The higher steel grade NV F550 shipbuilding steel plate are used abnormally owning to its high cost and substitutability.With the minimum yield point at 550 Mpa,and tensile strength within 670-830 Mpa,steel plate DNV F550 can bear the higher strength and used to some steel structure parts in ships.
Steel Standard:DNV
Rolling Type:Extra high strength ship plate
Thickness:6mm-250mm
Width:1500mm-4200mm
Length:3000mm-18000mm
Heat Treatment:Quenched and Tempered
DNV F550 Chemical composition heat analysis
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al |
N |
|
|
DNV F550 |
0.21 |
0.10-0.55 |
1.7 |
0.035 |
0.035 |
0.015-0.08 |
0.020 |
|
Nb |
V |
Ti |
Cu |
B |
Ni |
Mo |
|
|
0.02-0.05 |
0.04-0.10 |
0.02 |
0.005 |
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DNV F550 Mechanical properties
Grade |
Mechanical Property |
Charpy V Impact Test |
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|
Thickness |
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
|
|
DNV F550 |
mm |
Min Mpa |
Mpa |
Min % |
0 |
J |
J |
|
t≤50 |
550 |
670-830 |
16% |
37 |
55 |
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|
50＜t≤70 |
550 |
670-830 |
16% |
37 |
55 |
||
|
70＜t≤150 |
550 |
670-830 |
16% |
37 |
55 |
||
|
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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