EN 10025-6 S690QL vs S355 steel plate

S690QL is a high-strength steel with a minimum yield strength of 690MPa, while S355 is a general structural steel with a minimum yield strength of 355MPa.

S690QL is used for applications requiring high strength-to-weight ratios, like construction and heavy equipment, while S355 is a more common and cost-effective choice for a wider range of structural applications.

S355J2 and S690QL are steels with distinct mechanical properties and application areas:

• S355J2

Yield Strength: ~355 MPa

Tensile Strength: 490-630 MPa

Commonly used in low-cost structural applications.

• S690QL

Yield Strength: ~690 MPa

Tensile Strength: 770-940 MPa

Designed for applications requiring high strength.

S690QL:

Adopts Quenched + Tempered (Q+T) process

Heated to 890-930℃ for quenching, then tempered at 580-620℃

Forms tempered sorbite structure to achieve a balance between high strength and toughness

S355:

Generally delivered in hot-rolled or normalized condition

No complex heat treatment required, resulting in lower production costs

• Applicable Scenarios for S690QL:

Engineering Machinery: Crane booms, excavator arms, mining machinery frames

Bridge Engineering: Main girders of long-span bridges, cable-stayed bridge pylons

Marine Engineering: Offshore platforms, polar oil and gas pipelines

Special Vehicles: Heavy-duty truck frames, military vehicle armor

High-Rise Buildings: Long-span roof trusses, seismic support systems

• Applicable Scenarios for S355:

General Building Structures: Factory buildings, office building frames

Infrastructure: Ordinary bridges, culverts, dams

Mechanical Manufacturing: General equipment frames and supports

Ship Engineering: General hull structures, decks

Agricultural Machinery: Tractor frames, harvester supports

Core Application Difference: S690QL is suitable for high-strength, lightweight, high-reliability key structures; S355 is widely used in general structures with conventional strength requirements and higher cost-effectiveness.

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What is the equivalent of S690QL?

S690ql is a structural high-strength grade. The ASTM En 10025 6 S690ql Equivalent Astm is the Q345 grade. The grade exhibits outstanding cold stamping and low-temperature properties.

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 equivalent to S355 steel?

S355 Equivalent Plate Grade

The chemical composition and mechanical properties of S355 are governed by EN Standards However, some projects may require materials that meet ASTM standards. ASTM has identified A572-50 as an acceptable substitution for S355.

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). → Critical Use: Arctic pipelines, offshore platforms, mining vehicles in Siberia.

What is S355 grade steel?

Description. S355 grade steel is a medium tensile, low carbon manganese steel which is readily weldable and possesses good impact resistance (also in sub-zero temperatures).