HRC vs HB Hardness: Differences and Conversion

What is Hardness ?

Hardness is a performance index used to measure the resistance of materials to indentation or deformation caused by hard objects.

There are several methods for hardness testing, each with its own principles and meaning behind the measured hardness values.

The most commonly used method is the static load indentation hardness test, which includes Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC), Vickers hardness (HV) and Shore hardness (HA, HD) for rubber and plastics.

These values ​​indicate the material's ability to resist indentation from hard objects.

On the other hand, rebound hardness testing includes popular methods such as Leeb hardness (HL) and Shore hardness (HS), which measure the elastic deformation work of metals.

Therefore, hardness is not simply a physical quantity, but a comprehensive performance index that reflects the elasticity, plasticity, strength and toughness of materials.

Steel hardness

The hardness of metals is indicated by the H code. Based on various hardness testing methods, the following classifications can be made:

● Conventional methods include Brinell (HB), Rockwell (HRC), Vickers (HV), and Leeb (HL) hardness tests. Among these, HB and HRC are most commonly used.

● HB has a wide range of applications, while HRC is suitable for materials with high surface hardness, such as those obtained through heat treatment.

The main difference between these two tests is the type of probe used in the hardness tester. The Brinell hardness tester employs a steel ball as a probe, while the Rockwell hardness tester uses a diamond probe.

● HV – suitable for microscopic analysis. Vickers hardness (HV) is measured by pressing a diamond square cone indenter with a top angle of 136° into the surface of the material with a load of less than 120kg. The Vickers hardness value (HV) is obtained by dividing the surface area of ​​the material's indentation pit by the load value.

● HL portable hardness tester is convenient for measurements. It works by bouncing after the impact ball head hits the hard surface. Hardness is calculated using the ratio of the rebound velocity to the impact velocity of the punch at 1 mm from the sample surface and the formula: Leeb Hardness HL = 1000 × VB (rebound velocity) / VA (impact velocity).

● The most commonly used portable Leeb hardness tester can be converted to Brinell (HB), Rockwell (HRC), Vickers (HV) and Shore (HS) hardness after measuring with Leeb (HL). Alternatively, you can directly measure the hardness value using Brinell (HB), Rockwell (HRC), Vickers (HV), Leeb (HL) and Shore (HS) using the Leeb principle.

The TH series Leeb hardness tester produced by Time Company has this function, which is a useful complement to the traditional desktop hardness machine! (For details, click Leeb Hardness Tester TH140/TH160/HLN-11A/HS141 Portable Series).

1. HB – Brinell Hardness:

Brinell hardness (HB) is typically used for soft materials such as non-ferrous metals, steel before heat treatment or after annealing.

On the other hand, Rockwell hardness (HRC) is generally used for materials with greater hardness, such as those that have undergone heat treatment.

To measure Brinell hardness, a hardened steel ball or carbide ball of a specific diameter is pressed into the surface of the material being tested under a specified test load, held for a set time, and then discharged to measure the diameter. surface indentation. being tested.

The Brinell hardness value is calculated by dividing the load by the spherical surface area of ​​the indentation.

Typically, a hardened steel ball with a diameter of 10 mm is pressed onto the surface of the material with a load of 3000 kg for a certain period. After unloading, the relationship between the load and the indentation area produces the Brinell hardness value (HB), measured in kilograms of force per square millimeter (kgf/mm2 or N/mm2).

2. HR Rockwell hardness

Rockwell hardness (HR) is a method for determining the hardness index of a material based on the depth of plastic deformation of the indentation. Hardness is measured in units of 0.002 mm.

When the Brinell hardness test cannot be used, such as when the material's HB value is greater than 450 or the sample size is too small, the Rockwell hardness test is used.

This test involves pressing a diamond cone with a top angle of 120° or a steel ball with a diameter of 1.59 mm or 3.18 mm onto the surface of the tested material under a specific load. The hardness of the material is then calculated from the depth of the indentation.

