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EXPERIMENTAL DESIGN AND PR0CEDURE
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0.25 percent sulphur 0.30 percent lead 0.35 percent phosphorus 0.l0 percent 5.0 inch diameter ASTM type austenite base iron carbide cast iron Castings Poured charge materials chilling propensity clear chill width CM CM cooling rate Effect of Lead eutectic cells eutectic solidification ferrosilicon formation graphite flakes graphite forms graphite morphology gray iron castings green sand molds hardness values hydrogen hydrogen content inch diameter castings intercellular l.5 inch lead addition level level of lead liquid iron manganese matrix structure mechanical properties Mesh Graphite Microstructural Characteristics Note that heat nucleation pearlitic percent ferrite percent lead addition Poured in Green poured in wet quasi-Widmanstaetten graphite series of heats showed silicon solidification process Strength and Hardness sulphur level Summary of Microstructural superheating Table-l2 tensile strength type of graphite undercooled graphite undercooled types wedge wet sand molds Widmanstaetten graphite Widmanstaetten type