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  • DNV D420
  • NV D420

DNV Grade D420,NV D420

  • Steel Standard: DNV (Det Norske Veritas)
  • 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
Comparing common strength shipbuilding steel grades,DNV D420 shipbuilding steel plate owned higher yield strength and tensile strength.Ship plate DNV D420 is the Hull structural steel,with it's good toughness properties, higher strength,strong corrosion-resistance,the processing properties,and welding properties.In the steel standard ABS DQ43 is the best equvialent steel grade with NV D420.
■ 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 DNV Grade D420 shipbuilding structual steel:

Yield strength (≥Mpa) Tensile strength (Mpa) Impacting test
420 530-680
-20 Centigrade

Chemical composition for DNV Grade D420 ship steel (Heat Analysis Max%)

Main chemical elements composition of DNV Grade D420
C Si Mn P S N
0.20 0.55 1.70 0.030 0.030 0.02

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