S690QL
S690QL Steel is an ultra high strength structural steel grade manufactured in accordance with EN 10025:6:2004. This steel is designed for demanding applications where superior strength and performance are critical. Produced using a precise quenching and tempering process, S690QL Plate offers an excellent combination of high yield strength, toughness, and weldability. This making it a preferred choice across industries such as construction, offshore, heavy transport, and lifting equipment.
As a leading S690QL supplier, we provide high quality S690QL steel that delivers consistent mechanical properties and reliable performance in challenging environments. The enhanced strength to weight ratio of this ultra high strength steel allows engineers and designers to create lighter, more efficient structures without compromising structural integrity. This results in reduced material usage, improved payload capacity, and greater energy efficiency, particularly in applications where weight savings are essential.
S690QL Plate offers good bending and fabrication performance. It allows flexible manufacturing while maintaining structural strength. Its low-temperature toughness ensures reliability in cold conditions. Additionally, this makes it suitable for harsh environments such as offshore platforms and heavy-duty structures. The steel also welds well when you follow correct procedures, which supports efficient fabrication and assembly.
Common applications for S690QL Steel include cranes, excavators, transport vehicles, bridges, and structural frameworks where high strength and durability are required. Its versatility and performance make it a reliable solution for modern engineering challenges that demand both strength and efficiency.
Grade Designation
- S = Structural Steel
- 690 = minimum yield strength (MPa)
- Q = Quenching & Tempering
- L = Low notch toughness testing temperature
Chemical Composition of S690QL
| % | |
|---|---|
| C | 0.20 |
| Si | 0.80 |
| Mn | 1.70 |
| P | 0.025 |
| S | 0.015 |
| N | 0.015 |
| B | 0.0050 |
| Cr | 1.50 |
| Cu | 0.50 |
| Mo | 0.70 |
| Nb | 0.06 |
| Ni | 2.0 |
| Ti | 0.05 |
| V | 0.12 |
| Zr | 0.15 |
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 | @ 0 Deg C | @ -20 Deg C | @ -40 Deg C | @ -60 Deg C |
|---|---|---|---|---|---|
| S690QL | Longitudinal | 50J | 40J | 30J | |
| Transverse | 35J | 30J | 27J |