2024 Aluminum Alloy

The following specifications cover 2024 Aluminum:

  • AMS 4037
  • AMS 4120
  • AMS 4192
  • AMS 7223
  • ASTM B209
  • ASTM B210
  • ASTM B211
  • ASTM B221
  • ASTM B241 (Pipe- Seamless)
  • ASTM B316
  • ASTM F467 (Nuts)
  • ASTM F468 (Nuts)
  • DIN 3.1355
  • MIL B-6812
  • MIL T-15089
  • MIL T-50777
  • QQ A-200/3
  • QQ A-225/6
  • QQ A-250/4
  • QQ A-430
  • QQ WW-T-700/3
  • SAE J454

Property Results

S

AluminumBalance
Chromium0.1 max
Copper3.8 – 4.9
Iron0.5 max
Magnesium1.2 – 1.8
Manganese0.3 – 0.9
Remainder Each0.05 max
Remainder Total0.15 max
Silicon0.5 max
Zinc0.25 max
Principal Design FeaturesAn age hardening, high strength aluminum alloy. Useful for optimum strength to weight ratio structures.
ApplicationsCommonly used in the manufacture of truck wheels, aircraft structures, and screw machine products, scientific instruments, veterinary and orthopedic braces and equipment, and in rivets.
MachinabilityThe machining characteristics of AL 2024 are fair in the heat treated condition, which is the condition in which most machining is done. Machinability in the annealed condition is good. Use of oil lubricants is recommended for all machining operations.
FormingThe alloy may be formed by conventional methods, except that hot forming should be avoided – see “Hot Working”.
WeldingWelding may be done by use of resistance welding or inert gas consumable electrode arc method. However it must be noted that, in general, welding by any means is NOT recommended for this alloy because of the degradation of corrosion resistance that occurs as a result of weld heat. A repeat heat treatment should be done if welded.
Heat TreatmentThis is an age-hardening alloy and responds to heat treatment to accomplish the strengthening (aging). See “Annealing” and ” Aging”. The T4 condition is attained by a 920 F heating followed by cold water quench and aging at room temperature. T6 by the same 920 F and quench followed by 375 F for 10 hours and air cooling.
Hot WorkingHot forming should be avoided if possible because of the harmful effect of heating upon corrosion resistance. If, for example, T4 condition is hot worked it is the necessary to age the part to the T6 condition to restore corrosion resistance.
ForgingThe alloy may be forged. However subsequent heat treatment is necessary in order to retain reasonable corrosion resistance.
Cold WorkingCold working of this alloy is readily done by conventional methods. Ductility In the annealed condition is best and bend radii of 1/2 to 1 times thickness are possible for sheet 1/4 ” thick, or thinner. For T3 or T4 conditions bend radii of 5 to 6 times thickness are required.
AnnealingAnnealing is done at 750 to 800 F for at least 2 hours at temperature, followed by slow cooling in the furnace. This will anneal the alloy from a heat treated condition. Annealing between cold work operations may be done at 650 F for 2 hours, followed by air cooling.
AgingThe T4 condition is attained by a 920 F heating and cold water quench. Aging then occurs at room temperature. For T6 condition use the same 920 F and water quench procedure then reheat to 375 F for 10 hours and air cool. Other conditions are a result of the T4 condition followed by controlled amounts of cold working.
TemperingNot applicable to this alloy.
HardeningHardening, or strengthening, occurs from a solution anneal and aging at room temperature or varying amounts of cold working.
Other Physical PropsElectrical conductivity is 35% that of copper.
Other Mechanical PropsShear strength in the annealed condition is 18 ksi. For T3 and T4 condition it is much stronger, 41 ksi.
Density (lb / cu. in.)0.1
Specific Gravity2.78
Melting Point (Deg F)950
Modulus of Elasticity Tension10.6
Modulus of Elasticity Torsion4
FormPlate
ConditionT351
Temperature-320
Tensile Strength84
Yield Strength61
Elongation19

 

FormPlate
ConditionT351
Temperature-112
Tensile Strength71
Yield Strength49
Elongation19

 

FormPlate
ConditionT351
Temperature-18
Tensile Strength69
Yield Strength47
Elongation19

 

FormPlate
ConditionT351
Temperature75
Tensile Strength68
Yield Strength47
Elongation19

 

FormPlate
ConditionT351
Temperature212
Tensile Strength63
Yield Strength45
Elongation19

 

FormPlate
ConditionT351
Temperature300
Tensile Strength45
Yield Strength36
Elongation17

 

FormPlate
ConditionT351
Temperature400
Tensile Strength26
Yield Strength19
Elongation27

 

FormPlate
ConditionT351
Temperature500
Tensile Strength11
Yield Strength9
Elongation55

 

FormPlate
ConditionT351
Temperature600
Tensile Strength7.5
Yield Strength6
Elongation75

 

FormPlate
ConditionT351
Temperature700
Tensile Strength5
Yield Strength4
Elongation100

 

FormPlate
ConditionT4
Temperature-320
Tensile Strength84
Yield Strength61
Elongation19

 

FormPlate
ConditionT4
Temperature-112
Tensile Strength71
Yield Strength49
Elongation19

 

FormPlate
ConditionT4
Temperature-18
Tensile Strength69
Yield Strength47
Elongation19

 

FormPlate
ConditionT4
Temperature75
Tensile Strength68
Yield Strength47
Elongation19

 

FormPlate
ConditionT4
Temperature212
Tensile Strength63
Yield Strength45
Elongation19

 

FormPlate
ConditionT4
Temperature300
Tensile Strength45
Yield Strength36
Elongation17

 

FormPlate
ConditionT4
Temperature400
Tensile Strength26
Yield Strength19
Elongation27

 

FormPlate
ConditionT4
Temperature500
Tensile Strength11
Yield Strength9
Elongation55

 

FormPlate
ConditionT4
Temperature600
Tensile Strength7.5
Yield Strength6
Elongation75

 

FormPlate
ConditionT4
Temperature700
Tensile Strength5
Yield Strength4
Elongation100

 

FormSheet
ConditionT3
Temperature-320
Tensile Strength85
Yield Strength62
Elongation18

 

FormSheet
ConditionT3
Temperature-112
Tensile Strength73
Yield Strength52
Elongation17

 

FormSheet
ConditionT3
Temperature-18
Tensile Strength72
Yield Strength51
Elongation17

 

FormSheet
ConditionT3
Temperature75
Tensile Strength70
Yield Strength50
Elongation17

 

FormSheet
ConditionT3
Temperature212
Tensile Strength66
Yield Strength48
Elongation16

 

FormSheet
ConditionT3
Temperature300
Tensile Strength55
Yield Strength45
Elongation11

 

FormSheet
ConditionT3
Temperature400
Tensile Strength27
Yield Strength20
Elongation23
FormSheet
ConditionT3
Temperature500
Tensile Strength11
Yield Strength9
Elongation55
FormSheet
ConditionT3
Temperature600
Tensile Strength7.5
Yield Strength6
Elongation75
FormSheet
ConditionT3
Temperature700
Tensile Strength5
Yield Strength4
Elongation100