Aluminum alloy 3003 is a commercially pure aluminum with the addition of manganese and one of the most commonly used of all aluminum alloys. It is not heat treatable, and commonly available in flat rolled coil, sheet and plate. It has good workability and very good resistance to corrosion through the atmosphere environments.

Chemical Composition (wt. %)

UNS No. Al Mg Cr Si Fe Cu Mn Zn Ti Others (max)
min. A96061 Bal. 0.80 0.04 0.40 0.15 Each 0.05 Total 0.15
max 1.20 0.35 0.80 0.70 0.40 0.15 0.25 0.15

Main Features

1. High ductility.

2. Good corrosion resistance at atmosphere environments.

3. Moderate strength and its strength can be increased by cold working.

Main Applications

1. Building industry: roofing and sidings, acoustic ceilings, corrugated sheets. 2. Chemical and food industries: storage tanks, pipes, metal work. 3. Equipment for heating and cooling: heat exchangers, air condition evaporators,

motor vehicle radiators, freezer linings. 4. Home appliances: cooking utensils, bakery moulds. 5. Office equipment. 6. Packaging: containers, closures. Cladding alloy.

Fabrication and Heat Treatment

Aluminum 3003 alloy can be formed using conventional hot working or cold working method. Hot worked at 260 to 510°C (500 to 950°F).


Machinability of the softer tempers O and H12 is poor, with the harder tempers such as H14 and above being somewhat easier to machine.

Heat treatment: 

Alloy 3003 is not hardened by heat treatment. It can be significantly hardened by cold work and various “H” tempers are produced as well as the soft annealed Temper O condition. Alloy 3003 is usually supplied in H1x tempers. To soften alloy 3003 it can be annealed by heating to 415°C, hold until uniform temperature then cool.


Excellent weldability by all standard methods, such as gas, electric and resistance welding. GMAW and GTAW are preferred and widely used to produce structural welds. Filler alloys are usually 1100 although other alloys are possible. Welding of strain hardened tempers will reduce strengths in the heat affected zones.