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SUMMARY The wear characteristics of four different matrices of an S.G.* cast iron have been investigated under dry sliding conditions at a constant speed of 200 cm/sec over a load range of 0.35-27 kg. The as-cast pearlitic structure had a hardness of 210 HV 30,and the isothermally "transformed pearlite, bainite and tempered martensite were all approximately 310 HV 30.
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