Brinell Hardness of Hardening Steels in Treated Conditions

Steel designation		Hardness in treated condition
Matl. Designation	Material Number	Treated for Shearability	Soft-Annealed	Treated for Strength	Treated to Ferrite-Pearlite
Matl. Designation	Material Number	max. HB	max. HB	HB	HB
C10E	1.1121	–	131	–	–
C10R	1.1207	–	131	–	–
C15E	1.1141	–	143	–	–
C15R	1.114	–	143	–	–
17Cr3	1.7016	–	174	–	–
17CrS3	1.7014	–	174	–	–
28Cr4	1.703	255	217	166 … 217	156 … 207
28CrS4	1.7036	255	217	166 … 217	156 … 207
16MnCr5	1.7131	–	207	156 … 207	140 … 187
16MnCrS5	1.7139	–	207	156 … 207	140 … 187
20MnCr5	1.7147	255	217	170 … 217	152 … 201
20MnCrS5	1.7149	255	217	170 … 217	152 … 201
20MoCr4	1.7321	255	207	156 … 207	140 … 187
20MoCrS4	1.7323	255	207	156 … 207	140 … 187
20NiCrMo2-2	1.6523	–	212	152 … 201	145 … 192
20NiCrMoS2-2	1.6526	–	212	152 … 201	145 … 192
17CrNiMo6-4	1.6566	255	229	179 … 229	149 … 201
17CrNiMoS6-4	1.6569	255	229	179 … 229	149 … 201
20CrNiMoS6-4	1.6571	255	229	179 … 229	154 … 207