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Hardness: 40-50hrc density: 7.4g/cm3 Cast steel grit: g10 g12 g14 g16 g18 g25 g40 g54 g80 Hardness: gp 46-50hrc gl 56-60hrc gh 63-66hrc Density: 7.6g/cm3 Chemical compositions C 0.7-1.20% mn 0.60-1.20% si 0.4 -1.2 % s
