Advantages of Zinc Die Castings
Creco Cast manufactures small & miniature precision zinc die castings from a wide range of zinc alloys, including Zamak 2, Zamak 3, Zamak 5, Zamak 7, and ZA-8. While hand selecting the proper alloy for your specific application may seem a daunting task, our experienced engineering oriented staff will help you make the best selection for your next zinc die casting.
A broad range of mechanical and physical properties makes zinc an attractive choice for many applications. All data on this page represents approximates and are not absolutes. Data will vary according to alloys and may vary slightly according to the varying testing methods.
| Alloy | Zinc | Aluminum | Magnesium | Bronze / Brass | Iron | ||||||
| Zamak 2 | Zamak 3 | Zamak 5 | Zamak 7 | ZA 8 | 380 | AZ-91D | SAE 660 C93200 | SAE 40 C83600 | Class 30 Gray Cast Iron | 32510 Malleable Iron | |
| Ultimate Tensile Strength: psi x 103 (MPa) | 52 (359) | 41 (283) | 48 (328) | 41 (283) | 54 (374) | 47 (324) | 34 (234) | 35 (241) | 37 (255) | 31 (214) | 50 (345) |
| Yield Strength - 0.2% Offset: psi x 103 (MPa) | NA | 32 (221) | 33 (228) | 32 (221) | 42 (290) | 24 (165) | 23 (159) | 183 (124) | 173 (117) | 18 (124) | 32 (221) |
| Elongation: % in 2" | 7 | 10 |
7 | 13 | 6-10 | 3 | 3 | 20 | 30 | nil | 10 |
| Shear Strength: psi x 103 (MPa) | 46 (317) | 31 (214) | 38 (262) | 31 (214) | 40 (275) | 27 (186) | 20 (138) | NA | NA | 43 (296) | 45 (310) |
| Hardness: Brinnel | 100 | 82 | 91 | 80 | 95-110 | 80 | 63 | 65 | 60 | 170-269 | 110-156 |
| Impact Strength: ft-lb (J) | 352 (48) | 432 (58) | 482 (65) | 432 (58) | 312 (42) | 31 (4) | 2.75 (3.7) | 64 (8) | 115 (15) | nil | 40-651 (54-88) |
| Fatigue Strength Rotary Bend - 5x108 cycles psi x 103 (MPa) | 8.5 (59) | 6.9 (48) | 8.2 (57) | 6.8 (47) | 15 (103) | 20 (138) | 14 (97) | 16 (110) | 11 (76) | 14 (97) | 28 (193) |
| Compressive Yield Strength - 0.1% Offset: psi x 103 (MPa) | 934 (641) | 604 (414) | 874 (600) | 604 (414) | 37 (252) | NA | 23 (159) | 467 (317) | 37.5 (259) | 1096 (752) | NA |
| Alloy | Zinc | Aluminum | Magnesium | Bronze / Brass | Iron | ||||||
| Zamak 2 | Zamak 3 | Zamak 5 | Zamak 7 | ZA 8 | 380 | AZ-91D | SAE 660 C93200 | SAE 40 C83600 | Class 30 Gray Cast Iron | 32510 Malleable Iron | |
| Density: lb/cu in (g/cm3) | .24 (6.6) | .24 (6.6) | .24 (6.6) | .24 (6.6) | .227 (6.3) | .098 (2713) | .066 (1827) | .322 (8913) | .318 (8802) | .25 (6920) | .26 (7198) |
| Melting Range: oF (oC) | 715-734 (379-390) | 718-728 (381-387) | 717-727 (380-386) | 718-728 (381-387) | 707-759 (375-404) | 1000-1100 (538-593) | 875-1105 (557-613) | 1570-1790 (854-977) | 1570-1850 (854-1010) | >2150 (>1177) | >2250 (>1232) |
| Electrical Conductivity: % IACS | 25 | 27 |
26 | 27 | 27.7 | 27 | 11.5 | 12 | 15 | NA | 6 |
| Thermal Conductivity: BTU/ft/hr/oF (W/m/hr/oC) | 60.5 (104.7) | 65.3 (113.0) |
62.9 (108.9) | 65.3 (113.0) | 66.3 (114.7) | 55.6 (96.2) | 41.8 (72.3) | 34 (59) | 41.6 (72) | 28-30 (48-52) | NA |
| Coefficient of Thermal Expansion 68-212oF (100-200°C) | 15.4 (27.8) | 15.2 (27.4) | 15.2 (27.4) | 15.2 (27.4) | 12.9 (23.3) | 11.8 (21.2) | 14 (25.2) | 10 (18) | 10 (18) | 6.7 (12.1) | 6.6 (11.9) |
| Specific Heat: BTU/lb/oF (J/kg/oC) | .10 (419) | .10 (419) | .10 (419) | .10 (419) | .104 (435) | ||||||
| Pattern or Die Shrinkage: in/in | .006 | .006 | .006 | .006 | .007 | .006 | NA | .018 | .016 | .010 | .010 |
| Alloy | Zinc | Aluminum | Magnesium | Bronze / Brass | Iron | ||||||
| Zamak 2 | Zamak 3 | Zamak 5 | Zamak 7 | ZA 8 | 380 | AZ-91D | SAE 660 C93200 | SAE 40 C83600 | Class 30 Gray Cast Iron | 32510 Malleable Iron | |
| Aluminum (Al) | 3.5-4.3 | 3.5-4.3 | 3.5-4.3 | 3.5-4.3 | 8.0-8.8 | ||||||
| Magnesium (Mg) | .020-.050 | .020-.05 | .03-.08 | .005-.020 | 015-.030 | ||||||
| Copper (Cu) | 2.5-3.0 | .25 max8 | .75-1.25 | .25 max | .8-1.3 | ||||||
| Iron (Fe) - max | .10 | .10 |
.10 | .075 | .075 | ||||||
| Lead (Pb) - max | .005 | .005 | .005 | .003 | .006 | ||||||
| Cadmium (Cd) - max | .004 | .004 | .004 | .002 | .006 | ||||||
| Tin (Sn) - max | .003 | .003 | .003 | .001 | .003 | ||||||
| Ni (other)9 | - | - | - | .005-.020 | - | ||||||
| Zinc (Zn) | Balance | Balance | Balance | Balance | Balance | ||||||
1 3 hr at 610oF and furnace cool.
2 1/4" square specimen unnotched.
3 10mm square specimen unnotched.
4 Comprehensive strength.
5 Previous industry accepted standard.
6 Estimated values to be confirmed by research
7 Values for permanent mold condition which should be similar for other processes.
8 Per ASTM B86--88. *For the majority of commercial applications, a copper content in the range of 0.25 to
0.75% will not adversely affect the serviceability of die castings and should not serve as a basis for rejection.*
9 Zamak alloy ingot for die casting (with the exception of % Ni in No. 7) may contain Ni, Cr, Mn, Si, in amounts of up to 0.02, 0.02, 0.06 and 0.035% respectively.
ZA Ingot for foundry and pressure die casting may contain Ni, Cr, or Mn in amounts of up to 0.01% each or 0.03% total.
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Advantages of Zinc Die Castings ● Zinc Die Casting Applications ● Selecting the Proper Alloy
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Creco Cast specializes in small and miniature precision zinc die casting with multislide equipment.
5151 Greenwich Rd. Seville, OH 44273 Toll Free:(888).349.7596 Phone:(330).769.2096 Fax:(330).769.4660 Email: websales@crecocast.com