DNV-A Det Norske Veritas Ship Plate, NVA Ship Plate Specification, NV/A Marine Steel Plate

DNV-A Det Norske Veritas Ship Plate, NVA Ship Plate Specification, NV/A Marine Steel Plate

DNV-A is a Det Norske Veritas certified ship plate, DNV-A ship plate is suitable for the manufacture of ship hull structures, docks, oil production platforms, marine transmission pipelines, coastal power plants, dock facilities and other structural parts in ocean-going, coastal and inland navigation areas.

General strength ship plates: A, B, D, E. High-strength shipboard: AH32, AH36, AH40, DH32, DH36, DH40, EH32, EH36, EH40, FH36 and ultra-high-strength shipboard DH460, EH460, EH550, EH690, etc. Thickness: 3-80mm, width 1500-4000mm, length 4000-19000mm. Certified by the world's nine major classification societies (CCS, ABS, VL, LR, BV, NK, KR, RINA, RS).

DNV - Det Norske Veritas - the largest classification society

Det Norske Veritas, formerly known as DNV GL, is the world's largest classification society. It was founded in 2013 after two prominent classification societies, Det Norske Veritas, headquartered in Norway, and Deutsche Lloyd's Det Veritas, headquartered in Germany, merged into a single entity. In 2021, DNV GL dropped its surname and changed its name to DNV, while continuing to retain its original organizational and functional structure. It sets specific standards for ships and offshore vessels, known as class rules.

Operating in more than 100 countries, DNV employs more than 13,000 people from different cultures and nationalities and has more than 350 administrative offices worldwide. The organization provides a variety of services to a wide range of industries outside of the maritime sector. It has a prominent position in oil and gas, innovation and research and development in renewable energy systems, modern power solutions, and the health sector.

The classification society serves more than 14,000 vessels and offshore structures worth 265 million tonnes, accounting for 21% of the global market share. The organization's history dates back to 1864, when it was founded in Oslo, Norway, to inspect the operations of Norwegian merchant ships. Since then, it has grown significantly by providing testing, class certification for ships, offshore installations and technical services.

Mechanical properties and chemical composition of DNV-A ship plates

General strength: mechanical properties and chemical composition of hull structural steel

Steel grade

Yield point

σs(MPa) is not less than

tensile strength

σb(MPa)

Elongation σ%

Not less than

carbon

C

manganese

Mn

silicon

Si

sulfur

S

phosphorus

P

A

235

400-520

22

≤0.21

≥2.5C

≤0.5

≤0.035

≤0.035

B

≤0.21

≥0.80

≤0.35

D

≤0.21

≥0.60

≤0.35

E

≤0.18

≥0.70

≤0.35

Hull structural steel according to the quality of A, B, C, D four grades of the plate A, B grade steel plate belong to the general strength plate, the chemical composition of Mn content is very different, there is no other gap in mechanical properties, yield and tensile strength are the same, the difference is the experimental temperature of impact energy, grade A is 20 degrees, grade B is 0 degrees. Obviously, the B class is relatively better.