Looking for superior strength steel plates that don’t compromise on weldability or fabrication ease?
EN 10025-6 S690Q plates are engineered to deliver exceptional yield strength (≥690 MPa), making them a top-tier choice for critical load-bearing components in construction, lifting, and structural applications.
At Champak Industries, we supply certified, export-ready S690Q structural steel plates that meet global quality benchmarks—helping you design safer, lighter, and more efficient heavy-duty structures.
What is EN 10025-6 S690Q and Why Is It Important for Structural Design?
EN 10025-6 S690Q is a quenched and tempered high-yield structural steel plate defined by the European standard EN 10025-6. The “Q” denotes high notch toughness, making it ideal for applications where extreme load-bearing strength and safety are essential.
Its low carbon equivalent and optimized microstructure ensure:
- High strength without brittleness
- Good weldability for complex structures
- Dimensional consistency for precision fabrication
This makes it suitable for critical infrastructure, lifting equipment, cranes, and structural frames across sectors like construction, mining, transport, and offshore.
Key Applications of S690Q Plates in Heavy Load-Bearing Projects
EN 10025-6 S690Q plates are widely used in industries where load capacity, reduced structural weight, and durability are non-negotiable. Some application examples include:
- Bridge sections and girders – enabling longer spans with reduced support
- Hydraulic and mobile cranes – delivering strength-to-weight efficiency
- High-rise buildings and structural frames – enhancing load resistance
- Offshore platforms and wind turbines – demanding fatigue-resistant performance
- Mining and earth-moving equipment – withstanding high mechanical stress
Mechanical Properties and Structural Strength of EN 10025-6 S690Q
| Property | Typical Value |
|---|---|
| Yield Strength | ≥ 690 MPa |
| Tensile Strength | 770–940 MPa |
| Elongation at Break | ~14% – 17% |
| Impact Energy (Charpy V) | ≥ 30J @ -20°C (S690Q) |
| Hardness | 200–270 HB |
| Plate Thickness Range | 6 mm to 120 mm |
| Formability | Good (for high-strength steel) |
| Weldability | Excellent with low preheat required |
These properties make S690Q a high-performance material suitable for demanding structural designs where traditional steel grades fall short in performance or efficiency.
Technical Standards, Grades & Compliance for EN 10025-6 S690Q
The EN 10025-6 standard is widely recognized for defining quenching and tempering conditions for high-yield steel grades. S690Q adheres to:
- EN 10025-6:2004 + A1:2009 standard
- Supplied with EN 10204 3.1 / 3.2 certification
- Compliant with CE Marking, NACE MR0175 (on request)
- Optional: DNV, ABS, or LR approval for offshore applications
Equivalent International Grades:
| Standard | Equivalent Grade |
|---|---|
| ASTM | A514 Gr F (partial) |
| DIN | WELDOX 700, S690Q |
| JIS | SM570 (comparable) |
| BIS (India) | YST 355+ (approx.) |
Size Availability, Thickness Range & Custom Cutting
At Champak Industries, we offer wide dimensional flexibility for diverse project needs:
- Thickness: 6 mm to 120 mm
- Width: 1500 mm to 3200 mm
- Length: Up to 12,000 mm
- Surface Finish: Mill, Shot Blasted, Primer Coated
- Cut-to-Size & CNC Profile Cutting available
- Plasma / Laser Cutting for Precision Jobs
Quenched & Tempered Strength with Weldability
The superior strength of S690Q is achieved through quenching (hardening) and tempering (toughening)—yielding plates with:
- High impact resistance even at sub-zero temperatures
- Excellent mechanical balance between strength and toughness
- Controlled carbon equivalent for superior weldability without brittle zones
S690Q performs reliably in extreme fabrication environments, including high-frequency welding, bending, and machining operations.
Fabrication Guidance & Welding Advice for Engineers
While S690Q is strong, it remains weldable and formable with minimal precautions:
- Preheating required for thickness >40mm
- Low hydrogen electrodes recommended
- Suggested interpass temperature: <150°C
- Suitable for MAG, SAW, TIG, and MMA welding
Machining Tip:
Use carbide-tipped tools and slower feed speeds during drilling or milling to retain edge sharpness and plate finish.
🧑🏭 Our team also offers fabrication advisory support to engineers and OEMs – Contact Us for technical queries.
