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  • LR Grade D550
  • LR D550

LR Grade D550,LR D550

  • 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

Shipbuilding steel plate LR D500 mainly be used in below minus 20 centigree ocean situiation. LR D500 steel is done low temperature impacting test when rolling in our steel mill.In addition to the basic requirements of this specification for steel plate LR D500,certain supplementary requirements are available whenadditional control, testing, or examination is required to meetend use requirements. These include:1 Vacuum treatment,2 Additional or special tension testing,3 Impact testing, 4 Nondestructive examination.

■ 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 D550 shipbuilding structual steel:

Yield strength (≥Mpa) Tensile strength (Mpa) Impacting test
550 670-835
-20 Centigrade

Chemical composition for LR Grade D550 ship steel (Heat Analysis Max%)

Main chemical elements composition of LR Grade D550
C Si Mn P S N
0.20 0.55 1.70 0.030 0.030 0.02

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