LR Grade DH55 Shipbuilding steel plate is mainly used to Shipbuilding Project and Ocean Offshore Structural Project.
LR Grade DH55 Shipbuilding Steel Plate Other Name
LR Grade DH55 Shipbuilding steel plate, LR Grade DH55 Ship steel plate, LR Grade DH55 Marine steel plate, LR Grade DH55 steel plate .
Additional Condition
UT(Ultrasonic examination), AR(As Hot Rolled only), TMCP(Thermal Mechanical Control Processing), N(Normalized), Q+T(Quenched and Tempered),Z Direction Test(Z15,Z25,Z35), Charpy V-Notch Impact Test, The Third Party Test (such as SGS Test), Coated or Shot Blasting and Painting.
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LR DH55 extra high Strength Chemical Composition |
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Grade |
The Element Max (%) |
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C |
Si |
Mn |
P |
S |
Al |
N |
|
|
LR DH55 |
0.20 |
0.55 |
1.70 |
0.030 |
0.030 |
0.015 |
0.020 |
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Nb |
V |
Ti |
Cu |
Cr |
Ni |
Mo |
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0.02-0.05 |
0.03-0.10 |
0.02 |
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Crack Sensitivity: Pcm = (C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B)%
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
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LR DH55 extra high strength property |
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Grade |
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Mechanical Property |
Charpy V Impact Test |
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Thickness |
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
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|
LR DH55 |
mm |
Min Mpa |
Mpa |
Min % |
-20 |
J |
J |
|
t≤50 |
550 |
670-830 |
18% |
37 |
55 |
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50＜t≤70 |
550 |
670-830 |
18% |
37 |
55 |
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70＜t≤100 |
550 |
670-830 |
18% |
37 |
55 |
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Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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