EN10025-6 S690QL1 High Tensile Alloy Steel Sheet
Standard:ASTM JIS GB EN DIN
Tolerance:±1%
Note:Customized size available
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Gnee Steel (Tianjin) Co., Ltd. is one of the most professional en10025-6 s690ql1 high tensile alloy steel sheet manufacturers and suppliers in China. Welcome to wholesale customized en10025-6 s690ql1 high tensile alloy steel sheet at competitive price from our factory. Good service and quality products are available.
S690QL1 High Tensile Alloy Steel Sheet is quenched & tempered fine-grain structural steel to EN 10025-6. As the upgraded variant of S690Q and S690QL, it delivers minimum 690MPa yield strength, reliable weldability and guaranteed -60°C impact toughness.
This high tensile alloy steel plate minimizes structural weight while sustaining heavy dynamic loads. It is widely adopted for mobile cranes, cold-region mining machinery, offshore frames and low-temperature bridge components.
S690QL1 High Structural Steel Plate of Specification
- Standard: The standard governing S690QL1 steel is often EN 10026-6.
- Grade: S690QL1 (also known as S1100Q).
- Thickness: Available in various thicknesses, typically ranging from 6 mm to 120 mm.
- Width: Commonly available widths are from 1200 mm to 5000 mm.
- Length: Lengths usually range from 1000 mm to 15000 mm.
- Heat Treatment: Quenched and Tempered (Q+T).
S690QL1 high strength plate Key Properties and Characteristics
S690QL1 steels are engineered for demanding applications. You can rely on them for consistent strength and performance under extreme conditions.
Main Characteristics:
- High yield strength (minimum 690 MPa)
- Excellent toughness and ductility
- Superior impact resistance at low temperatures
- Good weldability and formability
- Consistent thickness and dimensional accuracy
- Enhanced fatigue resistance
- Designed for weight reduction in structural applications
These properties make S690QL1 the preferred choice for high-performance structures where both strength and weight efficiency matter.
Forming of S690QL1 HSLA steel
Bending and forming is possible using suitably powerful equipment. When bending transversal to the rolling direction it is recommended to form to a maximum of 2 x thickness. For longitudunal to the rolling direction a maximum of 3 x thickness is recommended. S690QL1 steel plate is not ideally suited for hot forming over 600°C. Forming at over this temperature can have an effect on the mechanical properties of the steel and re hardening and tempering may be required.
Welding of S690QL1 high strength steel
Two matching strategies are adopted in global engineering projects:
Equal strength matching: Low hydrogen filler metal with minimum yield strength 690 MPa (primary option).
Undermatching: 620 MPa grade consumables for low-temperature dynamic structures to reduce residual stress. Avoid ordinary carbon steel welding rods.
Preheat & Interpass Temperature
Plate ≤12 mm: Min. preheat 50 ℃, max interpass 200 ℃
12–25 mm: Min. preheat 100 ℃, max interpass 200 ℃
25–50 mm: Min. preheat 125 ℃, max interpass 200 ℃
Over 50mm / highly restrained joints: Min. preheat 150 ℃ Increase preheat temperature by 25~50 ℃ under cold weather or damp working conditions.
Recommended Welding Processes
SMAW: E8515-G / E8516-G low hydrogen electrodes (bake at 350–400℃)
MAG / GMAW: ER85S-G wire, shielding gas: 80% Ar +20% CO₂
SAW: Low-hydrogen agglomerated flux, fully dried before use. Controlled heat input: 0.6 ~ 1.8 kJ/mm
Post-Weld Treatment
Post weld heat treatment (PWHT) between 500~650℃ is forbidden, as it will degrade base metal strength and low-temperature toughness. For thick and highly constrained welds: Hold 200–250 ℃ for 2–4 hours for hydrogen removal, then cool down slowly.
Need tailored welding recommendations for your S690QL1 plate thickness and joint design? Contact GNEE STEEL technical team for professional grade selection and processing suggestions.
