3005-H18 aluminum is a special temper of the 3005 aluminum alloy, primarily used in applications requiring moderate strength and excellent corrosion resistance. The "H18" temper indicates that it has undergone extensive cold working (strain hardening) to achieve a high-strength strain-hardened alloy. This is typically accomplished through mechanical processes such as rolling or drawing, without the need for any heat treatment.
Like other 3000 series alloys, 3005 H18 aluminum has outstanding corrosion resistance, especially in atmospheric and marine environments. The presence of manganese (Mn), the primary alloying element, enhances its corrosion resistance. Manganese forms a protective oxide layer on the surface, making it highly resistant to rust and corrosion.
3005 H18 aluminum is a highly strain-hardened material, offering higher strength, fatigue resistance, and durability compared to lower-temperature similar materials. Although it has moderate formability and is not as easily shaped as other alloys, its higher strength and fatigue resistance make it an excellent choice for structural and load-bearing applications, especially in corrosive environments. Due to its unique combination of properties, it is widely used in construction, automotive, and industrial fields.
| Element | 3005-H18 Aluminum |
| Aluminum (Al), % | 95.7 to 98.8 |
| Chromium (Cr), % | 0 to 0.1 |
| Copper (Cu), % | 0 to 0.3 |
| Iron (Fe), % | 0 to 0.7 |
| Magnesium (Mg), % | 0.2 to 0.6 |
| Manganese (Mn), % | 1.0 to 1.5 |
| Silicon (Si), % | 0 to 0.6 |
| Titanium (Ti), % | 0 to 0.1 |
| Zinc (Zn), % | 0 to 0.25 |
| Residuals, % | 0 to 0.15 |
| Property | 3005-H18 Aluminum |
| Brinell Hardness | Higher hardness |
| Elastic Modulus | 10 x 10⁶ psi |
| Elongation at Break | Lower elongation |
| Fatigue Strength | Higher fatigue strength |
| Shear Strength | Higher shear strength |
| Tensile Strength (Ultimate) | Higher tensile strength |
| Tensile Strength (Yield) | Higher yield strength |
| Resilience (Unit Rupture Work) | 4.1 MJ/m³ |
| Modulus of Resilience | 370 kJ/m³ |
| Strength-to-Weight Ratio (Axial) | 25 points |
| Strength-to-Weight Ratio (Bending) | 32 points |
| Property | 3005-H18 Aluminum |
| Latent Heat of Fusion | 400 J/g |
| Maximum Temperature (Mechanical) | 360°F |
| Melting Onset (Solidus) | 1180°F |
| Melting Completion (Liquidus) | 1210°F |
| Thermal Conductivity | 93 BTU/h-ft-°F |
| Thermal Expansion | 23 µm/m-K |
| Property | 3005-H18 Aluminum |
| Electrical Conductivity (Equal Volume) | 42% IACS |
| Electrical Conductivity (Equal Weight) | 140% IACS |
| Application Area | Description |
| High Strength and Moderate Formability | 3005 H18 aluminum achieves high strength through strain hardening, making it suitable for components subject to structural loads. It is widely used in construction materials, supports, bridge components, and other areas where structural stability and high strength are required. Although its formability is moderate, its strength makes it perform excellently in situations that do not require excessive flexibility. |
| Durability under Cyclic Loading | Due to its high fatigue strength, 3005 H18 aluminum is ideal for environments subjected to repeated loading. For example, automotive body components, construction materials, and roofing panels that experience frequent vibrations and loads can maintain strength with 3005 H18 aluminum, preventing fatigue fractures from repeated loading and ensuring its durability. |
| Corrosion Resistance | 3005 H18 aluminum has excellent corrosion resistance, making it suitable for marine environments, chemical processing, and appliance manufacturing. It can be used for extended periods in saltwater, moisture, and chemically corrosive environments, commonly found in corrosion-resistant marine equipment, chemical processing facilities, and the external structures of household appliances, extending the product's lifespan. |
| Industrial and Consumer Goods | Due to its excellent corrosion resistance and adequate strength, 3005 H18 aluminum is widely used in components such as air conditioning systems, refrigerators, heat exchangers, and decorative panels. It remains stable in humid, high-temperature, or chemically corrosive environments, making it suitable for appliances and industrial equipment that require long-term durability and appearance retention. |
| Property | 3005-H18 Aluminum |
| Base Metal Price | 9.5% |
| Density | 170 lb/ft³ |
| Embodied Carbon | 8.2 kg CO₂/kg |
| Embodied Energy | 66 x 10³ BTU/lb |
| Embodied Water | 140 gal/lb |
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