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Hardness Conversion Table for Steel and Cast Steel

Conversion on hardness values resulting from the various methods of testing should be avoided whenever possible because it always involves errors. specifications should therefore give hardness values of such testing procedures which are actually used in testing. However, in some instances a conversion is necessary. The following compilation is taken from the "Werkstoffhandbuch

For stahl und Eisen" (Handbook for steel and iron) third edition, and is reproduced by permission of "Verlag Stahleisen m.b.H", Dusseldorf, Germany.

The hardness values which are not within the range of application are given in parentheses

Mean Values Mean Values

HV	HB	HRc.	HRc 62.5	HRb	Shore	Ultimate Tensile strength kg/mm2 Ós:ÓB .100= >80	65-80	<65	HV	HB	HRc	HRc 62.5	HRb	Shore	Ultimate Tensile strength kg/mm Ós:ÓB .100= >80 / 65-80/ <65
60				(2.6)					440	423	44.4	72.3		60.7
65				(13.1)					445	426	44.8	72.5		61.2
70				(22.0)					450	430	45.1	72.6		61.8
75				(29.7)					455	434	45.5	72.8		62.3

80				36.4					460		45.8	73.0		62.8
85				42.3					465		46.2	73.2		63.4
90				47.5					470		46.5	73.4		63.9
95				52.1					475		46.9	73.6		64.4

100				56.3	12.7		34.6	36.1	480		47.2	73.7		64.9
105				60.0	13.4		36.2	37.8	485		47.5	73.9		65.4
110				63.4	14.2		37.9	39.5	490		47.9	74.1		65.9
115				66.5	15.0		39.4	41.3	495		48.2	74.3		66.4

120				69.5	15.8		41.0	43.0	500		48.5	74.4		66.9
125				71.9	16.7		42.6	44.7	510		49.1	74.7		67.8
130				74.3	17.5		44.3	46.5	520		49.7	75.1		68.8
135				76.5	18.3		46.1	48.3	530		50.3	75.4		69.7

140				78.5	19.1		47.9	50.0	540		50.9	75.7		70.6
145				80.4	19.9		49.5	51.6	550		51.4	76.0		71.5
150		(1.6)		82.2	20.7	49.2	51.0	53.7	560		51.9	76.2		72.4
155		(3.2)		83.8	21.5	51.0	52.9	55.4	570		52.5	76.5		73.3

160		(4.8)		85.4	22.3	52.7	54.8	57.0	580		53.0	76.8		74.1
165		(6.3)		86.8	23.1	54.1	56.4	58.9	590		53.5	77.1		75.0
170		(7.7)		88.2	23.9	55.7	58.0	60.7	600		54.0	77.3		75.8
175		(9.0)		89.5	24.7	57.4	59.7	62.5	610		54.5	77.6		76.6

180		(10.3)		90.7	25.5	59.0	61.6	64.3	620		55.0	77.9		77.4
185		(11.5)		91.8	26.3	60.7	63.4	66.1	630		55.4	78.1		78.2
190		(12.7)		92.9	27.1	62.5	65.0	67.9	640		55.9	78.3		78.9
195		(13.9)		93.9	27.9	64.0	66.9	69.5	650		56.3	78.6		79.7

200		(15.0)		94.9	28.7	65.8	68.6	71.5	660		56.8	78.8		80.4
205		(16.1)		95.8	29.5	67.5	70.5	73.3	670		57.2	79.0		81.1
210		(17.1)		96.6	30.2	69.0	72.0	75.1	680		57.6	79.2		81.8
215		(18.1)		97.5	31.0	71.0	74.0	77.0	690		58.0	79.4		82.5

220		(19.0)		98.3	31.8	72.7	75.9	78.9	700		58.4	79.6		83.2
225		20.0		99.0	32.5	74.5	77.5	80.7	710		58.8	79.9		83.9
230		20.9		99.7	33.3	76.1	79.4	82.6	720		59.2	80.1		84.6
235		21.7		(100.4)	34.1	78.0	81.3	84.2	730		59.6	80.3		85.2

240		22.6		(101.1)	34.8	79.8	83.0	86.3	740		60.0	80.5		85.8
245		23.4		(101.7)	35.6	81.5	84.8	88.5	750		60.3	80.7		86.5
250		24.2		(102.3)	36.3	83.0	86.7	90.0	760		60.7	80.9		87.1
255		25.0		(102.9)	37.0	84.9	88.5		770		61.0	81.0		87.7

260		25.8		(103.5)	37.8	86.8	90.2		780		61.4	81.2		88.3
265		26.5		(104.0)	38.5	88.5	92.0		790		61.8	81.4		88.9
270		27.2		(104.5)	39.2	90.2	93.9		800		62.1	81.6		89.5
275		27.9		(105.0)	40.0	92.1	95.6		810		62.4	81.8		90.1

280		28.6		(105.5)	40.7	93.9	97.6		820		62.7	81.9		90.6
285		29.3		(105.9)	41.4	95.7	99.5		830		63.1	82.1		91.1
290		29.9		(106.4)	42.1	98.5	101.3		840		63.4	82.3		91.7
295		30.6		(106.8)	42.8	99.3	103.0		850		63.7	82.4		92.2

300		31.2	65.3	(107.2)	43.5	101.0	104.9		860		64.0	82.6		92.7
305		31.8	65.6	(107.6)	44.2	103.0	106.7		870		64.3	82.8		93.2
310		32.4	65.9	(108.0)	44.8	104.8	108.6		880		64.6	82.9		93.7
315		33.0	66.2	(108.4)	45.5	106.5	110.5		890		64.9	83.1		94.2

320		33.5	66.5	(108.7)	46.2	108.2	112.6		900		65.2	83.2		94.7
325		34.1	66.8	(109.1)	46.9	110.1	114.5		910		65.4	83.4		95.2
330		34.7	67.1	(109.4)	47.5	112.0	116.4		920		65.7	83.5		95.7
335		35.2	67.4	(109.8)	48.2	114.0	118.5		930		66.0	83.7		96.2

340		35.7	67.7	(110.1)	48.8	115.9	120.4		940		66.3	83.8		96.6
345		36.2	67.9	(110.4)	49.5	117.7			950		66.5	83.9		97.1
350		36.7	68.2	(110.7)	50.1	119.7			960		66.8	84.1		97.5
355		37.2	68.5	(111.0)	50.7	121.5			970		(67.1)	84.2		98.0

360	359	37.7	68.7	(111.3)	51.4	123.3			980		(67.3)	84.4		98.4
365	364	38.2	69.0	(111.5)	52.0	125.3			990		(67.6)	84.5		98.8
370	368	38.6	69.2	(111.8)	52.6	127.0			1000		(67.8)			99.2
375	372	39.1	69.5	(112.1)	53.2	128.9			1010		(68.1)			99.5

380	376	39.5	69.7		53.8	130.9			1020		(68.3)
385	380	40.0	69.9		54.4	132.7			1030		(68.5)
390	385	40.4	70.2		55.0	134.6			1040		(68.8)
395	388	40.8	70.4		55.6	136.5			1050		(69.0)

400	392	41.3	70.6		56.2	138.4			1060		(69.2)
405	396	41.7	70.8		56.8	140.4			1070		(69.5)
410	400	42.1	71.0		57.4	142.3			1080		(69.7)
415	404	42.5	71.3		57.9	144.2			1090		(69.9)

420	408	42.9	71.5		58.5	146.1			1100		(70.1)
425	412	43.3	71.7		59.1	148.0
430	415	43.7	71.9		59.6	150.0
435	419	44.1	72.1		60.2


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