S690QL High Tensile Steel Plate: Properties, Benefits, and Uses

S690QL is a high-strength, low-alloy steel with superior corrosion resistance and extraordinary mechanical properties. Although S690QL is one of the most preferred choices, several other equivalent steel grades may perform similarly or even better. This article discusses some of the best S690QL plate equivalents, their properties, benefits, and typical uses.

The chemical composition of S690QL includes:

Carbon (C): Max 0.20%

Silicon (Si): Max 0.80%

Manganese (Mn): Max 1.70%

Phosphorus (P): Max 0.020%

Sulfur (S): Max 0.010%

Chromium (Cr): Max 1.50%

Molybdenum (Mo): Max 0.70%

Nickel (Ni): Max 2.00%

Boron (B): Max 0.005%

These elements contribute to the steel's strength, toughness, and weldability.

S700MC: The grades contain excellent weldability and formability with minimum yield strengths of 700 MPa, making this material an excellent substitute for S690QL in many application contexts.

S890QL: This grade, quenching and tempering grades offer a minimum yield strength of 890 MPa, which makes this an excellent option where a high strength-to-weight ratio needs to be achieved.

S960QL: With a minimum yield strength of 960 MPa, S960QL is classified as an ultra-high-strength steel that can replace S690QL when significantly greater strength is necessary.

Increased Load-Bearing Capacity

Structural Efficiency: Due to its high strength-to-weight ratio, S690QL allows for the construction of lighter structures that can bear significant loads. This enhances structural efficiency and can lead to cost savings in terms of material usage and transportation.

Cost-Effective

Reduced Material Usage: The strength of S690QL means that less material is required to achieve the same load-bearing capacity compared to lower strength steels. This can result in lower material costs and reduced overall project expenses.

Durability and Longevity

Extended Service Life: The superior mechanical properties of S690QL contribute to longer service life for structures and components. This means less frequent replacements and lower maintenance costs over time.

Versatility in Applications

Diverse Applications: The unique combination of strength, toughness, and weldability makes S690QL suitable for a wide range of applications, including:

• Construction of bridges and high-rise buildings
• Manufacturing of cranes and lifting equipment
• Production of heavy-duty vehicles and machinery
• Fabrication of offshore structures and wind turbines

The S690QL equivalents, having properties of high strength and corrosion resistance, along with excellent weldability, relate to broad use in a wide range of applications, including the following:

Offshore and Marine Structures: These are mostly used in producing offshore platforms and vessels, marine structures, and other marine projects that involve harsh conditions.

Heavy Machinery and Equipment: The strength-to-weight ratio is superior, making them highly suitable for producing tremendous machines like cranes, mining machinery, and many more.

Bridges and Infrastructure: The superior strength and resistance to corrosion make these materials highly in use for construction, including bridge construction and other infrastructures.

Automotive and Transportation: High strength and good formability enable manufacturing to produce lightweight, high-performance automotive and transportation components.

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FAQ

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 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).

What is S690QL used for?

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.

What is the hardness of S690QL?

With a Brinell hardness value of 414HBW, the high-strength S690ql steel grade is created.

What is the difference between Weldox 700 and S690QL?

The versatile Weldox 700 shows excellent formability and can be welded following standard welding procedures. With excellent consistency and hardness, the Strenx S690ql grade has enhanced toughness and superior resistance against fracture induced by stress.

How thick is S690 steel?

Plates of S690 steel grade are available with thicknesses of 8-100 mm for Q and QL quality groups and with thicknesses of 8-50 mm for QL1 quality group.

What is the yield of S690QL?

High Yield Strength: The most notable feature of S690QL is its high yield strength of 690 MPa. This allows for the creation of lighter and thinner structures without compromising on strength or stability. Enhanced Toughness: S690QL exhibits excellent toughness, even at low temperatures.

What is the price of S690QL material in china

¥4550–4650/T

What is the equivalent of S690 steel?

Q690

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