Ductile Iron


2Dura-Bar ductile iron is a cost-saving alternative to low-medium carbon steels and has similar strengths with excellent free machining properties. The nodular graphite provides the same free machining benefits as lead, without creating the machining and waste disposal problems. 65-45-12, 80-55-06, 100-70-03 and 60-40-18 will conform to ASTM A536, with the primary difference being the high nodule count and fine grain size inherent to the Dura-Bar continuous casting process. SSDI is similar to ISO 1083/JS/500-10. The different grades are produced by controlling the matrix structure around the graphite nodules.

IronStock GradesNon-Stock Grades
DuctileSSDI, 65-45-12, 80-55-06
65-45-12X, 80-55-06X
60-40-18, 100-70-03

Ductile Iron Grade Comparison

GradeTensile Strength (psi)Yield Strength (psi)ElongationFatigue Strength (psi)Extended Size Range
65-45-12 >65,00045,0001240,000 
65-45-12X >65,00045,0001240,000Yes
SSDI >75,00055,0001540,000 
80-55-06 >80,00055,000640,000 
80-55-06X >80,00055,000640,000Yes
100-70-03 >100,00070,000340,000 
60-40-18 >60,00040,00018n/a 

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