Hardness Conversion Table
Rockwell Special hardness
Vickers Hardness
Brinel Hardness
Shore Hardness
Tensile Strength
HrC150KG
HrA60KG
HrD100KG
HrB100KG
15-N15KG
30-N30KG
45-N45KG
Hv50KG
HB3000KG
HS
KG/㎟
68.0
85.6
76.9
93.2
84.4
75.4
940.0
-
97.0
67.5
85.3
76.5
93.0
84.0
74.3
920.0
96.0
67.0
85.0
76.1
92.9
83.6
74.2
900.0
95.0
66.4
84.7
75.7
92.7
83.1
73.6
880.0
65.3
75.3
92.5
82.7
73.1
860.0
92.0
65.0
84.1
74.8
92.3
82.2
72.2
840.0
91.0
64.7
83.8
92.1
81.7
71.8
820.0
90.0
64.0
83.4
73.8
91.8
81.1
71.0
800.0
88.0
63.3
83.0
73.3
91.5
80.4
70.2
780.0
87.0
62.5
82.6
72.6
91.2
79.7
69.4
760.0
86.0
61.8
72.1
79.1
68.6
740.0
61.0
81.8
71.5
90.7
78.4
67.7
720.0
60.1
81.3
70.8
90.3
77.6
66.7
700.0
81.0
59.7
70.5
90.1
77.2
66.2
690.0
80.8
70.1
89.8
76.8
65.7
680.0
80.0
232.0
58.8
80.6
69.8
89.7
76.4
670.0
228.0
58.3
80.3
89.5
75.9
660.0
70.0
224.0
57.8
69.0
89.2
75.5
64.1
650.0
221.0
57.3
79.8
68.7
89.0
75.1
63.5
640.0
77.0
217.0
56.8
79.5
68.3
88.8
74.6
63.0
630.0
214.0
56.3
79.2
67.9
88.5
62.4
620.0
75.0
210.0
55.7
78.9
88.2
61.7
610.0
207.0
55.2
78.6
73.2
61.2
600.0
74.0
203.0
54.7
87.8
72.7
60.5
590.0
200.0
54.1
78.0
87.5
59.9
580.0
72.0
196.0
53.6
77.8
65.8
87.2
71.7
59.3
570.0
193.0
53.0
77.4
65.4
86.9
71.2
58.6
560.0
189.0
52.3
64.8
86.6
550.0
505.0
186.0
51.7
76.7
64.4
86.3
57.0
540.0
496.0
183.0
51.1
63.9
69.5
56.2
530.0
488.0
179.0
50.5
85.7
55.6
520.0
480.0
176.0
49.8
62.9
85.4
510.0
473.0
173.0
49.1
62.2
53.9
500.0
465.0
66.0
169.0
48.4
74.9
61.6
67.1
53.1
490.0
456.0
165.0
47.7
74.5
61.3
84.3
52.2
448.0
162.0
46.9
74.1
60.7
83.9
51.3
470.0
441.0
158.0
46.1
64.9
50.4
460.0
433.0
62.0
155.0
45.3
59.4
83.2
64.3
49.4
450.0
425.0
151.0
44.5
72.8
82.8
440.0
415.0
59.0
148.0
43.6
72.3
58.2
82.3
62.7
47.4
430.0
405.0
144.0
42.7
57.5
61.9
46.4
420.0
397.0
141.0
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