NODULAR / DUCTILE IRONS

The Metallurgy of MEEHANITE Nodular Iron

This range of cast irons is known under a variety of names - Nodular, SG iron, Ductile or Spheroidal Graphite iron. These materials possess strength and ductile properties of a different type to flake or grey cast irons, whilst maintaining comparable machining characteristics.

While providing mechanical properties similar to cast steel or malleable iron, nodular iron presents few of the problems met with either (founding, high heat treatment and distortion, seize and section limitations etc).

As nodular iron can be poured at temperatures much lower than for cast steel, cast finish and dimensional accuracy are improved.

For more information on this subject why not email us and ask for a copy of the brochure:
"MEEHANITE Nodular Graphite Irons for General Engineering Applications"
 
   

Typical Mechanical and Physical Properties
(from separately cast test pieces of standard round 25mm diameter)

MEEHANITE
TYPE
Tensile Strength (min) N/mm² 0.2% Proof Stress (min) N/mm² Elongation % (min) Brinell Hardness HB30
SFF350

SFF400

SF400

SF420.12

SFP500

SPF600

SP700

SH800

SH1000
350

400

400

420

500

600

700

800

1000
220

250

250

260

320

380

440

500

600
24

20

17

12

8

4

3

2

1
110 - 150

120 - 160

140 - 190

150 - 200

170 - 220

200 - 250

230 - 280

250 - 320

280 - 550


Technical Data on Property Values v. Section

MEEHANITE
TYPE
GUIDANCE VALUES IN RELATION TO WALL SECTION
Wall Section mm

from/to
Anticipated minimum values in the casting
Tensile Strength N/mm² 0.2% Proof Stress N/mm² Elongation %
SFF350





SFF400





SF400





SFP500





SPF600





SP700
up to 50
50 / 80
80 / 120
120 / 200


up to 50
50 / 80
80 / 120
120 / 200


up to 50
50 / 80
80 / 120
120 / 200


up to 50
50 / 80
80 / 120
120 / 200


up to 50
50 / 80
80 / 120
120 / 200


up to 50
50 / 80
80 / 120
120 / 200
350
340
330
320


400
380
370
360


400
380
370
360


500
450
440
430


600
520
470
450


700
600
570
520
220
210
200
190


250
240
230
220


250
240
230
230


320
300
290
280


380
340
320
320


400
380
370
360
22
19
16
12


20
17
14
10


17
15
12
8


8
7
6
5


3
2
1
1


2
1
1
1





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