标准硬度块
硬度值范围 零件代号
80~88HRA #1110
85~100HRB #1121
60~80HRB #1122
20~50HRB #1123
60~70HRC #1131
35~55HRC #1132
20~30HRC #1133
80~90HRF #1160
70~90HR15N #1211
42~80HR30N #1212
20~70HR45N #1213
73~93HR15T #1221
43~82HR30T #1222
12~72HR45T #1223