Aluminum Coil Metal Slitting and Toll Processing

aluminum 7021 - coil slitting

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.

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

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

Rockwell
B

Ultimate shearing strength MPA
(ksi)

Endurance Limit
Mpa
(ksi)

Modulus
Of Elasticity
X 103
MPa (ksi)

7021-0
7021-T61

185 (27) 140 (20)
430 (62) 380 (55)

18
13

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71

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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.