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	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

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

Mechanical properties of ferrite nodular cast iron at a low temperature

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

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