Ductile Iron
ASTM A536-84
Grade Minimum Tensile Strength, PSI Minimum Yield Strength, PSI Minimum
Elongation %
Typical BHN Range
60-40-18 60,000 40,000 18 143-187
65-45-12 65,000 45,000 12 156-207
80-55-06 80,000 55,000 6 179-255
100-70-03 100,000 70,000 3 217-269
Gray Iron
ASTM A 48-83
Class Minimum Tensile Strength, PSI Typical BHN Range
CL30 30,000 170-228
CL35 35,000 187-241
CL40 40,000 207-255
CL45 45,000 217-269
Hydratec® Minimum Tensile
 Strength, PSI
Elongation% Typical BHN Range
90,000 1-2 228-285
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