Description
S690QL High Yield Structural Steel Plates
S690QL Plates is a High Yield Structural Steel grade produced in compliance with EN 10025:6:2004. The material is heat treated using the quench and temper process and has good bending and welding properties. Due to the materials high strength nature, using S690QL will promote leaner designed structures with increased payload capacity and energy efficiency.
S690QL is a high strength quenched and tempered steel grade that complies to steel specification EN 10025. The designation S690QL refers to a minimum yield strength of 690 MPa.
The combination of good availability and pricing and high strength combined with ease of fabrication has made S690QL steel plate a popular grade for both mobile applications such as cranes and lifting equipment and fixed steel structures. The high strength nature of this steel means that structures can be designed lighter and for mobile application this means increase in payload and operational efficiency.
S690QL is a high strength, low alloy structural steel with good weldability and bending properties. This high yield, high tensile versatile product is often chosen by designers to reduce weight in structures.
We New Arise Metal are major Stockist of EN10025-6 S690QL Plates. We Stock from major indian manufacturer like AM/NS, JSPL, Jindal, etc and from some imported reputed manufacturers.
S690QL – Grade Designation :
The grade designation of S690QL are the following:
- • S = Structural Steel
• 690 = minimum yield strength (MPa)
• Q = Quenching & Tempering
• L = Low notch toughness testing temperature
S690QL Chemical Composition :
| Element | Percentage % | Element | Percentage % |
| C | 0.2 | Cu | 0.5 |
| Si | 0.8 | Mo | 0.7 |
| Mn | 1.7 | Nb* | 0.06 |
| P | 0.025 | Ni | 2 |
| S | 0.015 | Ti* | 0.05 |
| N | 0.015 | V* | 0.12 |
| B | 0.005 | Zr* | 0.15 |
| Cr | 1.5 |
* At least 0.015% of grain-refining element present. Aluminium is also one of these elements.
S690QL Plates Mechanical Properties :
The mechanical properties of S690QL is outlined in the table below.
| Designation | Mechanical Properties (ambient temperature) | |||||||
| Steel Name | Steel Number | Min. Yield Strength Reh MPa | Tensile Strength Rm MPa | Min. % elongation after fracture | ||||
| Nominal thickness (mm) | Nominal thickness (mm) | |||||||
| ≥3 ≤50 | ≥50 ≤100 | ≥100 ≤150 | ≥3 ≤50 | ≥50 ≤100 | ≥100 ≤150 | |||
| S690QL | 1.8931 | 690 | 650 | 630 | 770 – 940 | 760 – 930 | 710 – 900 | 14 |
| PLATE THICKNESS MM | YIELD STRENGTHREH (MPA) | TENSILE STRENGTH RM (MPA) | ELONGATION A5 % MINIMUM | IMPACT STRENGTH J, MINIMUM |
| 3 to 50 | 690 | 770 – 940 | 14 | 30 @ -40º C |
| 50 to 100 | 650 | 760 – 930 | 14 | 30 @ -40º C |
| 100 to 150 | 630 | 710 – 900 | 14 | 30 @ -40º C |
V notch impact testing :
| Grade | Sample Orientation | at 0°C | at -20°C | at -40°C |
| S690QL | Longitudinal | 50J | 40J | 30J |
| S690QL | Transverse | 35J | 30J | 27J |
Applications of S690QL Plates :
S690QL high yield structural steel is used in a variety of sectors including:
- • Heavy transportation
- • Machine building
- • Steel constructions
- • Lifting equipment
- • Offshore
• Oil & gas
• Energy
• Mining
• Yellow goods
• Structural
• Material handling
• Sports stadium
High strength quenched and tempered steel plate can be easily welded and fabricated.
We often find that steel plate to EN 10025 S690QL is called different things by different engineers. Plate to this specification and grade is variously described as:
- • High Strength Quenched and Tempered Steel Plate
- • High Yield Quenched and Tempered Steel Plate
- • High Strength Structural Steel Plate,
- • High Yield Structural Steel Plate
- • High Strength Low Alloy Steel Plate
- • HSLA
Fabrication of EN 10025 S690QL Plates :
High strength quenched and tempered steel plate can be easily welded and fabricated but its high yield strength and tensile strength compared with mild steel means that it should be treated with some caution. We have provided information which is intended as a basic guide to various fabrication methods.
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