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A Design Study in Ductile Iron - Dotson Company Pivot Frame

Ductile Iron Grade Selection

The ductile iron casting specifications are given in ASTM A536. 
The alloy is available in five different grades.  The three grades of interest are shown below, along with the performance requirements.

ASTM A536 Grades 

Performance
Requirement

 Choose
A536 Grade 2
65-45-12		 Choose
A536 Grade 3
80-55-06 		Choose
A536 Grade 4
100-70-03
   Ultimate Tensile Strength  >80 ksi 65 ksi min 80 ksi min 100 ksi min
   Yield Strength  >55 ksi 45 ksi min 55 ksi min 70 ksi min
   % Elongation >6% 12% min 6% min 3% min
   Hardness  >195 BHN 156-217 BHN  187-255 BHN 241-302 BHN
Given the mechanical property requirements for the pivot plate, 
consider the nominal properties of  the three A536 grades in the table above.
Choose the grade that best meets the mechanical requirements. 


Back

Choose an alloy  grade above

10
 
Copyright 2005 by the American Foundry Society. All rights reserved.
Address Comments to: jss@afsinc.org. 
Last Modified:July, 2005 by STG

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 In cooperation with
 The Dotson Company.