Introduction
LR DH46 is high-strength steel plates specifically designed for marine applications. These grades of steel are widely used in the construction of ships and offshore structures due to their excellent mechanical properties and corrosion resistance. In this article, we will delve into the chemical composition, mechanical properties, heat treatment status, dimensional range, impact testing, primary application scenarios.
Chemical Composition
The chemical composition of LR DH46 steel plates is carefully tailored to ensure optimal performance in marine environments. Both grades contain carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), and other alloying elements like nickel (Ni) and chromium (Cr). The precise balance of these elements ensures high strength, weldability, and corrosion resistance.
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LR DH46 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 DH46 |
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 |
|
|
|
|
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Mechanical Properties
The mechanical properties of LR DH46 and steel plates are impressive. The exhibit high yield strength and tensile strength, making them suitable for demanding applications where structural integrity is crucial. Additionally, these steel plates possess good ductility and toughness, enabling them to absorb energy without fracturing under impact loads.
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LR DH46 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 DH46 |
mm |
Min Mpa |
Mpa |
Min % |
-20 |
J |
J |
|
t≤50 |
460 |
570-720 |
19% |
31 |
46 |
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50＜t≤70 |
460 |
570-720 |
19% |
31 |
46 |
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|
70＜t≤100 |
460 |
570-720 |
19% |
31 |
46 |
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Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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Heat Treatment Status
LR DH46 steel plates are typically supplied in a normalized or controlled rolling condition. This heat treatment process removes internal stresses, improves the mechanical properties, and enhances the weldability of the steel.
Dimensional Range
The dimensional range of LR DH46 steel plates is quite versatile, catering to different requirements in shipbuilding and offshore construction. These steel plates are available in a wide range of thicknesses, widths, and lengths to suit specific project needs.
Impact Testing
To ensure the structural integrity of ships and offshore structures in extreme weather conditions, impact testing is crucial. LR DH46 steel plates undergo rigorous impact testing at specific temperatures to assess their ability to withstand impact loads without failing.
Primary Application Scenarios
LR DH46 steel plates are primarily used in the construction of ships, offshore platforms, and other marine structures that require high strength and corrosion resistance. These steel plates are well-suited for use in harsh marine environments, where they can withstand the rigors of saltwater, wave action, and other environmental factors.
