What is S690 grade steel?

S690 is a high-strength structural steel with a minimum yield strength of 690 MPa, specified in the EN 10025-6 standard. It is a quenched and tempered steel, meaning it undergoes a heat treatment process to achieve its high strength and excellent toughness, even at low temperatures. This allows for lighter, more efficient structural designs and is used in applications like bridges, cranes, and high-rise buildings.

Standard：EN 10025-6

Grade：S690Q/S690QL/S690QL1

Classification: High-grade structural steel.

Product:Fine-grain steel post-quenching and tempering.

Specification (mm)：THK: 3 to 300, Width: 1500 to 4050, Length: 3000 to 27000

• EN 10025-2 S690Q Sheet and Plates Chemical Composition

• S690QL - Chemical Composition

The chemical composition of S690QL is provided in the table below.

• Chemical composition % of steel S690QL1 (1.8988): EN 10025-6-2004

• EN 10025-2 S690Q Sheet and Plates Mechanical Properties

• S690QL - Mechanical Properties

The mechanical properties of S690QL is outlined in the table below.

• Mechanical properties of steel S690QL1 (1.8988)

1. Ultra-High Yield Strength: These steel grades exhibit extremely high minimum yield strengths, with S690Q starting at 690 MPa, S690QL at 770 MPa, and S690QL1 at 890 MPa. This makes them ideal for load-bearing structures, such as bridges, cranes, and offshore platforms.
2. Low-Temperature Toughness: S690QL1 steel, in particular, is designed to maintain its high strength even at low temperatures, making it suitable for applications in Arctic or cold environments.
3. Fine-Grained Structure: These grades often have a fine-grained microstructure, which enhances their mechanical properties, including impact toughness and fatigue resistance.
4. Weldability: Despite their high strength, S690Q/QL/QL1 steel grades are known for their good weldability. However, special precautions and welding procedures may be required to ensure high-quality welded joints.
5. Versatility: These steel grades are versatile and find applications in a variety of industries, including construction, mining, and heavy machinery manufacturing. They are used for critical structural components, such as crane booms, pressure vessels, and support structures.
6. Compliance with Standards: S690Q/QL/QL1 steel complies with European standards (EN 10025-6), ensuring consistent quality and performance in demanding structural applications.
7. Quality Assurance: Manufacturers of these steel grades follow stringent quality control procedures to ensure the material's reliability and safety, especially in critical load-bearing applications.

In summary, S690Q/QL/QL1 steel grades are renowned for their exceptional strength and toughness, making them indispensable in construction and engineering projects where high-performance materials are required. Their ability to maintain structural integrity under heavy loads and adverse conditions contributes to the safety and reliability of various industrial and construction applications.

Construction and Infrastructure

In the construction industry,S690Q/QL/QL1 is used for building structures that require high load-bearing capacity and resilience, such as bridges, high-rise buildings, and stadiums. Its ability to withstand heavy loads without compromising structural integrity makes it an invaluable material for infrastructure projects.

Heavy Machinery and Equipment

The manufacturing of heavy machinery, including cranes, earth-moving equipment, and mining machinery, benefits from the high strength and durability ofS690Q/QL/QL1L. It ensures that these machines can operate under extreme conditions and carry heavy loads efficiently.

Transportation and Automotive Industry

In the transportation sector,S690Q/QL/QL1 is used to produce components for heavy-duty trucks, trailers, and other vehicles that require enhanced strength and durability. Its use leads to safer, more reliable vehicles capable of handling demanding tasks.

Partnering with AJ Marshall for Success

S690Q/QL/QL1 ultra high strength steel stands out as a material of choice for numerous high-performance applications due to its exceptional strength, toughness, weldability, and resistance to wear and tear. Its advantages extend beyond just performance, offering cost savings and extended service life, making it an excellent investment for any project requiring superior material properties. Whether in construction, heavy machinery, or transportation, S690Q/QL/QL1 provides the reliability and efficiency needed to meet today's engineering challenges.

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FAQ

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 grade is S690QL material?

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 is S690 grade steel?

S690 high yield & fine grain steel plate is a high strength, quenched and tempered fine-grain structural steel. Structural steel S690 is used in structures that must withstand very heavy loads. This grade is meant for structures where weight savings is important.

What is the equivalent of S690 steel?

Approximate equivalents
ASTM A514, EN 10149-2 Grade S700MC, AS/NZS 3579 Grade 700, AM 700, Bisalloy 80.

What is the price of S690QL material?

S690QL High Strength Steel Plates, Thickness: 5mm to 150mm at ₹ 135/kilogram in Mumbai.

What is the hardness of S690 QL steel?

S690QL steel stockholders and suppliers. S690QL is a quenched and tempered high strength steel supplied in full plates or cut pieces with delivery to the whole of the UK. With its high yield of minimum 690MPa it offers better strength than standard carbon steel grades.

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 difference between S890QL and S690QL?

S690QL, S890QL, and S960QL are all water quenched and tempered steels that comply with the EN10025:6:2004 specification. These ultra high strength steels have a minimum yield strength of 690 MPa, 890 MPa, and 960 Mpa respectively, making them ideal for use in the haulage sector.

What is the difference between S700MC and S690ql?

The S700MC Steel is basically a structural steel plate developed especially for applications requiring high yield strength. They are used for several load bearing applications. The S690ql is a low alloy structural steel which is high in strength and comes with good weldability.

What is the yield strength of s690 steel?

690 MPa.

Yield strength of 690 MPa. Used in structures bearing extremely heavy loads, such as bridges, offshore drilling rigs and buildings, as well as in heavy construction equipment and cranes.