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JIS G5502 1995 Standard for Ductile Iron

This is a Japanese industrial standard specifies the physical properties of spheroidal graphite iron castings, which are also called as ductile iron. The latest version is JIS G5502 2001. However, the main content was not changed.

This standard is similar with the other standards for nodular iron such as ASTM A536 in USA, GB T1348 in China, KS D4302 in Korea, DIN 1693 in Germany and ISO 1083. The following is the main content of JIS G5502-1995 standard for your reference.

Grade of ductile cast iron and mechanical properties and structure of cast integral test bar

Grade
Grade of old type
Tensile strength
σb≥/Mpa
Yield strength
σ0.2≥/Mpa
Elongation
δ≥(%)
Hardness
HBS
Main microstructure
FCD350-22
_
350
220
22
≤150
ferrite
FCD350-22L
_
350
220
22
≤150
ferrite
FCD400-18
FCD40
400
250
18
 
ferrite
FCD400-18L
 
400
250
18
 
ferrite
FCD400-15
FCD40
400
250
15
 
ferrite
FCD450-10
FCD45
450
280
10
 
ferrite
FCD500-7
FCD50
500
320
7
 
ferrite +perlite
FCD600-3
FCD60
600
370
3
 
perlite+ferrite
FCD700-2
FCD70
700
420
2
 
perlite
FCD800-2
FCD80
800
480
2
 
Perlite or tempered structure

 
Impact property of specimen with V gap made from cast integral test bar of ductile cast iron 

Grade
AKV at room temperature
AKV at low temperature
Test temperature
/℃
Average value
≥/J
Individual value
≥/J
Test temperature
/℃
Average value
≥/J
Individual value
≥/J
FCD350-22
23±5
17
14
 
-
-
FCD350-22L
 
-
-
-40±2
12
9
FCD400-18
23±5
14
11
 
 
 
FCD400-18L
 
 
 
-20±2
12
9

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
FCD400-18A
>30~60
>60~200
390
370
250
250
15
12
120~180
ferrite
FCD400-18AL
>30~60
>60~200
390
370
250
240
15
12
120~180
ferrite
FCD400-15A
>30~60
>60~200
390
370
250
240
15
12
120~180
ferrite
FCD500-7A
>30~60
>60~200
450
420
300
290
7
5
130~230
ferrite +perlite
FCD600-3A
>30~60
>60~200
600
550
360
340
2
1
160~270
perlite+ferrite

Impact property of specimen with V gap made from attached test block of ductile cast iron 

Grade
Thickness
/mm
AKV at room temperature
AKV at low temperature
Test
temperature
/℃
Average value
≥/J
Individual value
≥/J
Test
temperature
/℃
Average value
≥/J
Individual value
≥/J
FCD400-18A
>30~60
>60~200
23±5
23±5
14
12
11
9
-
-
-
-
-
-
FCD400-18AL
>30~60
>60~200
-
-
-
-
-
-
-20±2
-20±2
12
10
9
7

Chemical analysis of ductile cast iron  (mass fraction)(%)

Grade
C
Si
Mn
P
S
Mg
FCD350-22
FCD350-22L
≤2.5
≤2.7
≤0.4
0.08
0.02
0.09
FCD400-18
FCD400-18L
≤2.5
≤2.7
≤0.4
0.08
0.02
0.09
FCD400-18A
FCD400-18AL
≤2.5
≤2.7
≤0.4
0.08
0.02
0.09
FCD400-15
FCD400-15A
≤2.5
-
-
-
0.02
0.09
FCD450-10
≤2.5
-
-
-
0.02
0.09
FCD500-7
FCD500-7A
≤2.5
-
-
-
0.02
0.09
FCD600-3
FCD600-3A
≤2.5
-
-
-
0.02
0.09
FCD700-2
FCD800-2
≤2.5
-
-
-
0.02
0.09


Grade and mechanical properties of isothermal quenching nodular cast iron 
Grade
Grade with the old type
Tensile strength
σb≥/Mpa
Yield strength
σ0.2≥/Mpa
Elongation
δ≥(%)
Hardness
HBS
FCAD900-4
-
900
600
10
-
FCAD900-8
FCAD900A
900
600
8
-
FCAD1000-5
FCAD1000A
1000
700
5
-
FCAD1200-2
FCAD1200A
1200
900
2
≥341
FCAD1400-1
-
1400
1100
1
≥401

Mechanical properties of ferrite nodular cast iron at a low temperature

Grade
Tensile strength
σb≥/Mpa
Yield strength
σ0.2≥/Mpa
Elongation  δ
AKV at low temperature
Average value
(%)
Individual value
(%)
Test
temperature
/℃
Average value
/ J
Individual value
/ J
ferrite magnesium iron
≥300
≥200
≥12
≥8
-40
≥6
≥4
 
The chemical analysis of isothermal quenching nodular cast iron and ferrite nodular cast iron used at low temperature
Grade
 C
Si
Mn
P
S
Ni
Cu
Mg
Others
isothermal quenching magnesium iron
FCAD900-4
3.2~3.8
2.2~3.0
≤0.7
0.05
0.05
≤3.0
≤1.5
≤0.06
Cr≤0.07;Mo≤0.5;Ti≤0.04
FCAD900-8
3.2~3.8
2.0~3.0
≤0.7
0.05
0.05
≤3.0
≤1.5
≤0.06
Cr≤0.07;Mo≤0.5;Ti≤0.04
FCAD1000-5
3.2~3.8
2.0~3.0
≤0.7
0.05
0.05
≤3.0
≤1.5
≤0.06
Cr≤0.07;Mo≤0.5;Ti≤0.04
FCAD1200-2
3.2~3.8
2.0~3.0
≤0.7
0.05
0.05
≤3.0
≤1.5
≤0.06
Cr≤0.07;Mo≤0.5;Ti≤0.04
FCAD1400-1
3.2~3.8
2.0~3.0
≤0.7
0.05
0.05
≤3.0
≤1.5
≤0.06
Cr≤0.07;Mo≤0.5;Ti≤0.04
ferrite magnesium iron
≥3.0
≤2.5
≤0.4
0.05
0.02
-
-
-
-

Application and Hardness of isothermal quenching nodular cast iron and ferrite nodular cast iron used at low temperature

Grade
Hardness of attached test block
HBS
Application
FCAD900-4
FCAD900-8
277~252
248~352
high toughness castings
FCAD1000-5
280~388
high toughness castings
FCAD1200-2
FCAD1400-1
241~415
401~460
high hardness castings
ferrite magnesium iron
-
Thick section castings used at low temperature

 

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