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aluminum 7021 - coil slitting
Aluminum Coil Stock Supplier
7021
AUTOMOTIVE BODY SHEET AND BUMPER ALLOY
This alloy uses zinc as its major alloying element and when coupled with a smaller percentage of magnesium, the result is a very high strength, heat-treatable alloy. Applications are usually automotive bumpers and bumper reinforcements.
chemical composition limits (%)
Silicon
Si
Iron
Fe
Copper
Cu
Manganese
Mn
Magnesium
Mg
Chromium
Cr
Nickel
Ni
Zinc
Zn
Titanium
Ti
Others
Each
Total
Aluminum
Min
0.25
0.4
0.25
0.1
1.2-1.8
0.05
0.08-0.18Zr
0.10
0.05
0.15
Remainder
mechanical property Limits
tension
hardness
shear
fatigue
modulus
alloy and temper
Strength
mpa ksi
Elongation %
Ultimate Yield
1.6mm thick
specimen
50mm
12.50 mm
Diameter Specimen
4D 5D
Brinell Number 500 kg load 10 mm ball
R
ockwell
B
U
ltimate shearing strength MPA
(ksi)
Endurance Limit
Mpa
(ksi)
Modulus
Of Elasticity
X 10
3
MPa (ksi)
7021-0
7021-T61
185 (27) 140 (20)
430 (62) 380 (55)
18
13
--
--
--
--
--
71
--
--
--
--
71 (10.3)
71 (10.3)
• Chemical composition is percent maximum unless shown as a range or a minimum.
• Source: Aluminum Standards and Data – The Aluminum Association, Inc.
• Information presented as a guide for reference purposes only and is not intended to be used for product design or application.
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