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  • LR Grade A550
  • LR A550

LR Grade A550,LR A550

  • 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 highest tensile strength in normal shipbuilding steel,LR A550 ship plate is normally used to build ships which are sailing in the bad surroudings,such as coldest ocean waters and the tough situiation.Icebreakers are the main end application for LR A550 marine steel plate.LR Grade A550 can bear the tough ice pieces and low temperature ocean water owing it have to be done impacting test under minus 40 centigree when rolling.
■ 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 A550 shipbuilding structual steel:

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

Chemical composition for LR Grade A550 ship steel (Heat Analysis Max%)

Main chemical elements composition of LR Grade A550
C Si Mn P S N
0.21 0.55 1.70 0.035 0.035 0.02

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