HRC=6.96+0.089HB (323<HB<501)

　　HRC=8.32+0.0834HV (329<HV<517)

　　HRC=-3.74+0.81HS (41<HS<68)

　　HB=15.28+0.938HV (329<HV<517)

　　HB=-120.22+9.1HS (41<HS<68)