S690QL1 High Structural Steel Plate | High Strength Steel
S690QL1 steel plate, better known as SUPRALSIM 690, is an ideal budget steel plate, offering minimum yield strength of 690 MPa.
Our S690QL1 structural steel plates are fine-grained for maximum performance in precarious working conditions. Produced in compliance with EN10025:6:2004, these structural steel plates are rampantly applied where high strength and light weight are needed.
S690QL1 is a European standard (EN 10025-6) high-yield strength, quenched and tempered structural steel, known for its exceptional strength (minimum 690 MPa yield) and excellent low-temperature toughness (impact tested at -60°C), making it ideal for heavy-duty applications in cranes, bridges, mining equipment, and construction where high load capacity and performance in cold conditions are critical. The "S" denotes structural steel, "690" its yield strength in MPa, "Q" means quenched and tempered, and "L1" specifies the lower -60°C impact test temperature, distinguishingit from S690QL (-40°C) and S690Q (-20°C).
Key Characteristics
High Strength: Minimum yield strength of 690 MPa (for thinner sections) and high tensile strength.
Low-Temperature Toughness: Good impact strength even at -60°C, crucial for cold climates and offshore use.
Weldability: Designed for good weldability, allowing for complex fabrications.
High Strength-to-Weight Ratio: Enables lighter structures while maintaining load capacity.
Material Designation Breakdown
S: Structural Steel
690: Minimum Yield Strength (690 MPa)
Q: Quenched and Tempered delivery condition
L1: Impact tested at a minimum of -60°C
S690QL1 steel plate production process:
1. Raw materials (scrap steel, pig iron and molten iron)
2. Electric furnace (100-ton electric arc furnace smelting), converter
3. LF furnace molten steel refining treatment
4. Vacuum treatment of molten steel in VD or VOD furnace
5. Die casting (a variety of key-type die casting lines) or continuous casting (large slab continuous casting machine); (one ingot remelting 50 tons slab type electroslag furnace)
6. Heating (continuous furnace and soaking furnace)
7. Steel plate rolling (4100 and 4200mm mills)
8. Heat treatment of steel plate (normalizing and tempering)
9. Steel plate cutting inspection
10. Storage
Common Applications
Heavy Machinery: Excavators, loaders, dump trucks, mining equipment.
Lifting Equipment: Booms for cranes, mobile cranes.
Construction: Bridges, high-rise buildings, offshore platforms.
Transport: Chassis for heavy road vehicles, trailers.
Equivalent CET(CEV)
| GRADE | S690QL EN10137-2 EN10025-6:2004 |
A709-100 | TStE690V DILLIMAX 690 NAXTRA 70 |
E690T E690TFP S690T |
FeE690VKT | 2625 WELDOX 700 |
E690 | JFE HITEN 780LE | ALFORM 700 |
| STANDARDS | EN | ASTM | DIN , WNr |
AFNOR/ NF A36- 204 |
EN | SS | ISO 4952 | JIS | |
| COUNTRY | EUROPE | USA | GERMANY | FRANCE | EUROPEAN (OLD) | SWEDON | INTER | JAPAN | AUSTRIA |
Chemical composition % of steel S690QL1 (1.8988): EN 10025-6-2004
| 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 |
S690QL1 Steel Plate Notch Impact Energy
|
Steel Grade |
Position of Samples |
0°C |
- 20°C |
- 40°C |
- 60°C |
|
S690QL1 |
LongitudinalTransverse |
60 J40 J |
50 J35 J |
40 J30 J |
30 J27 J |
1What are the typical application fields of S690QL1
S690QL1 is a high-strength, fine-grained structural steel used in demanding applications requiring lightweight yet robust components, particularly in heavy machinery (excavators, cranes, bulldozers), construction (bridges, high-rise frameworks, mining equipment like hydraulic supports), transportation (heavy vehicle chassis, dumper bodies), and offshore structures, benefiting from its excellent toughness at low temperatures (guaranteed at -60°C) and good weldability for energy-efficient designs.
2What precautions should be taken when welding material of S690QL1?
When welding S690QL1, focus on low hydrogen practices, controlled heat input, specific preheating/interpass temps (150-200°C), and appropriate filler metals (low-hydrogen basic electrodes/wires) to prevent hydrogen-induced cracking, maintain toughness, and control residual stresses in this high-strength steel. Proper cleaning, post-weld treatment, and adhering to standards like EN 1011 are crucial for structural integrity, especially for dynamically loaded structures.
3What are Common Testing Requirements for S690QL1?
Common testing for S690QL1 steel, a high-strength structural steel, focuses on its exceptional mechanical properties, primarily requiring Charpy-V impact tests at -60°C (30J) for toughness, along with standard tensile tests (Yield Strength > 690 MPa, Tensile Strength) and chemical analysis for composition (like Carbon, Silicon, Boron), all governed by the EN 10025-6 standard for consistent quality, weldability, and suitability for demanding, low-temperature applications.
4What is S690QL1 equivalent to?
S690QL1 (EN 10025-6) is a high-strength, quenched & tempered steel with a 690 MPa yield strength, equivalent to grades like ASTM A709 Grade 100, German TStE690V / DILLIMAX 690, French E690T, and Swedish WELDOX 700 (Strenx 700), though specific conditions and codes must always be checked for direct substitution. The '1' in S690QL1 signifies stricter controls for improved properties like through-thickness ductility compared to S690QL.
5What is the hardness of S690QL1 ?
S690QL1 is a high-strength structural steel with a specified minimum yield strength of 690 MPa, and while hardness isn't a primary requirement, typical values for similar grades like S690QL often fall in the range of 235-295 BHN (Brinell Hardness Number), with variations based on thickness, manufacturing, and specific post-treatment. It's known for toughness and weldability, not extreme hardness like tool steels, achieving strength through quenching and tempering.
For more details about GNEE's steel products, contact us at info@gneesteels.com . We look forward to working with you.
