Grey Iron Castings (IS : 210-1970)
 
Code for Designation Grades Tensile strength Min. kgf/mm2 Transverse Test Typical Applications
Breaking load Min,kgf Corresponding transverse rupture stress kgf/mm2 Deflection Min,mm
FG 15 15 15 800 34.0 4.0 General structural purposes.
FG 20 20 20 900 38.2 4.5
FG 25 25 25 1000 42.4 5.0 Severe strains e.g. cylinder parts.
FG 30 30 30 1100 46.7 5.5
FG 35 35 35 1350 57.3 5.5 Extra ordinary use.
FG 40 40 40 1500 63.7 5.5