There are many different cast iron grades in different countries/regions. Usually, we can know the tensile strength and elongation of different grades of cast iron from the grades chart. Here, we have listed all common grades of gray cast iron and ductile iron for your reference.

Please check the following gray cast iron and ductile iron grades in all countries/regions.

Please note that these levels in the same row can be substituted for each other. However, there are still some subtle differences between them. For example, for ductile cast iron in American grades, the minimum elongation of 70-50-05 is 5%. But according to China’s equivalent grade, QT500-7 requires a minimum elongation rate of 7%. Moreover, if there are some special letters on the grade, such as “L”, it usually means that the material needs to be used at low temperatures. Therefore, you must pay more attention to the impact requirements of the material at low temperatures. Compared with products of the same grade without “L”, their impact resistance requires higher standards.

 

Table 1. Grey Cast Iron Grades

NO. Country

Grey Cast Iron Grades

1 China HT350 HT300 HT250 HT200 HT150 HT100
2 Japan FC350 FC300 FC250 FC200 FC150 FC100
3 USA NO.60 NO.50 NO.45 NO.35 NO.30 NO.20
4 Russia (40) C Ч 40 (35) C Ч 35 (30) C Ч 30 (25) C Ч 25 (20) C Ч 20 (15) C Ч 15 (10) C Ч 10
5 Germany GG40 GG35 GG30 GG25 GG20 GG15
6 Italy G35 G30 G25 G20 G15 G10
7 France FGL400 FGL350 FGL300 FGL250 FGL200 FGL150
8 England 350 300 250 200 150 100
9 Poland Z140 Z135 Z130 Z125 Z120 Z115
10 India FG400 FG350 FG300 FG260 FG200 FG150
11 Romania FC400 FC350 FC300 FC250 FC200 FC150
12 Spain FG35 FG30 FG25 FG20 FG15
13 Belgium FGG40 FGG35 FGG30 FGG25 FGG20 FGG15 FGG10
14 Australia T400 T350 T300 T260 T220 T150
15 Sweden O140 O135 O130 O125 O120 O115 O110
16 Hungary OV40 OV35 OV30 OV25 OV20 OV15
17 Bulgaria Vch35 Vch30 Vch25 Vch20 Vch15
18 ISO 350 300 250 200 150 100
19 COPANT FG400 FG350 FG300 FG250 FG200 FG150 FG100
20 China Taiwan FC300 FC250 FC200 FC150 FC100
21 Holland GG35 GG30 GG25 GG20 GG15
22 Luxembourg FGG40 FGG35 FGG30 FGG25 FGG20 FGG15
23 Austria GG35 GG30 GG25 GG20 GG15

 

Table 2. Ductile Cast Iron Grades

NO. Country

Ductile Cast Iron Grades

1 China QT400-18 QT450-10 QT500-7 QT600-3 QT700-2 QT800-2 QT900-2
2 Japan FCD400 FCD450 FCD500 FCD600 FCD700 FCD800
3 USA 60-40-18 65-45-12 70-50-05 80-60-03 100-70-03 120-90-02
4 Russia (40 )B Ч 40 (45) B Ч 45 (50) B Ч 50 (60) B Ч 60 (70) B Ч 70 (80) B Ч 80 (100) B Ч 100
5 Germany GGG40 GGG45 GGG50 GGG60 GGG70 GGG80
6 Italy GS370-17 GS400-12 GS500-7 GS600-2 GS700-2 GSS800-2
7 France FGS370-17 FGS400-12 FGS500-7 FGS600-2 FGS700-2 FGS800-2
8 England 400/17 420/12 500/7 600/7 700/2 800/2 900/2
9 Poland ZS3817 ZS4012 ZS4505
ZS5002
ZS6002 ZS7002 ZS8002 ZS9002
10 India SG370/17 SG400/12 SG500/7 SG600/3 SG700/2 SG800/2
11 Romania FGN70-3
12 Spain FGE38-17 FGE42-12 FGE50-7 FGE60-2 FGE70-2 FGE80-2
13 Belgium FNG38-17 FNG42-12 FNG50-7 FNG60-2 FNG70-2 FNG80-2
14 Australia 300-17 400-12 500-7 600-3 700-2 800-2
15 Sweden 0717-02 0727-02 0732-03 0737-01 0864-03
16 Hungary GǒV38 GǒV40 GǒV50 GǒV60 GǒV70
17 Bulgaria 380-17 400-12 450-5
500-2
600-2 700-2 800-2 900-2
18 ISO 400-18 450-10 500-7 600-3 700-2 800-2 900-2
19 COPANT FMNP45007 FMNP55005 FMNP65003 FMNP70002
20 China Taiwan GRP400 GRP500 GRP600 GRP700 GRP800
21 Holland GN38 GN42 GN50 GN60 GN70
22 Luxembourg FNG38-17 FNG42-12 FNG50-7 FNG60-2 FNG70-2 FNG80-2
23 Austria SG38 SG42 SG50 SG60 SG70