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ISO 1083 1987 Standard for Ductile Iron

ISO 1083 1987 defines the grades and the corresponding requirements for spheroidal graphite cast iron, which is also called as ductile iron or nodular iron. The latest version of this standard is ISO 1083 - 2004, however, the main content was not changed since version 1987. This standard was issued by ISO for stipulating the physical properties of ductile iron.

This standard is similar with the other standards for nodular iron such as ASTM A536 in USA, GB T1348 in China and KS D4302 in Korea. The following is the main content of ISO 1083-1997 standard for your reference.

Grade of ductile cast iron and mechanical properties and structure of cast integral test bar
Grade
Tensile strength
σb≥/Mpa
Yield strength
σ0.2≥/Mpa
Elongation
δ≥(%)
Hardness
HBS
 
Main microstructure
900-2
900
600
2
280~360
bainite or tempered martensite
800-2
800
480
2
245-335
perlite or tempered structure
700-2
700
420
2
225~305
perlite
600-3
600
370
3
190~270
perlite+ferrite
500-7
500
320
7
170~230
ferrite +perlite
450-10
450
320
10
160~210
ferrite +perlite
400-15
400
250
15
130~180
ferrite
400-18
400
250
18
130~180
ferrite
350-22
350
220
22
≤150
ferrite
 
Impact value of specimen with V gap of Attached test block of ductile cast iron
Grade
 
Thickness
    / mm
        Impact toughness at room temperature        
aK[(23±5)℃]≥/(J/cm2
  Impact toughness at low temperature aK≥/(J/cm2
Average value
Individual value
Test temperature
Average value
Individual value
400-18A
>30~60
>60~200
14
12
11
9
 
400-18AL
>30~60
>60~200
—20±2℃
—20±2℃
12
10
9
7
350-22A
>30~60
>60~200
17
15
14
12
 
350-22AL
>30~60
>60~200
—40±2℃
—40±2℃
12
10
9
7
 

Mechanical properties and structure of attached test block of ductile cast iron

 
Grade
Thickness
/mm
Tensile strength
σb≥/Mpa
Yield strength
σ0.2≥/Mpa
Elongation
δ≥(%)
Hardness
HBS
Main microstructure
700-2A
>30~60
>60~200
700
650
400
380
2
1
200~320
perlite
600-3A
>30~60
>60~200
600
550
360
340
2
1
180~270
perlite+ferrite
500-7A
>30~60
>60~200
450
420
300
290
7
5
170~240
ferrite +perlite
400-15A
>30~60
>60~200
390
370
250
240
15
12
130~180
ferrite
400-18A
>30~60
>60~200
390
370
250
240
15
12
130~180
ferrite
350-22A
>30~60
>60~200
330
320
220
210
18
15
≤150
ferrite
 
Hardness Grade Hardness and structure of ductile cast iron castings
Hardness Grade
Hardness
HBS
Main structure analysis
Mechanical properties (parameter)
Tensile strength
σb≥/Mpa
Yield strength
σ0.2≥/Mpa
Elongation
δ≥(%)
H330
280~360
bainite or tempered martensite
900
600
2
H300
245~335
perlite or tempered martensite
800
480
2
H265
225~305
perlite
700
420
2
H230
190~270
perlite—ferrite
600
370
3
H200
170~230
ferrite —perlite
500
320
7
H185
160~210
ferrite
450
310
10
H155
130~180
ferrite
400
250
15
H150
130~180
ferrite
400
250
18
H130
≤150
ferrite
350
220
22

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