What is Grey Iron

Gray iron is also called gray iron, grey cast iron, is a type of iron with a carbon content greater than 2% and a graphitic microstructure. It is named after the grey color and appearance caused by graphite fractures in the material. Gray iron is the most common cast iron material in the casting process. It is relatively inexpensive, durable, malleable.

Grey Cast Iron Grades

Different grey iron grades in different countries and standards. Most grades have the same requirements for mechanical properties, especially tensile strength. Such as in the United States, the classification for grey iron is usually set using the ASTM International standard A48. Chinese standard is GB/T 9439-1988. Here, we list the main grey cast iron grades in the world.

ISOISO 185100150200250300350
ChinaGB 9439HT100HT150HT200HT250HT300HT350
USAASTM A48NO.20
NO.25
NO.30NO.35NO.40
NO.45
NO.50NO.55
NO.60
Germany
Austria
DIN 1691GG10GG15GG20GG25GG30GG35GG40
EuropeanEN 1561EN-GJL-100EN-GJL-150EN-GJL-200EN-GJL-250EN-GJL-300EN-GJL-350 
JapanJIS G5501FC100FC150FC200FC250FC300FC350
ItalyUNI 5007G10G15G20G25G30G35
FranceNF A32-101FGL150FGL200FGL250FGL300FGL350FGL400
UKBS 1452100150200250300350
IndiaIS 210FG150FG200FG260FG300FG350FG400
SpainUNFFG15FG20FG25FG30FG35
BelgiumNBN 830-01FGG10FGG15FGG20FGG25FGG30FGG35FGG40
AustraliaAS 1830T150T220T260T300T350T400
SwedenSS 14 01O110O115O120O125O130O135O140
NorwayNS11 100SJG100SJG150SJG200SJG250SJG300SJG350
Min. Tensile Strength (Mpa)100150200250300350
Grey Iron Grades

Gray Cast Iron Composition

Application

Grey Iron Casting Manufacturer -JC Casting