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Cast Iron Thread Strength
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English
Abstract
Experimental results, together with calculations and formulas for the ultimate strength of cast iron internal threads, are presented. The calculated thread strength based on the formulas and double shear tests of cast iron samples is compared with direct tension tests on steel bolts engaged to various depths in tapped cast iron specimens. The wide range of strength values in cast iron is recognized. A chart for the necessary length of engagement for various SAE grades of bolts with different strength levels of cast iron summarizes the overall results.
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Authors
Citation
Lawser, J., "Cast Iron Thread Strength," SAE Technical Paper 680129, 1968, https://doi.org/10.4271/680129.Also In
References
- Screw-Thread Standards for Federal Services Handbook H28 1957 Part I, U. S. Dept. of Commerce National Bureau of Standards
- Unified Screw Threads ASA B 1.1-1960 The American Standards Association The American Society of Mechanical Engineers
- Lipari, D. T. “Strength of Screws and Tapped Holes.” Machine Design Jan. 20 1966 167 170