There are three different scales for Rockwell hardness measurements based on the hardness of the test material:

HRA: It is a measure of hardness determined using a conical diamond indenter and applying a load of 60kg. This scale is used for materials that have extremely high hardness, such as carbide.

HRB: It is a measure of hardness determined using a hardened steel ball with a diameter of 1.59mm and applying a load of 100kg. This scale is used for low hardness materials, such as annealed steel, cast iron, etc.

HRC: It is a measure of hardness determined using a conical diamond press and applying a load of 150kg. This scale is used for materials that have high hardness, such as tempered steel, etc.

Furthermore:

(1) HRC stands for Rockwell hardness scale C.

(2) HRC and HB are widely used in production.

(3) The HRC application range is HRC 20 to 67, which is equivalent to HB225 to 650. If the hardness exceeds this range, the Rockwell hardness scale A (HRA) must be used. If the hardness is less than this range, the B Rockwell Hardness Scale (HRB) should be used. The upper limit of Brinell hardness (HB650) cannot be exceeded.

(4) The C scale indenter of the Rockwell hardness tester is a diamond cone with a top angle of 120 degrees. The test load is a specific value, with a Chinese standard of 150 kg of force.

The Brinell hardness tester uses a hardened steel ball (HBS) or a hard metal ball (HBW) as an indenter, and the test load varies with the diameter of the ball, ranging from 3,000 to 31.25 kgf.

(5) The indentation of Rockwell hardness is very small and the measured value is localized, so it is necessary to measure the average value at several points. It is suitable for finished products and thin films and is classified as non-destructive testing.

The indentation of Brinell hardness is large and the measured value is accurate. It is not suitable for finished products and thin films and is generally not considered non-destructive testing.

(6) The Rockwell hardness value is a dimensionless number and has no unit. Therefore, it is incorrect to refer to Rockwell hardness in terms of degrees. The Brinell hardness value has units and has an approximate relationship with tensile strength.

(7) Rockwell hardness can be displayed directly on the dial or digitally. It is easy to operate, fast and intuitive, making it suitable for mass production. Brinell hardness requires a microscope to measure the diameter of the indentation and then check the table or perform calculations, which can be complicated.

(8) Under certain conditions, HB and HRC can be checked and exchanged. The mental calculation formula is approximately 1HRC ≈ 1/10HB.

Following are several common comparison tables:

1. National standard hardness conversion table HLD/HRC/HRB/HV/HB/HSD

2. According to the German standard DIN50150, the following is the comparison table between the tensile strength of steels in the common range and Vickers hardness, Brinell hardness and Rockwell hardness:

Tensile strength RmN/mm 2	High voltage	HB	CDH
250	80	76.0	–
270	85	80.7	–
285	90	85.2	–
305	95	90.2	–
320	100	95.0	–
335	105	99.8	–
350	110	105	–
370	115	109	–
380	120	114	–
400	125	119	–
415	130	124	–
430	135	128	–
450	140	133	–
465	145	138	–
480	150	143	–
490	155	147	–
510	160	152	–
530	165	156	–
545	170	162	–
560	175	166	–
575	180	171	–
595	185	176	–
610	190	181	–
625	195	185	–
640	200	190	–
660	205	195	–
675	210	199	–
690	215	204	–
705	220	209	–
720	225	214	–
740	230	219	–
755	235	223	–
770	240	228	20.3
785	245	233	21.3
800	250	238	22.2
820	255	242	23.1
835	260	247	24.0
850	265	252	24.8
865	270	257	25.6
880	275	261	26.4
900	280	266	27.1
915	285	271	27.8
930	290	276	28.5
950	295	280	29.2
965	300	285	29.8
995	310	295	31.0
1030	320	304	32.2
1060	330	314	33.3
1095	340	323	34.4
1125	350	333	35.5
1115	360	342	36.6
1190	370	352	37.7
1220	380	361	38.8
1255	390	371	39.8
1290	400	380	40.8
1320	410	390	41.8
1350	420	399	42.7
1385	430	409	43.6
1420	440	418	44.5
1455	450	428	45.3
1485	460	437	46.1
1520	470	447	46.9
1555	480	(456)	47.7
1595	490	(466)	48.4
1630	500	(475)	49.1
1665	510	(485)	49.8
1700	520	(494)	50.5
1740	530	(504)	51.1
1775	540	(513)	51.7
1810	550	(523)	52.3
1845	560	(532)	53.0
1880	570	(542)	53.6
1920	580	(551)	54.1
1955	590	(561)	54.7
1995	600	(570)	55.2
2030	610	(580)	55.7
2070	620	(589)	56.3
2105	630	(599)	56.8
2145	640	(608)	57.3
2180	650	(618)	57.8
	660		58.3
	670		58.8
	680		59.2
	690		59.7
	700		60.1
	720		61.0
	740		61.8
	760		62.5
	780		63.3
	800		64.0
	820		64.7
	840		65.3
	860		65.9
	880		66.4
	900		67.0
	920		67.5
	940		68.0

