1.8931/S690Q high yield strength En 10025-6 Steel plate

Grade :	S690Q
Number:	1.8931
Classification:	Alloy special steel with specified minimum values of impact energy at temperatures not lower than -20 °C
Standard:	EN 10025-6: 2004 Hot rolled products of structural steels. Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition EN 10137-2: 1996 Plates and wide flats made of high yield strength structural steels in the quenched and tempered or precipitation hardened conditions. Delivery conditions for quenched and tempered steels

 

1.8931/S690Q is a high-strength, quenched and tempered steel plate under EN 10025-6, known as S690Q or S690QL, offering excellent strength-to-weight ratio with a minimum yield strength of 690 MPa (for thinner sections). This versatile steel is used in heavy machinery (cranes, excavators), construction (bridges, columns), and other applications needing lighter, stronger, and more durable components, featuring good weldability and toughness.

 

As a professional high-strength steel plate supplier, GNEE Steel provides certified EN 10025-6 S690Q steel plates with stable quality and global delivery capability.

 

 

S690Q is a quenched and tempered structural steel with a minimum yield strength of 690 MPa, while 1.8931 is its corresponding EN steel number.

• S – Structural steel
• 690 – Minimum yield strength of 690 MPa
• Q – Quenched and tempered delivery condition
• Number - 1.8931

 

Compared with conventional structural steels, S690Q allows designers to reduce plate thickness and overall structure weight without sacrificing safety.

 

 

S690Q steel features a controlled chemical composition that balances strength and weldability.

Optimized carbon content to control carbon equivalent (CE)

Alloying elements such as Mn, Cr, Ni, and Mo

Improved hardenability through Q&T heat treatment

 

Welding Recommendations

Use low-hydrogen welding consumables

Apply suitable preheating depending on thickness

Control heat input during welding

Follow qualified welding procedure specifications (WPS)

With correct procedures, S690Q steel plate can be welded safely and efficiently.

 

 

Due to its excellent high yield strength and comprehensive performance, 1.8931/S690Q steel plate is widely used in various high-demand fields:

 

 

1.8931 / S690Q high yield strength EN 10025-6 steel plate is a versatile and reliable material for modern structural engineering. With its excellent strength, toughness, and weldability, it provides an optimal balance between performance and cost.

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If you are sourcing S690Q steel plates, contact GNEE Steel today for expert consultation, fast quotations, and dependable global delivery.

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What is the difference between S690Q and S690QL?

S690Q: Minimum impact toughness tested at -20°C (30J average). → Typical Use: Cranes in temperate climates, quarry equipment. S690QL: Certified for -40°C and below (≥40J impact toughness). → Critical Use: Arctic pipelines, offshore platforms, mining vehicles in Siberia.

 

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 is the yield strength of S690QL steel?

690 MPa

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.

 

What material is EN 10025 6 S690QL?

S690QL is a high-strength quenched and tempered steel grade that meets the EN 10025 specification. The name S690QL stands for a minimum yield strength of 690 MPa. This steel is engineered to deliver high strength, toughness, wear resistance, and excellent weldability for demanding applications.