1. Chemical Composition of 3003 Aluminum Bar (by Mass Percentage)

Aluminum (Al): Balance (~98.6%–99.3%)

Primary Alloying Element:
Manganese (Mn): 1.0%–1.5% (key strengthening element)

Impurity Elements (maximum allowable content):
Iron (Fe): ≤0.7%
Silicon (Si): ≤0.6%
Copper (Cu): ≤0.05%–0.20% (varies slightly by standard)
Zinc (Zn): ≤0.10%
Other Elements (individual): ≤0.05%, Total: ≤0.15%

Standards: ASTM B221, GB/T 3190, EN 573-3, etc.

2. Mechanical Properties (Different Tempers)

3003 aluminum gains significant strength through work hardening (H tempers). Key properties for common tempers are as follows:

Temper Tensile Strength (MPa) Yield Strength (MPa) Elongation (% in 50mm)

O (Annealed) 95 - 130 35 - 50 25 - 35

H12 130 - 160 110 - 140 8 - 12

H14 150 - 185 135 - 165 5 - 10

H18 180 - 210 170 - 195 2 - 4

Notes:

Cold-worked tempers (e.g., H18) significantly increase strength but reduce ductility.

Specific values may vary slightly due to production processes (e.g., rolling, extrusion) and testing standards.

3. Physical Properties

Density: 2.73 g/cm³ (slightly higher than pure aluminum 1xxx series)
Electrical Conductivity: ~40% IACS (lower than pure aluminum due to manganese content)
Thermal Conductivity: ~190 W/(m·K)
Melting Point: ~655°C
Corrosion Resistance: Excellent, particularly resistant to atmospheric corrosion and mild acidic environments (manganese enhances oxide film stability).