Approximate relationship table of various hardness

HBA	HB	High voltage	HWB	CDH
GYZJ 934-1	10mm 500kg	5kg		B	AND	F	H
35		21					32
36		22					35
37		23					37
38		24					40
39		25					42
40	25	26					45
41	25	27					47
42	26	28					49
43	27	29					51
44	27	30					54
45	28	30					56
46	29	31					58
47	30	32			23		60
48	30	33	0.7		26		62
49	31	34	1.3		28		64
50	32	35	1.9		31		66
51	33	36	2.5		34		68
52	34	38	3.1		36		70
53	35	39	3.6		39	30	72
54	37	40	4.2		41	34	73
55	38	41	4.7		44	37	75
56	39	43	5.3		46	40	77
57	40	44	5.8		48	43	78
58	42	45	6.3		50	46	80
59	43	47	6.8		53	48	82
60	45	49	7.3		55	51	83
61	46	50	7.8		57	54	85
62	48	52	8.3		59	56	86
63	50	54	8.8		61	59	88
64	51	56	9.2		63	61	89
65	53	58	9.7		65	63	90
66	55	60	10.1		67	66	92
67	57	62	10.6		69	68	93
68	60	65	11		71	70	94
69	62	67	11.4		73	72	95
70	64	70	11.8	17	75	74	97
71	67	72	12.2	23	76	75	98
72	69	75	12.6	28	78	77	99
73	72	78	12.9	33	80	79	100
74	75	81	13.3	38	81	80	101
75	78	85	13.7	42	83	82	102
76	80	88	14	47	84	83	103
77	84	92	14.3	51	86	85	104
78	87	95	14.7	55	87	86	105
79	90	99	15	59	89	88	106
80	94	103	15.3	63	90	89	106
81	97	108	15.6	66	91	90	107
82	101	112	15.9	70	92	91	108
83	105	117	16.2	73	94	92	109
84	109	121	16.4	76	95	93	109
85	113	126	16.7	79	96	94	110
86	117	131	16.9	81	97	95	111
87	121	137	17.2	84	98	96	111
88	126	142	17.4	86	99	97	112
89	130		17.6	88	100	98	112
90	135		17.8	90	101	98	113
91	140		18		102	99	114
92	145		18.2		103	100
93			18.4		103	100
94			18.6		104	101
95			18.7		105	102
96			18.9		106	102
97			19		106	103
98			19.2		107
98			19.3		107
100			19.4		108

