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ISO 1083 - 2004 standard for Ductile Iron Material
Grades and Properties
ISO 1083 -2004 is the latest standard for
ductile iron material grades, mechanical and chemical properties. As
for the previous version, please refer to
ISO 1083 - 1987.
The current ISO
standard for ductile iron, ISO 1083, specifies grades either by
tensile strength, proof stress and elongation or Brinell hardness.
Tensile strength is by far the more common specification. The
following table shows the range of grades available within the
current ISO standard, by tensile strength.
|
Material
Designation |
Tensile Strength
N/mm² |
Proof Stress
N/mm2 |
Elongation
% |
|
ISO 1083/JS/350-22/S |
350 |
220 |
22 |
|
ISO 1083/JS/400-18/S |
400 |
250 |
18 |
|
ISO 1083/JS/400-15/S |
400 |
250 |
15 |
|
ISO 1083/JS/450-10/S |
450 |
310 |
10 |
|
ISO 1083/JS/500-7/S |
500 |
320 |
7 |
|
ISO 1083/JS/550-5/S |
550 |
350 |
5 |
|
ISO 1083/JS/600-3/S |
600 |
370 |
3 |
|
ISO 1083/JS/700-2/S |
700 |
420 |
2 |
|
ISO 1083/JS/800-2/S |
800 |
480 |
2 |
|
ISO 1083/JS/900-2/S |
900 |
600 |
2 |
Table A.1 Classification as a
function of hardness
|
Material designation |
Brinell hardness range
HBW |
Other properties a,b |
|
Rm
N/mm |
Rp0,2
N/mm |
|
ISO 1083 /JS/ HBW 130 |
Less than 160 |
350 |
220 |
|
ISO 1083 /JS/ HBW 150 |
130 to 175 |
400 |
250 |
|
ISO 1083 /JS/ HBW 155 |
135 to 180 |
400 |
250 |
|
ISO 1083 /JS/ HBW 185 |
160 to 210 |
450 |
310 |
|
ISO 1083 /JS/ HBW 200 |
170 to 230 |
500 |
320 |
|
ISO 1083 /JS/ HBW 215 |
180 to 250 |
550 |
350 |
|
ISO 1083 /JS/ HBW 230 |
190 to 270 |
600 |
370 |
|
ISO 1083 /JS/ HBW 265 |
225 to 305 |
700 |
420 |
|
ISO 1083 /JS/ HBW 300 |
245 to 335 |
800 |
480 |
|
ISO 1083 /JS/ HBW 330 |
270 to 360 |
900 |
600 |
|
NOTE 1 N/mm=1
MPa |
Chemical composition
The chemical
composition of spherical graphite cast irons is not specified by
this International standard. Chemical composition will vary
depending on the method of manufacturing (charge materials, casting
dimension, etc.). Table A.2 shows one example of the chemical
composition of ISO 1083/JS/500-10 in order to fulfill the
requirements for tensile strength, elongation and harness.
Table A.2-Example of chemical
composition
|
C %
approx |
Si %
approx |
Mn %
max |
P %
max |
S %
max |
Mg %
approx |
Cu %
max |
|
3.3 |
3.7 |
0.3 |
0.05 |
0.02 |
0.04 |
0.1 |
Table A.3-Minimum impact
resistance values measured on V-notched test pieces machined from
separately cast samples.
|
Material
designation |
Minimum impact resistance values |
|
room temperature
(23 ±
5)℃ |
low temperature
(-20 ±
2)℃ |
low temperature
(-40 ±
2)℃ |
|
Mean value from 3 tests |
Individual value |
Mean value from 3 tests |
Individual value |
Mean value from 3 tests |
Individual value |
|
ISO1083/JS/350-22-LT/Sa |
- |
- |
- |
- |
12 |
9 |
|
ISO1083/JS/350-22-RT/Sb |
17 |
14 |
- |
- |
- |
- |
|
ISO1083/JS/400-18-LT/Sa |
- |
- |
12 |
9 |
- |
- |
|
ISO1083/JS/400-18-RT/Sb |
14 |
11 |
- |
- |
- |
- |
|
NOTE 1 The impact
resistance values for these materials apply to castings cast
in sand moulds of comparable thermal behaviour. Subject to
amendments to be agreed upon in the order, they can apply to
castings obtained by alternative methods.
NOTE 2 Whatever the method
used for obtaining the castings, the grades are based on the
mechanical properties measured on test pieces machined form
samples separately cast in a sand mould or a mould of
comparable thermal behaviour.
NOTE 3 These material
grades may be suitable for some pressure vessel applications
(For fracture toughness, see Annex C.) |
|
a
LT for low temperature
b
RT for room temperature |
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