S690ql1 Steel Plate Manufacturers
S690QL1 is a high-strength, quenched and tempered (Q&T) structural steel plate (EN 10025-6) known for its minimum yield strength of 690 MPa and excellent low-temperature toughness (tested to -60°C), making it ideal for demanding heavy-duty applications in construction, machinery, and transport, offering superior strength-to-weight, weldability, and performance in extreme conditions.
S690QL1 is a high-strength, fine-grained structural steel (EN 10025-6 standard) known for its excellent yield strength (minimum 690 MPa), toughness, and good weldability, achieved through a quench and temper (Q&T) heat treatment, with 'L1' indicating enhanced low-temperature impact toughness down to -60°C, making it ideal for heavy-duty construction, machinery (cranes, excavators), and infrastructure requiring high strength-to-weight ratios and durability in demanding conditions.
Key Characteristics
High Strength: Minimum yield strength of 690 MPa, with tensile strength up to 940 MPa, allowing for lighter, stronger designs.
Quenched & Tempered (Q&T): Heat treatment process provides high strength and toughness.
Toughness: Excellent impact properties, especially at low temperatures (down to -60°C for S690QL1).
Weldability: Good welding and cold-forming properties, suitable for complex fabrications.
Fine-Grained: Produces maximum performance in demanding environments.
Common Applications
Construction Machinery: Excavators, loaders, bulldozers, cranes, mining equipment.
Heavy Vehicles: Chassis and bodies for dumpers and trailers.
Structural Works: Bridges, high-rise buildings, offshore structures, storage tanks.
Power Plants: Penstocks and spiral cases.
Decoding the Name (EN 10025-6)
S: Structural Steel.
690: Minimum Yield Strength in MPa (MegaPascals).
Q: Quenched (heat treatment).
L1: Specifies impact testing at a very low temperature, -60°C, for enhanced low-temperature performance.
S690QL1 Steel Plate Specifications
Steel Standard: EN10025
Grade: 130 KSI, 140 KSI, A514, A710, TMCP 100 KSI, RQT 701, S690QL1, S690QL, S690Q, S890QL1, S890QL, S890Q , S960QL, Weldox 700, WELTEN 780E
Thicknesses: 12-60mm
Widths: 1500-3500mm
Lengths: 1500-3500mm
Standard: ASTM A514/A514M-13
Delivery State:Quenched and Tempered
Packing: Standard seaworthy package
Equivalent Grades Of S690QL1 Structural Steel Plate
|
GRADE |
S690QL |
A709-100 |
TStE690V |
E690T |
FeE690VKT |
2625 |
E690 |
JFE HITEN 780LE |
ALFORM 700 |
|
STANDARDS |
EN |
ASTM |
DIN |
AFNOR/ |
EN |
SS |
ISO 4952 |
JIS |
|
|
COUNTRY |
EUROPE |
USA |
GERMANY |
FRANCE |
EUROPEAN (OLD) |
SWEDON |
INTER |
JAPAN |
AUSTRIA |
|
GRADE |
1.8928 |
||
|
STANDARDS |
GOST |
IS |
|
|
COUNTRY |
BELGIUM |
RUSSIA |
INDIA |
Chemical Composition for S690QL1 Steel Plate
|
C |
Si |
Mn |
Ni |
P |
S |
Cr |
Mo |
V |
N |
Nb |
Ti |
Cu |
Zr |
B |
CEV |
|
max 0.2 |
max 0.8 |
max 1.7 |
max 2 |
max 0.02 |
max 0.01 |
max 1.5 |
max 0.7 |
max 0.12 |
max 0.015 |
max 0.06 |
max 0.05 |
max 0.5 |
max 0.15 |
max 0.005 |
max 0.83 |
Mechanical properties of steel S690QL1 (1.8988)
| Nominal thickness (mm): | 3 - 50 | 50 - 100 | 100 - 150 |
| Rm - Tensile strength (MPa) | 770-940 | 760-930 | 710-900 |
| Nominal thickness (mm): | 3 - 50 | 50 - 100 | 100 - 150 |
| ReH - Minimum yield strength (MPa) | 690 | 650 | 630 |
| KV - Impact energy (J) longitud., | 0° 60 |
-20° 50 |
-40° 40 |
-60° 30 |
| A - Min. elongation Lo = 5,65 √ So (%) | 14 |
1What is the difference between S690QL1 and S690QL?
The main difference between S690QL and S690QL1 is their guaranteed minimum impact energy at different low temperatures: S690QL is typically tested for impact at -40°C, while S690QL1 offers superior cold performance, with a guaranteed impact energy at a lower temperature of -60°C, making it better for extremely cold environments. Both are high-strength quenched and tempered steels with a minimum yield strength of 690 MPa, designed for welded structures like cranes, bridges, and transport vehicles.
2What are the Common Testing Requirements for S690QL1 ?
Common testing for S690QL1 (a high-strength, quenched & tempered steel) includes tensile tests, longitudinal Charpy-V notch impact tests at -60°C (for 30J minimum), chemical analysis (heat/product), and microstructural checks (tempered martensite), ensuring it meets the 690 MPa yield strength and suitability for cold, welded structures, with testing frequencies typically per heat/60-tonne batch per EN 10025-6.
3What is S690QL1 equivalent to ?
S690QL1 (EN 10025-6) is a high-yield strength, quenched, and tempered structural steel; its equivalents include ASTM A709 Grade 100, German TStE 690 V, French E690T, and brand names like DILLIMAX 690 (E) or NAXTRA 70. Key equivalents share similar minimum yield strength (around 690 MPa) and toughness, but always verify specific project requirements, as exact chemical compositions and testing conditions can vary between standards
4Is S690QL1 carbon steel?
Yes, S690QL1 is considered a high-strength low-alloy (HSLA) carbon steel, classified under European standard EN 10025-6, balancing high yield strength (690 MPa) with good toughness, weldability, and controlled chemistry, making it suitable for demanding structural applications. It's often referred to as a carbon structural steel or high strength structural steel, featuring low carbon content for better weldability and alloying elements for enhanced properties, especially at low temperatures.
5What is the composition of S690QL1 ?
S690QL1 is a high-strength, fine-grained structural steel (EN 10025-6) known for excellent toughness at low temperatures, achieved through quenching and tempering, with maximum limits on elements like Carbon (0.20%), Silicon (0.80%), Manganese (1.70%), Phosphorus (0.020%), Sulfur (0.010%), Chromium (1.50%), Molybdenum (0.70%), Nickel (2.0%), and micro-alloying elements like Vanadium, Niobium, and Titanium for grain refinement, ensuring minimum yield strength of 690 MPa.
Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff
