The 1020, 1045, 4140 and 4340 steels can be satisfactorily
boronized in a mixture of borax and SiC at 1273 K. The resulting
boride layer is a Fe2B single phase one. In the boride layer, the
maximum microhardness value for all steels was greater than
2000 HV0.1. Among all steels, the boronized 1020 showed the
best abrasive wear resistance.