Common Tempers of 5083 Aluminum Plate
Common tempers of 5083 aluminum plate include H111, H112, H116 and H321, each offering distinct performance characteristics to meet different application requirements. As a 5xxx series aluminum-magnesium alloy, 5083 is widely used in shipbuilding and yacht manufacturing, particularly for medium and thick aluminum plates. Its different tempers are designed to provide specific mechanical and corrosion-resistant properties depending on the intended use.
5083 H111 Aluminum Plate
The H111 temper is moderately work hardened after annealing, offering balanced strength and corrosion resistance. It is suitable for applications where extreme mechanical performance is not required but corrosion resistance remains important. Typical uses include hull structures, cabins and other components that are exposed to marine environments but do not bear heavy loads.
5083 H112 Aluminum Plate
The H112 temper provides higher strength and is ideal for applications that demand greater structural integrity. It is commonly used for hot-rolled plates in free processing conditions and suits parts that require higher load-bearing capacity, such as main hull structures, frames and other critical components. It also offers good machinability for extensive processing.
5083 H116 and H321 Aluminum Plates
The H116 temper is specifically designed for 5xxx alloys with high magnesium content of at least 4.0 percent, offering excellent corrosion resistance for harsh marine environments and often used in hull shells and components below the waterline. The H321 temper undergoes rigorous work hardening, providing high strength and corrosion resistance for structural components that must endure heavy loads and demanding conditions, such as thick hulls and high-load structural parts.
Chemical Composition and Mechanical Properties
The nominal composition of 5083 marine plate includes magnesium 4.0 to 4.9 percent, manganese 0.40 to 1.0 percent, silicon up to 0.40 percent, copper up to 0.10 percent, chromium 0.05 to 0.25 percent and iron up to 0.40 percent, with single impurities limited to 0.05 percent and total to 0.15 percent. Typical mechanical values for 3.00 to 50.00 mm plate are: O and H111 temper tensile strength 275 to 350 MPa with yield at least 125 MPa and elongation at least 16 percent; H116 tensile at least 305 MPa with yield at least 215 MPa and elongation at least 10 percent; H321 tensile 305 to 385 MPa with yield at least 215 MPa and elongation at least 12 percent; H112 tensile at least 275 MPa with yield at least 125 MPa and elongation at least 12 percent.
How to Choose the Right Temper for Shipbuilding
Select H111 when a balance of strength and corrosion resistance is needed without extreme mechanical properties. Choose H112 when higher strength is necessary while maintaining corrosion resistance and good machinability for load-bearing hull structures and frames. Use H116 where excellent corrosion resistance is critical, especially below the waterline in harsh saltwater. Select H321 to maintain high strength and durability under demanding conditions for critical structural parts and heavy hulls. Consider the environment, load requirements and machining needs when deciding, and confirm that the material is certified by the relevant classification societies.
FAQ
Q: What tempers are common for 5083 ship plate?
A: The common tempers are H111, H112, H116 and H321, each with a different balance of strength, corrosion resistance and load capacity.
Q: Which 5083 temper is best below the waterline?
A: H116 is designed for high-magnesium 5xxx alloys with excellent exfoliation corrosion resistance and is often used for hull shells below the waterline.
Q: What is the difference between H111 and H112?
A: H111 is moderately work hardened after annealing with balanced properties, while H112 is used for hot-rolled plates with higher strength for load-bearing structures.
Q: What is the tensile strength of 5083 H321?
A: Typical tensile strength is 305 to 385 MPa with yield strength of at least 215 MPa and elongation of at least 12 percent.
Q: Which temper should I choose for heavy structural parts?
A: H321 or H112 are preferred for heavy loads; H321 combines high strength with good corrosion resistance for demanding structural duty.
