Products Description
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.
The combination of good availability and pricing and high strength combined with ease of fabrication has made S690QL steel plate a popular grade for both mobile applications such as cranes and lifting equipment and fixed steel structures.
The high strength nature of this steel means that structures can be designed lighter and for mobile application this means increase in payload and operational efficiency.
Typical chemical composition of S690QL % Max
| Typical chemical composition of S690QL % Max | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
C |
SI |
Mn |
P |
S |
N |
B | Cr | Cu | Mo | Nb | Ni | Ti | V | Zr |
| 0.2 | 0.80 | 1.70 | 0.025 | 0.015 | 0.015 | 0.005 | 1.50 | 0.50 | 0.70 | 0.06 | 2.0 | 0.05 | 0.12 | 0.15 |
Mechanical Properties of S690QL
| Mechanical Properties of S690QL | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Designation | Mechanical Properties (ambient temperature) | ||||||||||
| Steel Name | Steel Number | Min. Yield Strength ReH MPa | Tensile Strength Rm MPa | Min. & elongation after fracture | |||||||
| Nominal thickness (mm) | Nominal thickness (mm) | ||||||||||
| >3 <50 | >50 <100 | >100 <150 | >3 <50 | >50 <100 | >100 <150 | ||||||
| S690QL | 1.8931 | 690 | 650 | 630 | 770/940 | 760/930 | 710/900 | 14 | |||
| V notch impact testing | |||||
|---|---|---|---|---|---|
|
Grade |
Sample Orientation |
at 0°C |
at -20°C |
at -40°C |
at -60°C |
| S690QL | Longitudinal | 50J | 40J | 30J | |
| S690QL | Transverse | 35J | 30J | 27J | |
Key Features of S690QL Ultra High Strength Steel
Exceptional Strength
High Yield Strength: The most notable feature of S690QL is its high yield strength of 690 MPa. This allows for the creation of lighter and thinner structures without compromising on strength or stability.
Enhanced Toughness: S690QL exhibits excellent toughness, even at low temperatures. This makes it suitable for use in harsh environments where standard steels might fail.
Superior Weldability
Despite its high strength, S690QL maintains good weldability. This is a crucial feature for structural applications, as it allows for the creation of complex structures without the risk of brittle weld joints.
High Ductility
Formability: The steel's high ductility ensures that it can be easily formed and fabricated into various shapes and sizes, meeting diverse engineering requirements.
Resistance to Wear and Tear
S690QL is known for its excellent resistance to abrasion and impact. This makes it ideal for applications where wear and tear are significant concerns, such as mining equipment, heavy machinery, and transportation vehicles.
Applications of S690QL Ultra High Strength Steel
Construction and Infrastructure
In the construction industry, S690QL is used for building structures that require high load-bearing capacity and resilience, such as bridges, high-rise buildings, and stadiums. Its ability to withstand heavy loads without compromising structural integrity makes it an invaluable material for infrastructure projects.
Heavy Machinery and Equipment
The manufacturing of heavy machinery, including cranes, earth-moving equipment, and mining machinery, benefits from the high strength and durability of S690QL. It ensures that these machines can operate under extreme conditions and carry heavy loads efficiently.
Transportation and Automotive Industry
In the transportation sector, S690QL is used to produce components for heavy-duty trucks, trailers, and other vehicles that require enhanced strength and durability. Its use leads to safer, more reliable vehicles capable of handling demanding tasks.
Partnering with AJ Marshall for Success
S690QL ultra high strength steel stands out as a material of choice for numerous high-performance applications due to its exceptional strength, toughness, weldability, and resistance to wear and tear.
Its advantages extend beyond just performance, offering cost savings and extended service life, making it an excellent investment for any project requiring superior material properties. Whether in construction, heavy machinery, or transportation, S690QL provides the reliability and efficiency needed to meet today's engineering challenges.
