ASTM A-518
Corrosion resistant gray iron. High in silicon.
GR1
GR2
GR3
ASTM A-874
Ductile iron for low temperatures.
gr 60-4018
gr 65-45-15
ASTM A-319
High temperature gray iron without pressure.
Gr 60 – 30
Gr 65 – 35
Gr 70 – 36
ASTM A-571
Ductile iron for low temperatures.
gr 60-40-18
gr 65-45-15