Quenched & Tempered, High Strength

EN 10025-6 S690QL is a high-strength structural steel plate with a minimum yield strength of 690 MPa, designed for heavy-load-bearing applications requiring strength, toughness, and weight efficiency. Supplied in a quenched and tempered condition, S690QL provides excellent impact resistance, formability, and weldability, even at low temperatures.

These plates are used in engineering structures, lifting equipment, bridges, cranes, mining and earthmoving machinery, and offshore platforms, where performance under stress is critical.

• Minimum yield strength: 690 MPa

• Excellent strength-to-weight ratio

• Good formability and weldability

• Guaranteed toughness at -40°C

• Ideal for high-load, low-weight structural components

(Actual values vary with plate thickness and origin)

• Ultrasonic Testing (UT) – EN 10160

• Charpy Impact Test – -40°C guaranteed

• Mechanical & Chemical Testing

• Hardness Testing

• Third-Party Inspection – TUV, DNV, Lloyds, SGS, etc. (on request)

• Heavy equipment frames and booms

• Mobile cranes and lifting systems

• Bridges and high-rise structures

• Offshore platforms and modules

• Trailer manufacturing and pressure parts (upon qualification)

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Ultrasonic & Impact Test Reports

• Mechanical and Chemical Analysis

• Full Traceability and QA/QC documentation

Product Overview

JFE HITEN 780LE and WELTEN 780E are advanced high-strength quenched and tempered (Q&T) steel plates produced by JFE Steel Corporation, Japan. These plates are engineered for superior strength (minimum yield strength: 780 MPa) while maintaining excellent weldability, toughness, and formability.

Commonly used in construction machinery, cranes, trucks, bridges, mining equipment, and offshore structures, these plates offer performance, weight reduction, and durability in demanding applications.

Key Features

• High strength: ≥ 780 MPa yield

• Excellent weldability without preheating

• Superior toughness at low temperatures

• Lightweight alternative to conventional structural steels

• Excellent for structural, automotive, offshore, and mobile machinery

Specifications

Chemical Composition (% max, Typical)

Testing & Certification

• Ultrasonic Testing (UT) – as per JIS or EN 10160 standards

• Impact Testing – Charpy V-notch at -40°C

• Hardness Testing – Typically 220–290 HBW

• Mechanical & Chemical Analysis

• Third-party Inspection – TUV, DNV, Lloyd’s, SGS (on request)

Applications

• Crane booms and lifting arms

• Dump truck bodies and trailers

• Mining and earthmoving machinery

• Offshore oil platforms and jack-up rigs

• Welded bridges and structural frameworks

• Heavy-duty industrial equipment and chassis

Advantages over Conventional Steel

• Weight savings of up to 30% over mild steel

• Higher load capacity and fatigue resistance

• Improved fuel efficiency in mobile applications

• Lower fabrication cost due to reduced thickness needs

Certifications & Documentation

• JFE Mill Test Certificate – EN 10204 3.1 / 3.2

• Impact and Hardness Test Reports

• Ultrasonic Test Report

• Chemical and Physical Property Reports

• Third-party QA/QC and export documentation available

Product Overview

Q&T 700 Plates are high-strength quenched and tempered structural steel plates with a minimum yield strength of 700 MPa, designed for demanding structural and load-bearing applications. The quenching and tempering heat treatment process enhances the steel’s tensile strength, toughness, and hardness, while maintaining good formability and weldability.

These plates are widely used in the construction, mining, heavy machinery, transportation, offshore, and energy sectors, especially in applications that require high performance and reduced weight.

Key Features

• Minimum yield strength of 700 MPa

• Excellent strength-to-weight ratio

• Good toughness at low temperatures

• Superior wear resistance and impact strength

• Suitable for structural, automotive, and offshore applications

• Good weldability and machinability (with preheating for thick sections)

Specifications

Mechanical Properties (Typical)

Chemical Composition (Typical %)

(Values may vary depending on specific grade or standard.)

Testing & Quality Assurance

• Ultrasonic Testing (UT) – EN 10160 / ASTM A578

• Impact Testing – Charpy V-Notch at -40°C

• Tensile and Bend Tests

• Hardness and Chemical Analysis

• Third-Party Inspection – TUV, DNV, Lloyds, SGS (on request)

Applications

• Crane booms, lifting equipment

• Mobile trailers and tipper trucks

• Mining dump bodies and excavators

• Structural bridges and offshore platforms

• Wind towers and transmission structures

• Heavy-duty machinery and pressure components

Certifications & Documentation

• Mill Test Certificates – EN 10204 3.1 / 3.2

• Heat Treatment Records

• Impact and Mechanical Test Reports

• Third-party inspection reports (on request)

• Traceability and compliance documentation

Quenched and Tempered (Q&T) steel plates are high-strength, toughened steel plates manufactured through a two-stage heat treatment process: quenching (rapid cooling) followed by tempering (controlled reheating). This process significantly enhances the plate’s strength, hardness, impact resistance, and toughness.

