Description
S690QL is a high yield strength structural steel grade produced in accordance with EN 10025-6. This steel is designed to provide an excellent combination of high strength, toughness, abrasion resistance and weldability. Material/steel number: 1.8928
Product designation
S - Structural steel
690 - Minimum yield strength MPa
Q - Quenched and tempered delivery condition
L - Impact energy tested at -40°C
Typical applications
S690QL is very high strength structural steel and can result in greater load-carrying capacities and lighter structures when used in place of conventional structural steels. Uses include earthmoving equipment, dump trucks, mobile cranes, drilling rigs, high-speed fans, and bridges.
S690QL high yield structural steel is used in a variety of sectors including:
- Heavy transportation
- Machine building
- Steel constructions
- Lifting equipment
S690QL - Chemical Composition
The chemical composition of S690QL is provided in the table below.
S690QL - Mechanical Properties
The mechanical properties of S690QL is outlined in the table below.
S690QL - V Notch Impact Testing
The V Notch impact testing details are given in the table below.
Note
Chemical composition: Ladle/ product analysis in %max - Mechanical properties: At ambient temperature - Typical hardness 235 - 295 BHN: For information purpose only, it is not a requirement for structural steels and therefore not tested - Recommended inside bend radii: The values are applicable for bend angles ≤90° - Dimensions and tolerance in accordance with EN 10029
Approximate equivalents
S690QL steel plate has approximate material equivalents across different regional standards:
ASTM A514 (U.S. standard): A high-strength quenched and tempered alloy steel plate, commonly used in construction machinery, pressure vessels, and other heavy-duty applications.
EN 1049-2 Grade S700MC (EU standard): A hot-rolled high-strength structural steel plate, optimized for cold-forming performance.
AS/NZS 3579 Grade 700 (Australia/New Zealand standard): A high-strength steel designed for welded structural components.
It also corresponds to grades like AM 700 and Bisalloy 80 (Bisalloy 80 is a high-strength quenched and tempered steel produced by Australia's Bisalloy Steels).
ASTM A514, EN 1049-2 Grade S700MC, AS/NZS 3579 Grade 700, AM 700, Bisalloy 80.
Fabrication
S690QL steel plate can be readily formed or bent at room temperature if adequate power is available and proper procedures are used.
Generally, the power required to form S690QL will be three times that required for carbon structural steel.
Hot forming
Avoid exceeding 550°C because the initial tempering can be altered so that the mechanical properties are affected.
This is because S690QL is a quenched and tempered steel; its mechanical properties (e.g., strength, toughness) are defined by its specific tempering process. Excessively high temperatures during hot forming can alter the original tempering state, which in turn compromises the material's intended mechanical performance.
Standard Stock List
12000 × 2500 × 6 / 8 / 10 / 12 / 16 / 20 / 25 / 30 mm
12000 × 2500 × 40 / 50 / 60 / 65 / 70 / 75 mm
6000 × 2500 × 80 / 90 / 100 / 125 / 150 mm
Is N690 a high end steel?
N690 Cobalt Stainless Steel, made by Böhler-Uddeholm, is a high-end stainless steel that was developed specifically for knife making.
Is N690 better than 440C?
N690 is sometimes compared to 440C steel. Many knife makers however do not believe that 440C is the best steel for comparison to N690. N690 is a much better steel and it is very similar to the VG10. N690 steel is so good for making knifes that many prominent knife manufacturers use only N690 steel.
What knife do navy SEALs really use?
While there are civilian versions of this blade available, the true Ontario Mk3 is a standard-issue knife made specially for the United States Navy, which includes the SEALs. It's a solid tactical fixed blade, if you can find one!
What is the Holy Trinity of knives?
The holy trinity of knives: Chef, Santoku, and Utility. From delicate slices to heavy-duty prep, they've got you covered.
What is N690 equivalent to?
440C
Bohler N690, the equivalent of 440F, which is 440C with a bit of Cobalt. Some compare it in performance to VG-10. It is imported from Austria. Bohler N695, is the equivalent of 440C.
What is the strongest sharpest steel?
1. ZDP-189 Steel. ZDP-189 is a steel with a particularly high carbon and chromium content, which makes a knife blade made of this steel very hard. According to knife manufacturers, blades made of ZDP -189 can have a sharpness of about 64 HRC and sometimes even 67 HRC.