Diamond Alloys Inc

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

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