Structural steel
S690QL1 / 1.8988 high-strength steel
S690QL1 is the same 690 MPa class as S690QL, with documented impact toughness at −60 °C. QL1 is the colder certificate – not a different yield strength. INDUSTRISTÅL supplies plate with 3.1. It is not a quenched and tempered steel for shafts.
Typical applications
- Cranes and booms
- Cold-climate structures
- Slender sections
Delivery conditions
- quenched and tempered / QL1 to EN 10025-6
Designations
- W.Nr.
- 1.8988
- EN standard
- S690QL1
- Group
- Non-alloy structural steel
Machinability and weldability
Welding requires a strict procedure. Not S355 workshop welding.
Sawing and machining
Cutting with controlled heat input.
Certificates and documentation
EN 10204/3.1. Impact toughness at −60 °C only when the certificate covers QL1.
Dimension programme
| Form | Range | Note |
|---|---|---|
| Plate | 6–80 mm thickness | QL1 when impact toughness must be documented at a lower temperature. |
| Seamless tube | Ø6–Ø2000 mm | Seamless DIN/EN. Wall to EN 10220. State DN, wall and 3.1/3.2. |
| Welded tube | Ø6–Ø2000 mm | Welded DIN/EN. Wall to EN 10220. State weld seam and certificate. |
Parts of the range are held by European partners; other dimensions can be sourced. The range is not a current stock status in every diameter — stock is confirmed on enquiry.
Frequently asked questions
- What is S690QL1?
- 690 MPa structural steel with impact toughness at −60 °C.
- QL or QL1?
- QL is −40 °C. QL1 is −60 °C. Same yield strength.
- Do you supply S690QL1?
- Yes. State thickness and whether QL1 is to be documented.
Read more
Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.