Effect of surface condition on ultimate strength and plastic deformation capacity of pipe members for spheroidal graphite cast iron

Spheroidal graphite cast iron is not allowed to use the structural members in buildings, because its ductility is considered to be very low. On the other hand, this iron is often used to automobile parts. This study investigates the ductility of this iron, and clarifies the possibility to apply to the structural members in the structures. This paper clarified the tensile performance of the spheroidal graphite cast iron material and the performance of the tension and compression member with a casting surface. It is shown that spheroidal graphite cast iron pipe members under compression load have the brittle behavior after post local buckling.