Why Engineers and OEMs Choose Champak Industries for S690Q Plates
Champak Industries isn’t just a supplier—we are a project partner for your toughest steel challenges. Our S690Q offerings come with:
✅ Mill Test Reports (MTRs)
✅ 3.1/3.2 Inspection Certificates
✅ Export-Grade Bundling & Sea-Worthy Packing
✅ In-stock availability of standard sizes
✅ Cut-to-length and profile shapes
✅ Technical guidance and material traceability
S690QL1, S890Q, & Other High Yield Plates
We also stock and supply other EN 10025-6 grades that cater to varied stress and design conditions:
- S690QL1 – Improved impact resistance at -60°C
- S890Q – Extra high yield strength for lightweight design
- S960QL / WELDOX 900 – Ultra-high strength, low weight
- ASTM A514 / A517 – Quenched & tempered US-grade alternatives
Global Export Reach & Packaging for S690Q Plates
Champak Industries is a trusted exporter of EN 10025-6 S690Q plates to over 50 countries. Our high-yield steel plates are packed with international compliance in mind:
🌍 Top Export Destinations:
- UAE, Saudi Arabia, Oman, Qatar
- South Africa, Nigeria, Kenya
- Vietnam, Indonesia, Malaysia
- Germany, Poland, Italy
📦 Export-Ready Packaging:
- Waterproof wrapping + anti-rust coating
- Edge protection + strapped bundles
- Container & break-bulk shipment ready
- Third-party inspection support (Lloyds, SGS)
Choosing the Right S690Q Plate for Your Project
When selecting S690Q high-yield steel plates, buyers should evaluate:
☑️ Required yield strength and design stress
☑️ Thickness tolerance and dimensional specs
☑️ Weldability (CEV, preheat) for fabrication
☑️ Charpy Impact values at service temp
☑️ Certifications and inspection scope
☑️ Lead time and logistics to site
Not sure which plate suits your load-bearing application? Talk to our experts →
Certifications, Approvals & Test Reports
Every batch of EN 10025-6 S690Q plates from Champak Industries includes:
📄 EN 10204 Type 3.1 / 3.2 Mill Test Certificates
📊 Ultrasonic Testing (UT) reports
🧪 Charpy V-Notch Test @ -20°C / -40°C
✅ CE marking as per EN standard
🔧 Optional: NACE MR0103, PWHT compatibility
For special testing (Z-direction, drop weight, magnetic particle), we offer lab-backed solutions.
Request a Quote, Samples or Technical Datasheet
Looking for custom cut profiles, bulk procurement, or a quote with delivery timeline?
📥 Reach out now for:
- Project-based pricing
- Technical datasheets (PDF format)
- MOQ and availability
- Application-specific guidance
🔗 📞 Request Quote or Datasheet
✉️ Email: [email protected]
FAQs
Q1. What is EN 10025-6 S690Q steel plate used for?
Heavy-duty structures like bridges, cranes, mining trucks, and pressure vessels.
Q2. What is the yield strength of S690Q?
Minimum yield strength is 690 MPa.
Q3. Is S690Q weldable?
Yes, it has good weldability with proper preheat and low hydrogen electrodes.
Q4. What does the ‘Q’ in S690Q stand for?
‘Q’ refers to quenched and tempered condition of the plate.
Q5. What is the difference between S690Q and S690QL1?
QL1 has higher notch impact resistance at lower temperatures (up to -60°C).
Q6. Can S690Q be used in offshore structures?
Yes, with suitable approval (like DNV or ABS), it is used in offshore and marine applications.
Q7. Is S690Q available in India?
Yes, we stock and supply it across India and also export worldwide.
Q8. What is the maximum thickness of S690Q plates?
Up to 120 mm, depending on customer requirements.
Q9. What testing is provided with S690Q plates?
UT, CVN, tensile, chemical, and dimensional test reports are provided.
Q10. Does S690Q require preheating before welding?
Yes, especially for thicker plates (>40 mm) to avoid cracking.
Q11. What is the hardness of S690Q steel?
Typically in the range of 200–250 BHN depending on heat treatment.
Q12. Is Champak Industries a stockist or manufacturer?
We are a stockist, processor, and exporter with mill-tied supplies.
Q13. Can you supply custom profile cut plates?
Yes, we offer CNC profile cutting and shape-ready solutions.
Q14. Is there any MOQ for export orders?
We cater to both small and bulk orders. MOQ depends on destination and plate size.
Q15. Where can I get the S690Q datasheet?
Just contact us here or email [email protected] to request one.
