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Cast Iron Grades

There are many different cast iron grades in many countries. From these grades, normally, we can see the tensile strength and elongation. Herein, we listed all common grades for grey cast iron and ductile cast iron for your reference.

Please see the following grey cast iron and ductile cast iron grades for each standards in all countries.

Please notice, in theory, these grades in the same row can replace each other. However, there are still some small differences with them. Such as, for ductile iron, as grades in USA, the 70-50-05 should have elongation min. 5%, but according to the equable grades in China, the QT500-7 requires the min. elongation as 7%. Moreover, if the grades have the some special letter such as "L", it usually means the material needed to be used in the Low temperature. So, you must pay more attention to the impact requirements in the low temperature. Their impact resistance will need higher standard than the equal grades without "L".

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 C Ч 40 C Ч 35 C Ч 30 C Ч 25 C Ч 20 C Ч 15 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 B Ч 40 B Ч 45 B Ч 50 B Ч 60 B Ч 70 B Ч 80 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 - -

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