Technical

Gray Iron Material Grades

The Following is the material grade comparison table for gray cast iron in all countries.

Country	Standard	Equivalent Grades of Grey Iron (Gray Cast Iron)
ISO	ISO 185	100	150	200	250	300	350	-
Chine	GB 9439	HT100	HT150	HT200	HT250	HT300	HT350	-
USA	ASTM A48	-	NO.20 NO.25	NO.30	NO.35	NO.40 NO.45	NO.50	NO.55 NO.60
Germany Austria	DIN 1691	GG10	GG15	GG20	GG25	GG30	GG35	GG40
European	EN 1561	EN-GJL-100	EN-GJL-150	EN-GJL-200	EN-GJL-250	EN-GJL-300	EN-GJL-350	-
Japan	JIS G5501	FC100	FC150	FC200	FC250	FC300	FC350	-
Italy	UNI 5007	G10	G15	G20	G25	G30	G35	-
France	NF A32-101	-	FGL150	FGL200	FGL250	FGL300	FGL350	FGL400
UK	BS 1452	100	150	200	250	300	350	-
India	IS 210	-	FG150	FG200	FG250	FG300	FG350	FG400
Spain	UNF	-	FG15	FG20	FG25	FG30	FG35	-
Belgium	NBN 830-01	FGG10	FGG15	FGG20	FGG25	FGG30	FGG35	FGG40
Australia	AS 1830	-	T150	T220	T260	T300	T350	T400
Sweden	SS 14 01	0110	0115	0120	0125	0130	0135	0140
Norway	NS11 100	SJG100	SJG150	SJG200	SJG250	SJG300	SJG350	-
Min. Tensile Strength (Mpa)		100	150	200	250	300	350	-

SPECIFICATION FOR DUCTILE ( NODULAR /SPHEROIDAL IRON )
Country	Specification	Designation	Minimum Transile Strength/Elongation
INDIA		SG	800/2	700/2	600/3	500/7		420/12				400/18	350/22
UNITED KINGDOM	BS2789:1985		800/2	700/2	600/3	500/7		420/12				400/18	350/22
USA	ASIM A536- B4:1976		120-90-02	100-70-03	80-60-03	80-55-06		65-45-12				00-42-10	60-40-18
German	DIN 1693-1976	GGG	800/2	700/2	600/3	500/7		420/15				400/18	350/22
France	NF A 32-201-1976	FSG	800/2	700/2	600/3	500/7		420/12				370/17	--
Italy	UNI 4544:1979	GS	800/2	700/2	600/3	500/7		420/12				370/17	--
Japan	JI5 G5505:1982	FCD	(80)758/2	(70)686/2	(60)588/3	(50)490/7		(40)/392/12				(37)363/17	--
International	ISO 1083:1976		800/2	700/2	600/3	500/7		420/12				370/17	--
			(827/2)	(689/3)	(555/3)	(552/6)		(448/12)				(415/10)	(414/18)
Hardness BNS			248-352	229-302	192-269	170-241		201 max				179 max	160 max
Structure			P or T	P	P and F	F and P		F				F	F
Equivalence kot/mm2			81.6	71.45	61.2	51		42.8				40.8	35.7
			TC	Si	Min (Max)	Tc	Si	Min (Max)	Tc	Si	Min (Max)	Tc	Si	Min (Max)
			3.6-3.8	2.6-2.8	0.5	3.6-3.8	2.6-2.8	0.3	3.6-3.8	2.6-2.8	0.2	3.6-3.8	2.6-2.8	0.1
			3.5-3.6	2.2-2.5	0.6	3.5-3.6	2.2-2.5	0.36	3.5-3.6	2.2-2.5	0.25	3.5-3.6	2.2-2.5	0.15
			3.5-3.6	2.1-2.3	0.7	3.5-3.6	2.1-2.4	0.4	3.5-3.6	2.1-2.4	0.3	3.5-3.6	2.1-2.4
			3.4-3.5	1.9-2.1	0.8	3.4-3.5	2.0-2.2	0.5	3.4-3.5	2.0-2.2	0.35	3.4-3.5	2.0-2.2
			3.4-3.5	1.8-2.0	0.8	3.1-3.5	1.8-2.0	0.6	3.4-3.5	1.8-2.0		3.4-3.5	1.8-2.0	0.25

The following is the common application for each degree of grey cast iron for your refrence.

G100:

For samll loads, the friction and wear no special requirements for important casting, such as protective cover, cover, oil pan, hand wheels, frame, floor, hammer, small handle, etc.

G150:

Under moderate load of casting, such as the base, frame, box, knife, bed, bearing seat, tabl,e. wheels, cover, pump, value, pipe, flywheel, motor blocks and other.

G200 and G250:

Requirements withstand greater load and a certain degree of tightness or corrosion resistance of the more important castings such as cylinder, gear, base, flywheels, bed, cylinder block, cylinder liner, piston, gear box, brake wheel, coupling plate, medium pressure value, etc.

G300 and G350:

Under high load, wear and high air tightness important casting, such as heavy machine tools, shears, presses, automatic lathe bed, frame, high-pressure hydraulic parts, piston rings, force larger gear, cams, bushings, large engine crankshaft, cylinder block, cylinder liner, cylinder head, etc.