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.)