An Engineering Comparison of Die Cast Zinc and Injection Molded Polymers 710199
An engineering evaluation conducted by the International Lead Zinc Research Organization, Inc. (ILZRO) has produced data which verify that die cast zinc is stronger, stiffer, and more thermally resistant than five major engineering thermoplastics-polycarbonate, polyacetal, nylon, ABS (acrylonitrile-butadiene-styrene), and polypropylene-under identical test procedures. However, since zinc is five to eight times more dense than the polymers tested (and most other unfilled polymers), the plastics industry often stresses the high strength-to-weight ratios and low cost per cubic inch of plastics as more than offsetting advantages. The question facing the design engineer, therefore, is: which material is the best choice for the particular application; that is, which will provide the required strength and stiffness at lowest cost? On the basis of the comparative tests performed in this research effort, the SAE 903 zinc die casting alloy is demonstrably the superior material on a cost-performance basis.
Citation: Lazar, L. and Herrschaft, D., "An Engineering Comparison of Die Cast Zinc and Injection Molded Polymers," SAE Technical Paper 710199, 1971, https://doi.org/10.4271/710199. Download Citation
Author(s):
L. S. Lazar, D. C. Herrschaft
Affiliated:
United States Testing Co., International Lead Zinc Research Organization, Inc.
Pages: 12
Event:
1971 Automotive Engineering Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1971 Transactions-V80-A
Related Topics:
Casting
Casting alloys
Plastics
Test procedures
Polymers
Research and development
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