DUCTILE IRON DATA

FOR DESIGN ENGINEERS

INTRODUCTION

Figure 2.8  Microstructures and tensile strengths for various types of Ductile Iron.

Matrix
Ferritic
Grade 5		 Ferritic-
pearlitic
Grade 3		 Pearlitic
Grade 1		 Martensitic
(With
retained
austenite)		 Tempered
Martensitic		 ADI
Grade 150		 ADI
Grade 230		 Austenitic
60,000 p.s.i.
(414 mPa)		 80,000 p.s.i.
(552 mPa)		 100,000 p.s.i.
(690 mPa)		 N.A.* 115,000 p.s.i.
(793 mPa)		 150,000 p.s.i.
(1050 mPa)		 230,000 p.s.i.
(1600 mPa)		 45,000 p.s.i.
(310 mPa)

fig2_8.GIF (59981 bytes)
*Approximate ultimate tensile strength 87,000 p.s.i. (600 mPa) Hard, Brittle.  (Note that the magnifications are different.)