Chemical Composition of S690QL1 highest strength steel
| Element | Symbol | Percentage (%) |
| Carbon | C | ≤ 0.20 |
| Silicon | Si | ≤ 0.80 |
| Manganese | Mn | ≤ 1.70 |
| Phosphorus | P | ≤ 0.025 |
| Sulfur | S | ≤ 0.010 |
| Chromium | Cr | ≤ 1.50 |
| Nickel | Ni | ≤ 2.00 |
| Molybdenum | Mo | ≤ 0.70 |
| Boron | B | ≤ 0.005 |
| Copper (optional) | Cu | ≤ 0.50 |
S690QL vs S690QL1 steel：Chemical Composition and Impact Properties Comparison
| Property | S690QL |
S690QL1 |
| Yield Strength (MPa) | ≥ 690 | ≥ 690 |
| Tensile Strength (MPa) | 770 – 940 | 770 – 940 |
| Impact Test Temperature | -40°C | -60°C |
| Elongation (%) | 14 | 14 |
Key Insight：
Both grades exhibit excellent mechanical strength with outstanding toughness. The difference lies in the impact testing temperature, where S690QL1 performs better in sub-zero environments.
Typical Impact Properties
| Steel Name | Sample Direction | 0℃ | -20℃ | -40℃ | -60℃ |
|---|---|---|---|---|---|
| S690QL |
Longitudinal Transverse |
50 J 35 J |
40 J 30 J |
30 J 27 J |
- |
| S690QL1 |
Longitudinal Transverse |
60 J 40 J |
50 J 35 J |
40 J 30 J |
30 J 27 J |
Longitudinal = parallel to rolling direction; Transverse = perpendicular to rolling direction.
Applications of S690QL1 highest strength steel
S690QL1 steels are ideal for high-load, weight-sensitive, and safety-critical structures. Their strength-to-weight ratio allows for lighter, more efficient designs without compromising performance.
Common Applications Include:
- Bridges and infrastructure projects
- Offshore platforms and marine structures
- Heavy construction and mining equipment
- Cranes, booms, and lifting machinery
- Truck chassis and trailers
- Material handling systems
Advantages of Using S690QL1 Steel
Weight Reduction
S690QL1 high tensile alloy steel plate delivers a minimum 690 MPa yield strength, enabling designers to adopt thinner plate gauges compared to mild steel or lower-grade S690Q steel. Structural dead weight can drop by 20–35% while maintaining required structural strength limits.
High Load-Bearing Capacity
As upgraded low-temperature variant of S690QL, S690QL1 withstands static loads plus frequent dynamic impact forces. It satisfies load requirements for mobile machinery and heavy lifting equipment without overengineering component cross-sections.
Improved Fatigue Life
Fine-grained quenched & tempered S690QL1 steel features stable microstructure. It maintains performance under repeated cyclic loading on crane booms and chassis parts, effectively delaying crack initiation vs ordinary high strength steel grades.
Enhanced Durability
S690QL1 steel guarantees Charpy V-notch impact toughness down to -60°C. It retains sufficient ductility in frigid mining, northern construction and offshore sites, lowering risk of brittle fracture under low-temperature working conditions.
Cost Efficiency
Lighter structural sections from S690QL1 cut raw material consumption. Reduced component weight decreases fuel expenditure during transport and simplifies welding, cutting and overall component fabrication expenses for end manufacturers.
Consistent Quality
S690QL1 steel sheet is fully produced and inspected per EN 10025-6 specifications. All batches come with official mill test certificates, ensuring uniform mechanical properties and traceability for global engineering tender projects.
Weight Table for S690QL1 High strength low alloy steel plate
| Plate Thickness (mm) | Theoretical Weight (kg/m²) |
|---|---|
| 6 | 47.10 |
| 8 | 62.80 |
| 10 | 78.50 |
| 12 | 94.20 |
| 14 | 109.90 |
| 16 | 125.60 |
| 20 | 157.00 |
| 25 | 196.25 |
| 30 | 235.50 |
| 40 | 314.00 |
| 50 | 392.50 |
| 60 | 471.00 |
| 80 | 628.00 |
| 100 | 785.00 |
| 120 | 942.00 |
Extended Tips: How to Calculate the Total Weight of Steel Plates?
Weight(kg) = Thickness(mm) × Width(m) × Length(m) × 7.85
Calculation Example (S690QL1 Steel Plate)
Calculation steps: Thickness=30 mm｜Width=1.75 m｜Length=8.00 m
30 × 1.75 × 8.00 × 7.85 = 3297 kg (3.297 metric tons)
PS：Theoretical weight is calculated based on standard density 7.85 g/cm³. Actual density of S690QL1 high tensile steel ranges between 7.86–7.87 g/cm³. Minor weight deviation shall be subject to actual weighing or mill certificate.
30×1750×8000 S690QL1 Marked Steel Plate Actual Photo
We provide precise S690QL1 steel weight calculation, customized cutting and 100% MTC-certified products. Submit your dimensions to get an accurate shipping and costing report.
Why Select GNEE STEEL as Your One-Stop Steel Supplier?
Complete High Tensile Steel Inventory
GNEE STEEL maintains spot stock of S690QL1, S690QL and other EN 10025-6 high strength alloy plates covering 6–120mm thickness. We support mixed-grade consolidation orders, removing the need for buyers to source multiple vendors and shorten procurement lead time effectively.
In-House Precision Processing Service
We provide CNC flame cutting, plasma cutting and edge machining for S690QL1 steel plate. Tolerance can be controlled within ±0.8mm, directly supplying finished blanks. This reduces your internal machining workload and cuts overall component manufacturing expenditure by 10–22%.
Strict Standardized Quality Control
All batches of S690QL1 high tensile steel are tested for yield strength and low-temperature Charpy impact toughness. We supply EN 10204 3.1 mill certificates; SGS, BV or TUV third-party inspection is available to satisfy international engineering tender requirements.
Professional High-Strength Steel Technical Support
Our engineering team owns rich experience with S690QL / S690QL1 application. We offer free guidance on welding procedures, preheating parameters and grade selection, helping you avoid brittle fracture risks for cold-region machinery and lifting equipment structures.
Flexible Order Quantities & Stable Delivery
We accept trial orders starting from 1 ton alongside bulk shipments over 25 tons. Our on-time delivery rate reaches 97% for export orders, with mature FOB/CFR/CIF solutions to Europe, Middle East and Oceania markets for high tensile alloy steel sheet.
Long-Term Mill Partnership for Stable Pricing
Direct cooperation with qualified domestic steel mills allows us to offer transparent, competitive prices for EN 10025-6 grades including S690QL1. We assist long-term clients with price locking to hedge volatility in the global steel raw material market.
Packaging & Transportation
Standard Multi-Layer Anti-Corrosion Packing
S690QL1 steel plate adopts multi-layer export packing. Inner VCI anti-rust film blocks moisture; waterproof woven cloth serves as outer shield. ISPM 15 certified wooden dunnage separates plates to avoid surface scratches during loading and transit
Bundle Reinforcement & Marking Specification
Each S690QL1 bundle is fastened with high-tensile steel strapping and corner guards to prevent loosening. Original steel marking is preserved, and shipping labels clearly print grade, dimension, weight and EN 10025-6 standard for easy customs clearance.
Containerized Sea Freight (Primary Solution)
Sea freight via standard containers or flat racks is the mainstream choice for bulk S690QL1 orders. Plates are fixed with supporting timbers to stop shifting. This transport mode balances cost and safety for Europe, Middle East and Oceania engineering buyers.
Contact us now for the latest price and free samples!
If you have special requirements for S690QL1 packing mode or transport terms (FOB/CFR/CIF), contact GNEE STEEL team to get tailored logistics solution and estimated transit schedule.
FAQ:
What is the ASTM equivalent of EN 10025-6 S690QL?
ASTM A709 Grade 100 is commonly regarded as the closest ASTM equivalent to EN 10025-6 S690QL in terms of strength level.
What is EN 10025-6 material?
EN 10025-6 S690Q Supplier. EN 10025-6 S690Q Plates are water-quenched, high-strength, fine-grained steels that have excellent toughness at low temperatures and offer excellent corrosion resistance, rugged steel bodies that do not crack or dent, superior payload, etc.
What is the difference between S700mc and S690QL?
S700MC is a thermomechanically rolled steel with superior formability, while S690QL is a quenched and tempered steel offering exceptional impact toughness at low temperatures. S700MC is generally used for cold-formed components like truck chassis and cranes, whereas S690QL is ideal for heavy-duty, load-bearing structural frameworks.
What is the effective use of high strength S690 steel in construction?
The high strength S690 steels have an excellent strength-to-self-weight ratio, and they are highly efficient to be used in heavily loaded structures. Typical applications include piles and columns in buildings and supporting members in bridges.
What standard covers S690QL and S690QL1 steel?
S690QL and S690QL1 steels are specified under the European standard EN 10025-6, which defines high-yield strength structural steels supplied in quenched and tempered condition.
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