PROPERTIES OF ZINC AND ALUMINIUM ALLOYS

TYPICAL MECHANICAL PROPERTIES

ALLOY ZAMAK 3 ZAMAK 7 ZA-8 ZA-12 ZA-27 A360 A380 A383
Tensile Strength  
(psi x 10)
41 41 54 58 61 46 47 45
Yield Strength  
(0.2% offset)  
(psi x 10)
- - 42 46 53 25 24 22
Elongation  
(% in 2")
10 13 8 6 2.75 5.0 3.5 3.5
Shear Strength  
(psi x 10)
31 31 40 43 47 29 30 -
Hardness  
(Brinell)
82 80 105 105 115 75 80 75

 

 

PHYSICAL PROPERTIES
ALLOY ZAMAK 3 ZAMAK 7 ZA-8 ZA-12 ZA-27 A 360 A 380 A 383
Density  
(lb./cu. in)
0.240 0.240 0.227  0.218 0.181 0.095 0.098 0.098
Melting Point (F) 728 727 759 810 903 1105 1100 1080
Electrical Conductivity (%IACS) 27 26 28 28 30 30 20 20
Coefficient of Thermal Expansion  
(68-212F)  
(U in/in/F)
15.2 15.2 12.9 13.4 14.4 11.6 12.2 11.5
Die Shrinkage  
(in/in)
0.005 0.005 0.007 0.007 0.008 0.005 0.005 0.005
 

CHEMICAL SPECIFICATIONS (Per ASTM) (% by weight)
ALLOY Zamak 3  Zamak 7 ZA-8 ZA-12 ZA-27 A 360 A 380 A 383
Al 3.9-4.3 3.9-4.3 8-8.3 10.5-11.5 25-28 Balance Balance Balance
Mg .02-.05 .01-.02 .015-.030 .015-.030 .010-.020 .6 .1 .1
Cu .10 .75-1.25 .8-1.3 .5-1.25 2-2.5 .4 Max 3-4 3-4
Fe .075 .050 .075 .075 .075 2 Max 2 Max 1.3 Max
          Ni
-
.005-020
-
-
-
.5
.5
.3
Cd .003 .002 .003 .003 .003 - - -
Si .003 .003 .003> .003 .003 9-10 7.5-9.5 10.5-12
Mn - - - - - .35 .5 Max .5 Max
Pb
.004
.002
.004
.004
.004
-
-
-
Zn Balance Balance Balance Balance Balance .5 Max 3 Max 3 Max

 

BARDANE MANUFACTURING COMPANY
P.O. Box 70
Delaware Street
Jermyn, PA 18433

Phone: 570.876.4844
Fax: 570.876.1938
e-mail: george_garrick@bardane.com

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