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JFE HITEN 780LE/WELTEN 780E Plates

JFE HITEN 780LE/WELTEN 780E Plates
Material Origin: Japanese Engineering (JFE / Nippon Steel)
Tensile Strength: 780 - 930 MPa Class
Material Grade: HITEN 780LE / WELTEN 780E
Yield Strength: 685 MPa (Minimum)
Condition: Quenched & Tempered (Q+T)
Weldability: Low PCM for Superior Weld Integrity
Low Temp Toughness: Tested at -40°C / -60°C (E/LE Grade)
Core Applications: Penstocks, Pressure Vessels, Offshore Structures
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JFE HITEN 780LE and WELTEN 780E Plates are world-class, high-tensile strength steels developed by Japan's leading steelmakers (JFE Steel and Nippon Steel). These grades belong to the 780 MPa class of Quenched and Tempered (Q&T) steels, engineered to provide a formidable combination of high yield strength and exceptional fracture toughness. The "E" and "LE" designations signify superior low-temperature properties, ensuring that the material remains ductile and resistant to brittle failure even in sub-zero environments. This makes them indispensable for large-scale structural projects where safety and weight reduction are paramount.

One of the standout characteristics of HITEN and WELTEN series steel is its unmatched weldability. By utilizing advanced Thermo-Mechanical Controlled Processing (TMCP) and maintaining a low carbon equivalent (Ceq) and welding cracking parameter (Pcm), these plates significantly reduce the risk of cold cracking during fabrication. This allows for high-efficiency welding with minimal preheating requirements. These plates are the industry standard for high-stress applications such as hydroelectric penstocks, bridges, industrial machinery, and offshore structures, offering engineers a reliable solution for complex, heavy-load constructions.



JFE HITEN 780LE/WELTEN 780E Plates Features

  • » High Strength-to-Weight Ratio: With a minimum yield strength of 685 MPa and tensile strength up to 930 MPa, these plates allow for thinner sections, reducing the total weight of large-scale structures.
  • » Superior Weldability: Engineered with low carbon equivalents (Ceq) and low PCM values, these plates minimize the risk of cold cracking and often require little to no preheating during welding.
  • » Excellent Low-Temperature Toughness: The "LE" and "E" grades are specifically designed to maintain high impact energy absorption at sub-zero temperatures (tested down to -40°C / -60°C).
  • » Quenched and Tempered Excellence: Utilizing Japanese precision Q+T technology, the plates exhibit a uniform martensitic-bainitic microstructure for consistent performance across every square inch.
  • » Exceptional Fracture Toughness: High resistance to crack initiation and propagation, making it the ideal choice for high-pressure penstocks and bridge components subject to fatigue.
  • » Outstanding Formability: Despite its high strength, the material offers good cold-bending properties, facilitating the fabrication of curved sections and cylindrical vessels.
  • » Atmospheric Corrosion Resistance: The refined chemical composition provides better durability against environmental degradation compared to standard high-strength steels.
  • » Tight Dimensional Tolerances: Manufactured to strict Japanese industrial standards, ensuring excellent surface flatness and precise thickness for automated cutting and assembly.

JFE HITEN 780LE/WELTEN 780E Plates Specification

Standard Specs

  • JFE Grade: HITEN 780LE
  • Nippon Grade: WELTEN 780E
  • Standard: JIS G3128 / WES 3001
  • Condition: Quenched & Tempered

Mechanical Data

  • Yield Strength: 685 MPa (Min)
  • Tensile Strength: 780 – 930 MPa
  • Elongation: 16% (Min)
  • Impact Energy: 47J at -40°C / -60°C

Chemical Profile

  • Carbon (C): 0.18% Max
  • Ceq (Carbon Eq): ≤ 0.45%
  • Pcm (Weldability): ≤ 0.28%
  • Sulfur/Phos: Ultra-Low Trace

Size Range

  • Thickness: 6mm to 100mm
  • Width: Up to 3500mm
  • Length: Up to 15000mm
  • Edge Finish: Clean Trimmed

Testing Index

  • Fracture: CTOD Testing Available
  • NDT: Ultrasonic (JIS G0801)
  • Bend: 180° Cold Bend Test
  • Hardness: HV / HB Reporting

Quality Control

  • MTC: EN 10204 3.1 & 3.2
  • Origin: Japan (JFE / NSSMC)
  • Logo/Stamp: Original Mill Stamping
  • Inspection: BV, TUV, LRS, ABS

JFE HITEN 780LE/WELTEN 780E Plates Detailed Specifications

Property Specification
Standard ASTM A514/A709
Thickness 5mm-150mm
Width 1000mm-4500mm
Length 3000mm -18000mm
Process Hot Rolled (HR)
Delivery State Quenched and Tempered

JFE HITEN 780LE/WELTEN 780E Plates Chemical Composition

C Mn B Ceq*
≤0.20 1.60 max .≤0.005 ≤0.40 1

JFE HITEN 780LE/WELTEN 780E Plates Mechanical Properties

Thickness (mm) Yield Strength Min. (N/mm 2) Tensile Strength (N/mm 2) Features
6 ~ 32 685 780 ~ 930 High Weldability and excellent toughness at low temperature (-40 C), for Civil Engineering and Industrial Machiner

JFE HITEN 780LE/WELTEN 780E Plates Equivalent Grades

JFE Standard ASTM JIS WES
JFE-HITEN 780LE/WELTEN 780E A514
A709 Gr.100
G3128 SHY685
SHY685N
SHY685NS
HW 685

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
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