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General Strength KR steel plates are primarily used in shipbuilding and related industries. They offer adequate strength for constructing hulls and other essential ship parts. The grades in this category include RA grades such as RA32, RA36, RA40, RA43, RA47, and RA51. Each of these grades is defined by its tensile strength and load-bearing capacity, making them suitable for standard marine applications.



On the other hand, Extra Strength KR plates are designed to provide higher structural integrity under intense stress conditions, often needed for the construction of larger or more demanding vessels. The grades here include RA56, RA63, RA70, as well as RB and RD plates such as RD32, RD36, RD43, RD47, and RD51. These grades are engineered for additional toughness and resilience.



Additionally, RE and RF grades such as RE32, RE36, RF36, RE40, RF40, and up to RE70, RF70, fall into this extra strength category. These plates are ideal for the construction of ships that need to operate in harsher marine environments, providing additional resistance to impact and fatigue. This classification helps manufacturers and engineers choose the right material for their projects, ensuring both safety and efficiency.


Grade Category Description
R A32 General Strength Basic structural steel for shipbuilding applications.
R A36 General Strength Higher strength suitable for standard marine applications.
R AH40 General Strength High toughness and strength for critical marine structures.
R A43 General Strength Enhanced structural strength for shipbuilding.
R A47 General Strength Additional strength for moderate marine environments.
R A51 General Strength High structural integrity for shipbuilding.
R A56 Extra Strength Extra-high strength for demanding marine applications.
R A63 Extra Strength Superior strength for high-stress marine environments.
R A70 Extra Strength Outstanding strength for severe operational conditions.
R B32 Extra Strength Enhanced toughness for cold marine conditions.
R D32 Extra Strength Improved strength for harsh environmental applications.
R D36 Extra Strength Enhanced toughness for structural components in extreme conditions.
R DH40 Extra Strength High toughness for demanding structural applications.
R D43 Extra Strength Higher strength than R D36 for harsher environments.
R D47 Extra Strength Additional strength for high-stress environments.
R D51 Extra Strength Extra strength for severe operational conditions.
R D56 Extra Strength Superior toughness for critical marine structures.
R D63 Extra Strength Enhanced durability for extreme operational environments.
R D70 Extra Strength High structural strength for the most demanding conditions.
R E32 Extra Strength High toughness and good weldability for marine applications.
R F32 Extra Strength Combines strength and toughness for shipbuilding.
R E36 Extra Strength High strength with good weldability for shipbuilding.
R F36 Extra Strength Excellent strength and toughness for heavy-duty applications.
R EH40 Extra Strength Extra toughness for extreme marine conditions.
R FH40 Extra Strength Superior durability for critical shipbuilding applications.
R E43 Extra Strength High strength with enhanced impact resistance for severe applications.
R F43 Extra Strength Combines strength and toughness for harsh environments.
R E47 Extra Strength High strength for critical marine components.
R F47 Extra Strength Designed for high-stress marine applications.
R E51 Extra Strength High strength with excellent weldability for marine structures.
R F51 Extra Strength Strong and durable for critical structural applications.
R E56 Extra Strength Combines high strength with excellent impact resistance.
R F56 Extra Strength Suitable for the most demanding marine applications.
R E63 Extra Strength Excellent strength and weldability for critical marine structures.
R F63 Extra Strength High durability for extreme marine conditions.
R E70 Extra Strength Extremely high strength for severe environments.
R F70 Extra Strength Exceptional strength for the most critical marine applications.



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