIS G3106 SM520C | JIS G3106 SM570 | |||
| DIN | DIN 17100 | DIN17100 St52-3 | DIN17100 St37-2 | DIN17100 St37-3 | DIN17100 RSt37-2 |
| DIN17100 USt37-2 | |||||
| DIN 17102 | DIN17102 StE315 | DIN17102 EStE315 | DIN17102 TStE315 | DIN17102 WStE315 | |
| DIN17102 StE355 | DIN17102 EStE355 | DIN17102 TStE355 | DIN17102 WStE355 | ||
| DIN17102 StE380 | DIN17102 EStE380 | DIN17102 TStE380 | DIN17102 WStE380 | ||
| DIN17102 StE420 | DIN17102 EStE420 | DIN17102 TStE420 | DIN17102 WStE420 | ||
| DIN17102 StE460 | DIN17102 EStE460 | DIN17102 TStE460 | DIN17102 WStE460 | ||
| DIN17102 StE500 | DIN17102 EStE500 | DIN17102 TStE500 | DIN17102 WStE500 | ||
| DIN17102 EStE285 | |||||
| GB | GB/T700 | GB/T700 Q235A | GB/T700 Q235B | GB/T700 Q235C | GB/T700 Q235D |
| GB/T700 Q275 | |||||
| GB/T1591 | GB/T1591 Q345A | GB/T1591 Q390A | GB/T1591 Q420A | GB/T1591 Q420E | |
| GB/T1591 Q345B | GB/T1591 Q390B | GB/T1591 Q420B | GB/T1591 Q460C | ||
| GB/T1591 Q345C | GB/T1591 Q390C | GB/T1591 Q420C | GB/T1591 Q460D | ||
| GB/T1591 Q345D | GB/T1591 Q390D | GB/T1591 Q420D | GB/T1591 Q460E | ||
| GB/T1591 Q345E | GB/T1591 Q390E | ||||
| GB/T16270 | GB/T16270 Q550C | GB/T16270 Q550D | GB/T16270 Q550E | GB/T16270 Q550F | |
| GB/T16270 Q620C | GB/T16270 Q620D | GB/T16270 Q620E | GB/T16270 Q620F | ||
| GB/T16270 Q690C | GB/T16270 Q690D | GB/T16270 Q690E | GB/T16270 Q690F | ||
| GB/T16270 Q800C | GB/T16270 Q800D | GB/T16270 Q800E | GB/T16270 Q800F | ||
| GB/T16270 Q890C | GB/T16270 Q890D | GB/T16270 Q890E | GB/T16270 Q890F | ||
| GB/T16270 Q960C | GB/T16270 Q960D | GB/T16270 Q960E | GB/T16270 Q960F | ||
| GB/T16270 Q500 | |||||





