Material-group  Materials Accuracy grade D alloys based on iron, nickel, cobalt and copper D1 to D3 A alloys based on aluminium and magnesium A1 to A3 T alloys based on titanium T1 to T3 MATERIAL GROUP D – LINEAR DIMENSIONAL CASTING TOLERANCES (IN MM) Nominal Size D1 tolerance D2 tolerance D3 tolerance up to 6 … Continue reading Investment Casting Tolerances VDG P690