NK E56 marine steel plates are specialized materials designed for use in the construction of ships and marine structures. These plates possess a unique combination of chemical composition, mechanical properties, and heat treatment states that render them suitable for the rigors of the marine environment.
Mechanically, NK E56 steel plate exhibit excellent tensile strength and yield strength, allowing them to withstand the significant loads and stresses encountered in marine applications. They also possess good elongation and impact toughness, ensuring reliable performance in extreme conditions.
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NK E56 extra strength property |
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Grade |
Mechanical Property |
Charpy V Impact Test |
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Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
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|
Min Mpa |
Mpa |
Min % |
-40 |
55 |
37 |
|
|
NK E56 |
550 |
670-830 |
16 |
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Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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In terms of chemical composition, NK E56 steel plate contain specific alloys that enhance their durability and corrosion resistance. The primary elements include carbon, silicon, manganese, phosphorus, sulfur, chromium, molybdenum, nickel, and copper, each playing a crucial role in determining the steel's overall performance. The precise balance of these elements ensures high strength, toughness, and weldability.
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NK E56 extraStrength Chemical Composition |
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Grade |
The Element Max (%) |
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C |
Si |
Mn |
P |
S |
Al |
N |
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NK E56 |
0.20 |
0.55 |
1.70 |
0.030 |
0.030 |
- |
0.020 |
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Nb |
V |
Ti |
Cu |
Cr |
Ni |
Mo |
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|
- |
- |
- |
- |
- |
- |
- |
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|
NK E56 extra strength property |
||||||
|
Grade |
Mechanical Property |
Charpy V Impact Test |
||||
|
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
|
|
Min Mpa |
Mpa |
Min % |
-40 |
55 |
37 |
|
|
NK E56 |
550 |
670-830 |
16 |
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|
Regarding dimensional range, NK E56 steel plate are available in a variety of thicknesses, widths, and lengths to meet the specific requirements of shipbuilding projects. This flexibility allows for the efficient fabrication of complex structures with minimal waste. Impact testing is a crucial part of the quality assurance process for NK E56 steel plate. These tests evaluate the material's resistance to brittle fracture at low temperatures, ensuring its reliability in cold environments. The plates typically undergo impact testing at various temperatures to ensure they meet or exceed industry standards.
The heat treatment state of the steel plate is carefully controlled to optimize their mechanical properties. Typically, the plates undergo quenching and tempering processes to achieve the desired balance between strength and toughness. This heat treatment ensures consistent performance throughout the plate's thickness and across different batches.
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Equivalent steel grade of NK E56 |
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DNV |
GL |
LR |
BV |
CCS |
NK |
KR |
RINA |
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NV E550 |
GL E550 |
LR/EH55 |
BV/E550 |
CCS/E550 |
K E56 |
R E56 |
RI E550 |
