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

1ChinaHT350HT300HT250HT200HT150HT100
2JapanFC350FC300FC250FC200FC150FC100
3USANO.60NO.50NO.45NO.35NO.30NO.20
4Russia(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
5GermanyGG40GG35GG30GG25GG20GG15
6ItalyG35G30G25G20G15G10
7FranceFGL400FGL350FGL300FGL250FGL200FGL150
8England350300250200150100
9PolandZ140Z135Z130Z125Z120Z115
10IndiaFG400FG350FG300FG260FG200FG150
11RomaniaFC400FC350FC300FC250FC200FC150
12SpainFG35FG30FG25FG20FG15
13BelgiumFGG40FGG35FGG30FGG25FGG20FGG15FGG10
14AustraliaT400T350T300T260T220T150
15SwedenO140O135O130O125O120O115O110
16HungaryOV40OV35OV30OV25OV20OV15
17BulgariaVch35Vch30Vch25Vch20Vch15
18ISO350300250200150100
19COPANTFG400FG350FG300FG250FG200FG150FG100
20China TaiwanFC300FC250FC200FC150FC100
21HollandGG35GG30GG25GG20GG15
22LuxembourgFGG40FGG35FGG30FGG25FGG20FGG15
23AustriaGG35GG30GG25GG20GG15

 

Table 2. Ductile Cast Iron Grades

NO.Country

Ductile Cast Iron Grades

1ChinaQT400-18QT450-10QT500-7QT600-3QT700-2QT800-2QT900-2
2JapanFCD400FCD450FCD500FCD600FCD700FCD800
3USA60-40-1865-45-1270-50-0580-60-03100-70-03120-90-02
4Russia(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
5GermanyGGG40GGG45GGG50GGG60GGG70GGG80
6ItalyGS370-17GS400-12GS500-7GS600-2GS700-2GSS800-2
7FranceFGS370-17FGS400-12FGS500-7FGS600-2FGS700-2FGS800-2
8England400/17420/12500/7600/7700/2800/2900/2
9PolandZS3817ZS4012ZS4505
ZS5002
ZS6002ZS7002ZS8002ZS9002
10IndiaSG370/17SG400/12SG500/7SG600/3SG700/2SG800/2
11RomaniaFGN70-3
12SpainFGE38-17FGE42-12FGE50-7FGE60-2FGE70-2FGE80-2
13BelgiumFNG38-17FNG42-12FNG50-7FNG60-2FNG70-2FNG80-2
14Australia300-17400-12500-7600-3700-2800-2
15Sweden0717-020727-020732-030737-010864-03
16HungaryGǒV38GǒV40GǒV50GǒV60GǒV70
17Bulgaria380-17400-12450-5
500-2
600-2700-2800-2900-2
18ISO400-18450-10500-7600-3700-2800-2900-2
19COPANTFMNP45007FMNP55005FMNP65003FMNP70002
20China TaiwanGRP400GRP500GRP600GRP700GRP800
21HollandGN38GN42GN50GN60GN70
22LuxembourgFNG38-17FNG42-12FNG50-7FNG60-2FNG70-2FNG80-2
23AustriaSG38SG42SG50SG60SG70