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Stainless Steel (C Scale)

Approximate Hardness Conversion No.’s for
Austenitic Stainless Steel Sheet

Rockwell Hardness Number C Scale, 150 Kgf (HRC)	Rockwell Hardness Number A Scale, 60 Kgf (HRA)	Rockwell Superficial Hardness No. 15N Scale, 15 Kgf (15N)	Rockwell Superficial Hardness No. 30N Scale, 30 Kgf (30N)	Rockwell Superficial Hardness No.45N Scale, 40 Kgf (45N)
48	74.4	84.1	66.2	52.1
47	73.9	73.6	65.3	50.9
46	73.4	83.1	64.5	49.8
45	72.9	82.6	63.6	48.7
44	72.4	82.1	62.7	47.5
43	71.9	81.6	61.8	46.4
42	71.4	81	61	45.2
41	70.9	80.5	61.1	44.1
40	70.4	80	59.2	43
39	69.9	79.5	58.4	41.8
38	69.3	79	57.5	40.7
37	68.8	78.5	56.6	39.6
36	68.3	78	55.7	38.4
35	67.8	77.5	54.9	37.3
34	67.3	77	54	36.1
33	66.8	76.5	53.1	35
32	66.3	75.9	52.3	33.9
31	65.8	75.4	51.4	32.7
30	65.3	74.9	50.5	31.6
29	64.8	74.4	49.6	30.4
28	64.3	73.9	48.8	29.3
27	63.8	73.4	47.9	28.2
26	63.3	72.9	47	27
25	62.8	72.4	46.2	25.9
24	62.3	71.9	45.3	24.8
23	61.8	71.3	44.4	23.6
22	61.3	70.8	43.5	22.5
21	60.8	70.3	42.7	21.3
20	60.3	69.8	41.8	20.2