These plates are widely used in structural and pressure vessel fabrication, mining equipment, construction machinery, military armor, bridges, and offshore structures, especially where weight reduction without compromising strength is essential.

• High yield and tensile strength

• Superior impact resistance and crack arrest capability

• Excellent toughness, even at low temperatures

• Good formability and weldability (depending on grade)

• Ideal for weight-sensitive, high-load applications

Higher grades like S890QL and S960QL offer even higher strength values.

• Ultrasonic Testing (UT) – As per EN 10160 / ASTM A578

• Charpy Impact Testing (at -20°C, -40°C or -60°C)

• Hardness Testing (Brinell or Rockwell)

• Chemical Analysis, PMI, Spectro Test

• Flattening / Bending / Tensile Test

• Third-Party Inspection – TUV, DNV, Lloyds, BV, SGS

• High-strength mobile and lifting equipment

• Offshore oil and gas structures

• Construction cranes and bridges

• Military vehicles and armor plating

• Heavy earth-moving and mining equipment

• Pressure vessels and welded tanks (in select grades)

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Impact Testing Report

• Ultrasonic Testing Report

• Heat Treatment and Mechanical Test Records

• Full Traceability and Third-Party Inspection (on request)

Would you like:

• A comparison between Q&T steel and normalized steel plates?

• A PDF brochure with product images and specifications?

• Export packing and delivery details?

QUEND 700 is a premium-grade, quenched and tempered (Q&T) structural steel plate with a minimum yield strength of 700 MPa, designed for applications where high strength and reduced weight are essential. Manufactured by NLMK Clabecq (Belgium), QUEND 700 delivers superior mechanical properties, fatigue resistance, and formability, making it ideal for lifting equipment, heavy transport vehicles, mobile cranes, trailers, and structural applications.

Thanks to tight control over the production process, QUEND plates offer excellent flatness, consistent thickness tolerance, and high notch toughness even at sub-zero temperatures.

• Minimum yield strength: 700 MPa

• Excellent weldability and formability

• Guaranteed impact toughness at -40°C

• Outstanding flatness tolerance (≤ 3 mm/m)

• Optimized for laser/plasma cutting and bending

• Weight savings for high-load structural designs

Composition may vary slightly with plate thickness and batch.

• Ultrasonic Testing (UT) – EN 10160 / ASTM A578

• Charpy Impact Test – Guaranteed at -40°C

• Tensile & Hardness Testing

• Dimensional Inspection and Flatness Testing

• Third-Party Inspection – TUV, DNV, SGS, BV (on request)

• Mobile cranes and hydraulic lifting arms

• Heavy trailers, dump trucks, and tippers

• Structural components in construction and offshore rigs

• Chassis and framework for earthmoving machinery

• Telescopic booms and lifting towers

• High-load welded structural parts where weight is a constraint

• Reduces weight without compromising strength

• Enhances fuel efficiency in mobile and transport equipment

• Lower material thickness required for the same load-bearing capacity

• Improved safety and stability in high-lift structures

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Impact and Tensile Test Reports

• UT and Dimensional Inspection Reports

• Welding Guidelines

• Full Traceability and QA Documentation

S890QL is a quenched and tempered high-strength structural steel plate manufactured in accordance with EN 10025-6. With a minimum yield strength of 890 MPa, it is ideal for load-bearing structures where reduced weight and high mechanical performance are essential.

Commonly used in crane construction, trailer manufacturing, bridges, mining machinery, and offshore platforms, these plates deliver outstanding performance under high stress and in low-temperature environments.

• High yield strength: ≥ 890 MPa

• Excellent weldability and formability

• Guaranteed impact resistance at -40°C (Charpy V-notch)

• Suitable for weight-saving, high-load designs

• Consistent dimensional and mechanical properties

• Ultrasonic Testing (UT) as per EN 10160

• Charpy Impact Testing at -40°C

• Tensile, yield, and elongation testing

• Hardness and chemical composition analysis

• Third-party inspection available: TUV, DNV, BV, SGS

• Crane arms, booms, and towers

• Structural bridges and high-rise supports

• Mining equipment and dump bodies

• Offshore drilling structures

• Heavy transport chassis and frameworks

• Mill Test Certificate – EN 10204 3.1 / 3.2

• Ultrasonic and impact test reports

• Full mechanical and chemical test data

• Dimensional and flatness inspection records

• Third-party QA/QC documentation on request