Strenx High-Strength Steel
SSAB's high-strength structural steel brand. The Strenx 700 E/F grade is the EN 10025-6 S690QL equivalent; it stands out with guaranteed flatness, narrow tolerances and superior weldability. Strenx 700E 8 – 120 mm is available from our stock.
What Is Strenx?
Strenx is the high-strength structural steel brand of the Swedish steel manufacturer SSAB. Its name comes from the English word "strength" and it is produced at SSAB's facilities in Oxelösund (Sweden) and Raahe (Finland). Strenx is one of the world's most preferred high-strength steel brands in engineering applications that require weight optimization and high strength.
What makes Strenx different is not only its high yield strength. SSAB brings together all Strenx grades under a single guarantee umbrella: properties such as yield strength, weldability, cold forming and flatness are all guaranteed by a single manufacturer. This means predictable performance that does not vary from project to project.
Single Guarantee
Strength, flatness, welding and forming properties are guaranteed under a single manufacturer; this provides consistent results.
Narrow Tolerance
Tighter thickness and dimensional tolerances than the standards allow; every plate arrives close to the target dimension.
Superior Flatness & Welding
Guaranteed flatness makes laser cutting easier; the low carbon equivalent reduces welding time and the need for preheating.
The Strenx series is offered in a wide yield strength range from approximately 600 MPa to 1300 MPa. Each grade is optimized for a specific application profile; for example Strenx 700E is developed for heavy structures and crane applications, Strenx 700MC for cold forming in thin sheet, and the ultra-high 960/1100 grades for maximum weight savings.
Strenx Product Family
High-strength steel grades suited to every need, from 600 MPa to 1300 MPa.
| Strenx Grade | Yield Strength (typical) | Standard | Typical Use |
|---|---|---|---|
| Strenx 700 E/F | ≥ 690 MPa | EN 10025-6 (S690QL/QL1 equivalent) | Crane boom, bridge, heavy structural construction |
| Strenx 700 MC | ≥ 700 MPa | EN 10149-2 (S700MC equivalent) | Thin sheet, trailer chassis, cold forming |
| Strenx 960 | ≥ 960 MPa | Quenched + tempered (Q+T) | Ultra-high strength, heavy cranes, mining equipment |
| Strenx 1100 | ≥ 1100 MPa | Quenched + tempered (Q+T) | Maximum weight savings, special machinery |
Note: Values are typical/reference and vary depending on thickness and sub-grade (E/F). The 700 E/F distinction indicates the impact test temperature (E: −40°C, F: −60°C). Strenx 700E is the SSAB counterpart of the EN 10025-6 S690QL grade.
Strenx Advantages
The four key properties that set Strenx apart from standard EN grades.
Guaranteed Flatness
SSAB guarantees flatter plate than standard tolerances. Flat sheet saves time in laser cutting, assembly and welding, and reduces distortion.
Narrow Thickness Tolerance
Production close to the target thickness makes part weight predictable and increases confidence in designing with the nominal thickness.
Superior Cold Forming
Thanks to a clean microstructure and narrow tolerances, it allows lower bending radii; it makes crack-free bending and complex form making easier.
Low-Temperature Toughness
The E/F sub-grades offer guaranteed impact toughness at −40°C / −60°C; they ensure safe operation for cold-climate and offshore applications.
The Difference Between Strenx and a Standard EN Grade
S690QL or S700MC are each a standard grade designation (minimum requirements defined in EN norms). Strenx, on the other hand, is a brand that produces these grades. In other words, Strenx 700E meets the S690QL standard — but SSAB commits to better flatness, narrower tolerances and more consistent weldability than the minimums that this standard allows.
In short: the standard defines the acceptable lower limit; the brand (Strenx) offers additional guarantees and batch consistency above this limit. In design calculations, standard grade (S690QL) values are used; in procurement, however, a brand such as Strenx means fewer surprises in the field.
Strenx Stock at Sacdan Adam
As Sacdan Adam, we keep the most in-demand Strenx 700E grade continuously in stock and offer delivery including cutting and bending:
Thickness Range
Strenx 700E · 8 – 120 mm
8 · 10 · 12 · 15 · 20 · 25 · 30 · 40 · 50 · 60 · 80 · 100 · 120 mm
Grade
- Strenx 700 E — SSAB / Sweden
- EN 10025-6 · S690QL equivalent
- Yield ≥690 MPa, impact −40°C
Certificates
- EN 10204 — 3.1 Inspection Certificate
- Mill test certificate
- 3.2 certificate on request
Additional Services
- Laser / plasma / oxy-fuel cutting
- Press brake bending
- Nationwide shipping across Turkey
Frequently Asked Questions About Strenx
Are Strenx and S690QL the same?
Strenx 700 E/F is the SSAB brand that meets the S690QL grade in the EN 10025-6 standard. In other words, in practice Strenx 700E is the S690QL equivalent:
- S690QL: a standard grade designation (minimum requirements defined in the EN norm).
- Strenx: the brand (SSAB) that produces this grade.
Strenx 700E can be used in a project with an S690QL specification; in addition, SSAB provides narrower tolerances and flatness assurance at the brand level.
What is Strenx 700E?
Strenx 700E is SSAB's quenched and tempered (Q+T) high-strength steel grade with a minimum yield strength of 690 MPa. It meets the EN 10025-6 S690QL grade.
Its typical mechanical values: tensile strength 770–940 MPa, elongation at break ≥14%, minimum 27 J impact energy at −40°C, hardness reference 235–280 HBW. It is widely used in crane booms, bridges and heavy structural construction.
Why is Strenx preferred?
Strenx offers four key advantages beyond the minimums provided by a standard EN grade:
- Guaranteed flatness: saves time in laser cutting and assembly.
- Narrow thickness tolerance: predictable weight and safe design.
- Superior cold forming: lower bending radius, crack-free bending.
- Low-temperature toughness: safe operation for cold climates and offshore.
Together, these properties enable lighter, more reliable and easier-to-manufacture structures.
Is Strenx weldable?
Yes. Thanks to the low carbon equivalent of Strenx grades, it offers good weldability. Nevertheless, due to the high-strength class, a few rules must be observed:
- Method: low-hydrogen MIG/MAG, TIG or submerged arc welding.
- Preheating: thickness-dependent, typically in the 100–200°C range.
- Interpass temperature: under control, generally ≤250°C.
- Filler material: matching or slightly undermatching consumables are selected.
For a detailed procedure, see our Weldability Guide page.
Strenx 700E Ex-Stock, Ready for Delivery
Get Strenx 700E plates between 8 mm – 120 mm, 3.1 certified, delivered including cutting and bending. Let's choose the right grade for your project together.