With alloy elements especially the element Nickel,DNV E550 shipbuilding steel plate can bear the weather corrosion when using to build ships and vessels. When rolling DNV Grade E550 steel plate,the steel should be chosed as full killed and Quenching and tempering heat treatment have to be done when the steel billets finished.Low temperature impacting test should be made under minus 40 centigree.
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
Chemical Composition
|
DNV E550 extra high Strength Chemical Composition |
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|
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al |
N |
|
|
DNV E550 |
0.20 |
0.10-0.55 |
1.7 |
0.030 |
0.030 |
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 |
|
|
|
Mechnical property
|
DNV E550 extra high general strength property |
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|
Grade |
|
Mechanical Property |
Charpy V Impact Test |
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|
Thickness |
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
|
|
DNV E550 |
mm |
Min Mpa |
Mpa |
Min % |
-40 |
J |
J |
|
t≤50 |
550 |
670-830 |
16% |
37 |
55 |
||
|
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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