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1100 Aluminum Specification

Aluminum 1100 is soft, low strength and is considered the most commercially pure aluminum alloy, composed of 99.6% aluminum. Copper, iron, magnesium, manganese, silicon, titanium, vanadium and zinc comprise the remaining 0.4%. It cannot be hardened by heat treatment, but is very weldable and formable. Cold working is the most common way to form aluminum 1100. Therefore, it may be shaped into many different products, including chemical equipment, railroad tank cars, fin stock, dials, name plates, cooking utensils, rivets, reflectors and sheet metal. The plumbing and lighting industries also use aluminum 1100.

It is manufactured a wide variety of different ways, but may only be hardened by cold working. Aluminum 1100 is the softest form of aluminum and therefore is not used for high-strength or high-pressure applications. Pure aluminum is able to be hot worked or cold worked, and is forged anywhere from 700 to 950 degrees F. Aside from forging, it is shaped by spinning, stamping and drawing.

These process produce aluminum shapes in the form of foil, plates, round bars or rods, metal sheets, strips and wire. Resistance welding is possible, but may take many tries to obtain good results. It has 55% the electrical conductivity of copper.

Principal Design Features
This is a relatively low strength, essentially pure aluminum, alloy. It is noted for excellent welding characteristics and formability along with good corrosion resistance. It cannot be hardened by heat treatment.

Commonly used in the manufacture of chemical equipment and railroad tank cars.

The machinability of AL 1060 is fair to poor, especially in the soft temper conditions. In the harder (cold worked) tempers such as H16 and H18 the machining characteristics are improved. Either carbide or high-speed steel tooling may be used and use of lubricants is recommended, although some cutting may be done dry.

This alloy has excellent forming capability by cold or hot working with commercial techniques.

AL 1060 may be welded by standard commercial methods. If filler rod is required it should be of AL 1060. A precaution should be noted for the use of resistance welding as by this method some trial and error experimentation may be required to obtain good results.

Heat Treatment
This alloy does not harden by heat treatment. It may be annealed after cold working. See "Annealing".

This alloy may be forged in the temperature range of 950 to 700 F.

Hot Working
Hot working, if required, may be done in the range of 900 to 500 F.

Cold Working
The cold working characteristics of AL 1060 are excellent. It can readily be cold worked by all conventional methods.

Annealing may be done at 650 F followed by air cooling.

The alloy hardens only from cold working. Tempers H12, H14, H16, H18 are determined by the amount of cold working imparted into the alloy.

Other Physical Props
Electrical conductivity 55% of copper.

Other Mechanical Props
Shear strength of annealed (O temper) is 7 ksi. For H14 temper it is 9 ksi and for H18 temper 11 ksi.

Chemical Composition

Aluminum 99.6 min
Copper 0.05 max
Iron 0.35 max
Magnesium 0.03 max
Manganese 0.03 max
Remainder Each 0.03 max
Silicon 0.25 max
Titanium 0.03 max
Vanadium 0.05 max
Zinc 0.05 max

Mechanical Properties
Properties Conditions
T (°C) Treatment
Density (x1000 kg/m2 2.71 25  
Poisson's Ratio 0.33 25  
Elastic Modulus (GPa) 70-80 25  
Tensile Strength (Mpa) 110 25 H12
Yield Strength (Mpa) 105
Elongation (%) 12
Reduction in Area (%)  
Hardness (HB500) 28 25 H12
Shear Strength (MPa) 69 25 H12
Fatigue Strength 41 25 H12

Thermal Properties
Properties Conditions
T (°C) Treatment
Thermal Expansion (10 -5/C°) 23.6 20-100  
Thermal Conductivity (W/m-K) 218 25 H18

Electric Properties
Properties Conditions
T (°C) Treatment
Electric Resistivity (10 -9 O-m) 30 25 H18

AA 1100
Conditions Tensile Properties
T (°C) Treatment
25 H12 Tensile Strength (MPA) 110
Yield Strength (MPa) 105
Elongation (%) 12
Reduction in Area (%)  
25 H14 Tensile Strength (MPA) 125
Yield Strength (MPa) 115
Elongation (%) 9
Reduction in Area (%)  
25 H16 Tensile Strength (MPA) 145
Yield Strength (MPa) 140
Elongation (%) 6
Reduction in Area (%)  
25 H18 Tensile Strength (MPA) 165
Yield Strength (MPa) 150
Elongation (%) 5
Reduction in Area (%)  
25 0 Tensile Strength (MPA) 90
Yield Strength (MPa) 34
Elongation (%) 35
Reduction in Area (%)  

Physical Data : [top]
Density (lb / cu. in.) 0.0975
Specific Gravity 2.705
Melting Point (Deg F) 1200
Modulus of Elasticity Tension 10
Modulus of Elasticity Torsion 3.85

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