• The 60-40-18 ductile iron alloy has moderate strength (60 ksi ultimate and 40 ksi yield) that cannot meet the mechanical requirements of the coupler.The ductility of 18% is high.
  
• The fatigue limit of the 60-40-18 alloy is 30 ksi and does meet the performance requirements.
  
• The alloy has a nominal machining speed of 100 m/min with carbide tools which meets the machining requirement.
  
• The 60-40-18 ductile iron alloy does not meet all the performance requirements

Go back to the alloy page and select an alternate cast iron alloy.