5754-H14 Aluminum vs. 5754-H22 Aluminum

Last Updated : Feb. 08, 2025

5754-H14 aluminum and 5754-H22 aluminum are both made from the same 5754 alloy, but they undergo different processing treatments, resulting in significant differences in mechanical properties and applications.

• The advantage of 5754-H14 is its higher hardness, tensile strength, and shear strength, making it suitable for applications that require higher strength and rigidity.
• 5754-H22 offers better ductility and fatigue strength, making it more suitable for applications that require fatigue resistance, deformability, and higher impact resistance.

The final choice of material depends on the specific requirements of the application: if higher strength and rigidity are more important, 5754-H14 is recommended; if better ductility and fatigue strength are desired, 5754-H22 would be a better choice.

5754-H14 Aluminum and 5754-H22 Aluminum Temper Differences

• 5754-H14: In the H14 temper, 5754 aluminum undergoes strain hardening but is not fully hardened. This temper provides relatively high strength, stronger than the annealed (O) state but lower than the fully hard (H18) state. This temper is suitable for applications that require moderate strength but not extreme hardness.
• 5754-H22: In the H22 temper, 5754 aluminum first undergoes strain hardening and then undergoes partial annealing. The purpose of partial annealing is to reduce hardness and increase ductility, resulting in a material with strength between the annealed (O) state and the fully hard (H28) state, approximately one-quarter of full hardness. This temper is suitable for applications that require better ductility and fatigue strength.

5754-H14 Aluminum vs. 5754-H22 Aluminum Mechanical Properties

• Brinell Hardness: 5754-H14 has a higher hardness due to stronger strain hardening treatment. In contrast, 5754-H22 has a lower hardness because it undergoes partial annealing, which reduces its hardness. The difference in hardness means that 5754-H14 aluminum alloy generally performs better in wear resistance and resistance to deformation.
• Elongation at Break: 5754-H22 has better ductility, with a significantly higher elongation at break compared to 5754-H14. This makes 5754-H22 aluminum alloy more advantageous in applications that require large deformation or impact absorption, such as in structural components.
• Fatigue Strength: Although 5754-H14 excels in many mechanical properties, 5754-H22 has slightly higher fatigue strength. This makes 5754-H22 more suitable for applications that require resistance to cyclic loads or repeated stresses, such as some automotive or structural components.
• Tensile Strength (Ultimate): 5754-H14 has higher ultimate tensile strength than 5754-H22, meaning it can withstand greater tensile loads without breaking. This property makes 5754-H14 more suitable for applications that require high tensile strength, such as aerospace, shipbuilding, and other structural components.
• Tensile Strength (Yield): 5754-H14 has a higher yield tensile strength, indicating that it can withstand greater stress without permanent deformation. This makes 5754-H14 more durable under high-load conditions, suitable for applications that require strength and rigidity.
• Shear Strength: Compared to 5754-H22, 5754-H14 has higher shear strength. This means it is more stable when subjected to shear forces, making it suitable for mechanical parts or structures that need to withstand shear stress.

5754-H14 Aluminum and 5754-H22 Aluminum Comprehensive Performance Comparison

The main advantage of 5754-H14 is its higher hardness, tensile strength, and shear strength, making it suitable for environments that require higher rigidity and strength. For example, in aerospace, transportation, and industrial machinery, it can provide strong structural support and durability.

5754-H22, on the other hand, has better ductility and fatigue strength, making it more suitable for applications that require higher elongation and fatigue resistance, such as in lightweight structures, ships, and automotive components.

5754-H14 Aluminum vs. 5754-H22 Aluminum Applications

• 5754-H14 Aluminum Alloy: Due to its higher strength and hardness, it is widely used in fields that require high rigidity and strength, such as shipbuilding structures, aircraft components, transportation equipment, and machinery.
• 5754-H22 Aluminum Alloy: Due to its better ductility and fatigue strength, it is commonly used in automotive, shipbuilding structural components, large-scale buildings, and particularly in applications that require resistance to fatigue failure and have a certain level of ductility.

5754-H14 Aluminum Alloy Applications

5754-H14 aluminum alloy, due to its higher strength and hardness, is particularly suitable for applications that require high rigidity and strength. In shipbuilding, 5754-H14 is commonly used for hulls and bulkheads, which need to resist external impacts and corrosion. Its excellent tensile strength and hardness make it perform exceptionally well in harsh environments, effectively enhancing the durability and reliability of ships. In aircraft components, 5754-H14 aluminum alloy is often used to manufacture structural parts like wing frames, fuselage shells, and landing gear, which need to support heavy loads while maintaining a light weight. For transportation equipment such as trains, trucks, and subways, 5754-H14 aluminum alloy can be used for body and chassis components, providing sufficient strength to withstand high-pressure working conditions in harsh environments. In machinery, 5754-H14 is widely used in pressure vessels and mechanical parts, ensuring stable operation and durability under high loads due to its high hardness and tensile strength.

5754-H22 Aluminum Alloy Applications

5754-H22 aluminum alloy, due to its better ductility and fatigue strength, is suitable for applications that require good elongation and resistance to repeated loads. In the automotive industry, 5754-H22 is widely used in car bodies, frames, and chassis components, providing good formability and fatigue resistance while maintaining high strength, ensuring that vehicles can resist fatigue failure over long periods of use. In shipbuilding, 5754-H22 aluminum alloy is used for manufacturing hulls, decks, and cabin structures, which not only need to be corrosion-resistant and strong but also need to withstand repeated vibrations and impacts in marine environments. For large-scale buildings, particularly structural components that require extensive welding and can bear dynamic loads, the good ductility and fatigue strength of 5754-H22 make it an ideal choice, as it can effectively handle structural deformation while maintaining a long service life. Due to its excellent fatigue strength, 5754-H22 is also suitable for various high-demand engineering projects, especially in places where some ductility is required, such as bridge construction, building frames, and other structures bearing dynamic loads.

Further reading: 5456 5454 5754 Marine Grade Aluminum Bar 5754 Marine Grade Aluminum Plate Sheet Marine Grade Aluminum Round Bar 5754 5454 5456

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