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RINA (Registro Italiano Navale) steel plates are categorized into various grades based on their strength and application, ensuring they meet the rigorous demands of marine and structural engineering. Under General Strength, grades such as RI/A, RI/B, RI/D, and RI/E are commonly utilized, providing adequate toughness and weldability for standard shipbuilding applications. These grades are suitable for hull structures, decks, and bulkheads, making them essential for various marine constructions.



In the High Strength category, grades like RI/A32, RI/D32, RI/E32, and RI/F32 offer enhanced strength and toughness for more demanding applications. This includes critical ship components and structural elements that require additional durability. Higher grades, such as RI/A36, RI/D36, RI/E36, and RI/F36, continue this trend, providing increased strength for harsher marine environments. The Extra Strength category features robust grades like RI/A500, RI/D500, RI/E500, and RI/F500, which are designed for extreme conditions and heavy-duty applications. These grades are essential in offshore structures and vessels where reliability and performance are paramount.



Further extending this range are the RI/A550, RI/D550, RI/E550, and RI/F550 grades, providing superior strength and performance for the most challenging environments. The lineup continues with the RI/A620, RI/D620, RI/E620, and RI/F620 grades, which offer ultra-high strength suitable for critical marine applications and large-scale structures. Lastly, RI/A690, RI/D690, RI/E690, and RI/F690 are among the strongest, ensuring safety and durability in the most demanding conditions. Overall, RINA steel plates are crucial in enhancing the structural integrity and longevity of marine constructions.


Grade Category Description
RI/A General Strength Standard structural grade for shipbuilding
RI/B General Strength Improved strength over RI/A
RI/D General Strength Increased toughness for colder environments
RI/E General Strength Higher toughness for extreme conditions
RI/A32 High Strength High-strength steel for marine applications
RI/D32 High Strength High strength with additional toughness
RI/E32 High Strength Enhanced toughness for severe conditions
RI/F32 High Strength Strengthened grade for critical components
RI/A36 High Strength Suitable for more demanding structural components
RI/D36 High Strength Commonly used in shipbuilding
RI/E36 High Strength Combines strength and toughness for harsh conditions
RI/F36 High Strength High durability in high-stress areas
RI/A40 High Strength The strongest in the A series
RI/D40 High Strength Offers maximum strength for demanding applications
RI/E40 High Strength Designed for extreme environments
RI/F40 High Strength Highest strength in the F series
RI/A420 High Strength Ultra-high strength for demanding applications
RI/D420 High Strength Equivalent to A420 with enhanced toughness
RI/E420 High Strength Suitable for critical marine components
RI/F420 High Strength Combines high strength and excellent toughness
RI/A460 High Strength Very high strength for severe service conditions
RI/D460 High Strength Strength and toughness for critical components
RI/E460 High Strength Suitable for extreme conditions
RI/F460 High Strength High durability in harsh environments
RI/A500 Extra Strength High-strength for heavy-duty applications
RI/D500 Extra Strength Very high strength for demanding structural needs
RI/E500 Extra Strength Suitable for extreme marine conditions
RI/F500 Extra Strength Excellent strength and toughness for critical use
RI/A550 Extra Strength Ultra-high strength for severe applications
RI/D550 Extra Strength Very high strength for extreme conditions
RI/E550 Extra Strength Critical components in harsh environments
RI/F550 Extra Strength Superior strength and toughness
RI/A620 Extra Strength For the most demanding structural applications
RI/D620 Extra Strength Ultra-high strength for large marine components
RI/E620 Extra Strength Designed for critical offshore structures
RI/F620 Extra Strength High strength for extreme conditions
RI/A690 Extra Strength Highest strength in the A series
RI/D690 Extra Strength Very high strength for demanding applications
RI/E690 Extra Strength Maximum durability and toughness for critical use
RI/F690 Extra Strength Exceptional performance in severe environments



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