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  • LR Grade F550
  • LR F550

LR Grade F550,LR F550

  • Steel Standard: LR (Lloyd’s Register)
  • Rolling Type: Extra high strength ship plate
  • Thickness: 6mm-250mm
  • Width: 1500mm-4200mm
  • Length: 3000mm-18000mm
  • Heat Treatment: Quenched and Tempered
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■ Overview

The higher steel grade LR F550 shipbuilding steel plate are used abnormally owning to its high cost and substitutability.With the minimum yield point at 550 Mpa,and tensile strength within 670-835 Mpa,steel plate LR F550 can bear the higher strength and used to some steel structure parts in ships.At current,Xinsteel is cooperating with Wuyang steel mill about starting rolling the heavy shipbuilding steel plate LR F550 with the unit weight about 30 tons.

■ Full Data
Technical Requirements & Additional Services:
♦ High tension test
♦ Z-Test (Z15,Z25,Z35)
♦ Low temperature impacting test
♦ Ultrasonic test under ASTM A435,A577,A578
♦ Cetificated by ABS,LR,GL,BV,DNV,KR,NK,CCS,RINA
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Shot blasting and Painting,Cutting and welding as per end user’s demands 
■ Techicals

Mechnical property for LR Grade F550 shipbuilding structual steel:

Yield strength (≥Mpa) Tensile strength (Mpa) Impacting test
550 670-835
-60 Centigrade

Chemical composition for LR Grade F550 ship steel (Heat Analysis Max%)

Main chemical elements composition of LR Grade F550
C Si Mn P S N
0.18 0.55 1.60 0.025 0.025 0.02

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