1.1 This standard covers the deviations for untoleranced dimensions of malleable iron castings. Three classes of deviations are dealt with as given below:
Class 1 Deviations for malleable iron castings involving improved moulding processes for precision work.
Class 2 Deviations for malleable iron castings involving machine moulding process.
Class 3 Deviations for malleable iron castings involving hand moulding process.
IS 8349-1977 history
1977IS 8349-1977 Untolerance dimensional deviations of malleable iron castings