c60/F级
80-90
100D
Mn49Si19/ Mn55Si14 / Mn55Si17 A / Mn55Si17 B
150D
270D/150D100D/65D
FeSi45#
Ba: 8~12/Ca: 28~32 P≤0.04、S≤0.02
75A/75B72A/72B