LR Grade DH62 is a very high-strength, TMCP or quenched and tempered steel plate certified by LR. This steel is engineered for the most critically stressed structural components in modern shipbuilding and offshore engineering, offering an exceptional strength-to-weight ratio for maximum weight reduction and payload optimization.
Good Low-Temperature Toughness: As a Grade D steel, DH62 guarantees reliable impact toughness at temperatures down to -20°C / -4°F. This makes it suitable for global shipping routes and operations in cold waters.
Advanced Weldability: Despite its high strength, the steel is produced with a carefully controlled chemical composition (and often in the TMCP condition) to ensure a low Carbon Equivalent. This facilitates good weldability, though it may require more specific welding procedures than lower-strength grades to preserve the properties in the heat-affected zone.
Chemical Composition
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LR DH62 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 DH62 |
0.20 |
0.55 |
1.70 |
0.030 |
0.030 |
0.015 |
0.020 |
|
Nb |
V |
Ti |
Cu |
Cr |
Ni |
Mo |
|
|
0.02-0.05 |
0.03-0.10 |
0.02 |
|
|
|
|
|
Mechanical Property
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LR DH62 extra high 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 |
|
|
LR DH62 |
mm |
Min Mpa |
Mpa |
Min % |
-20 |
J |
J |
|
t≤50 |
620 |
720-890 |
17% |
41 |
62 |
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|
50＜t≤70 |
620 |
720-890 |
17% |
41 |
62 |
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|
70＜t≤100 |
620 |
720-890 |
17% |
41 |
62 |
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|
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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