Chemical composition and mechanical properties of DNV E690 ship plate

1. The meaning of DNV E690: DNV is the Norwegian Shipbuilding Agency certification, E is the grade of steel plate, which can be divided into A, D, E, etc. 690 means the yield value of DNV E690 ship plate is 690 MPa. Our shipbuilding steels have been certified by the classification societies of nine countries including CCS, DNV, ABS, GL, LR, BV, RINA, NK, KR (China, Norway, the United States, Germany, the United Kingdom, France, Italy, Japan, South Korea). The quality assurance system has passed ISO9001-2015 standard certification.

2. Delivery status and Z-direction performance of DNV E690 ship plate:
Delivery status: According to user requirements, it can be delivered in different states such as hot rolling, normalizing, tempering, normalizing and tempering, quenching and tempering, TMCP, etc.
Z-direction performance: Z15, Z25, Z35

3. The chemical composition of DNV E690 ship plate:

C Si Mn P S Cu Ni Al
≤0.18 ≤0.35 ≤0.70 ≤0.025 ≤0.025 ≤0.035 ≤0.035 ≤0.015

4. The production process of DNV E690 ship plate:
1) Raw materials (scrap steel, pig iron and molten iron)
2) Electric furnace (100-ton electric arc furnace smelting), converter
3) LF furnace molten steel refining treatment
4) Vacuum treatment of molten steel in VD or VOD furnace
5) Die casting (various key type die casting lines) or continuous casting (large slab continuous casting machine); (a steel ingot remelting treatment 50 tons slab electroslag furnace)
6) Heating (continuous furnace and soaking furnace)
7) Steel plate rolling (4100 and 4200mm rolling mills)
8) Heat treatment of steel plate (normalizing, tempering and tempering)
9) Steel plate cutting inspection
10) Storage

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