Note: Table 3 source: Baber Colman

Approximate conversion value of the Brinell hardness of steel

Brinell hardness (HB) 10mm 3,000kgf		Vickers hardness (HV)	Rockwell hardness				Shore Hardness (HS)	Tensile strength (approx.) MPa
Standard ball	Tungsten Carbide Ball		To load 60kgf (HRA)	To load 100kgf (HRB)	To load 100kgf (CHR)	To load 150kgf (DHR)
–	–	940	85.6	–	68	76.9	97	–
–	–	920	85.3	–	67.5	76.5	96	–
–	–	900	85	–	67	76.1	95	–
–	-767	880	84.7	–	66.4	75.7	93	–
–	-757	860	84.4	–	65.9	75.3	92	–
–	-745	840	84.1	–	65.3	74.8	91	–
–	-733	820	83.8	–	64.7	74.3	90	–
–	-722	800	83.4	–	64	73.8	88	–
–	-712	–	–	–	–	–	–	–
–	-710	780	83	–	63.3	73.3	87	–
–	-698	760	82.6	–	62.5	72.6	86	–
–	-684	740	82.2	–	61.8	72.1	–	–
–	-682	737	82.2	–	61.7	72	84	–
–	-670	720	81.8	–	61	71.5	83	–
–	-656	700	81.3	–	60.1	70.8	–	–
–	-653	697	81.2	–	60	70.7	81	–
–	-647	690	81.1	–	59.7	70.5	–	–
–	-638	680	80.8	–	59.2	70.1	80	–
–	630	670	80.6	–	58.8	69.8	–	–
–	627	667	80.5	–	58.7	69.7	79	–
–	–	677	80.7	–	59.1	70	–	–
–	601	640	79.8	–	57.3	68.7	77	–
–	–	640	79.8	–	57.3	68.7	–	–
–	578	615	79.1	–	56	67.7	75	–
–	–	607	78.8	–	55.6	67.4	–	–
–	555	591	78.4	–	54.7	66.7	73	2055
–	–	579	78	–	54	66.1	–	2015
–	534	569	77.8	–	53.5	65.8	71	1985
–	–	533	77.1	–	52.5	65	–	1915
–	514	547	76.9	–	52.1	64.7	70	1890
-495	–	539	76.7	–	51.6	64.3	–	1855
–	–	530	76.4	–	51.1	63.9	–	1825
–	495	528	76.3	–	51	63.8	68	1820
-477	–	516	75.9	–	50.3	63.2	–	1780
–	–	508	75.6	–	49.6	62.7	–	1740
–	477	508	75.6	–	49.6	62.7	66	1740
-461	–	495	75.1	–	48.8	61.9	–	1680
–	–	491	74.9	–	48.5	61.7	–	1670
–	461	491	74.9	–	48.5	61.7	65	1670
444	–	474	74.3	–	47.2	61	–	1595
–	–	472	74.2	–	47.1	60.8	–	1585
–	444	472	74.2	–	47.1	60.8	63	1585
429	429	455	73.4	–	45.7	59.7	61	1510
415	415	440	72.8	–	44.5	58.8	59	1460
401	401	425	72	–	43.1	57.8	58	1390
388	388	410	71.4	–	41.8	56.8	56	1330
375	375	396	70.6	–	40.4	55.7	54	1270
363	363	383	70	–	39.1	54.6	52	1220
352	352	372	69.3	-110	37.9	53.8	51	1180
341	341	360	68.7	-109	36.6	52.8	50	1130
331	331	350	68.1	-108.5	35.5	51.9	48	1095
321	321	339	67.5	-108	34.3	51	47	1060
311	311	328	66.9	-107.5	33.1	50	46	1025
302	302	319	66.3	-107	32.1	49.3	45	1005
293	293	309	65.7	-106	30.9	48.3	43	970
285	285	301	65.3	-105.5	29.9	47.6	–	950
277	277	292	64.6	-104.5	28.8	46.7	41	925
269	269	284	64.1	-104	27.6	45.9	40	895
262	262	276	63.6	-103	26.6	45	39	875
255	255	269	63	-102	25.4	44.2	38	850
248	248	261	62.5	-101	24.2	43.2	37	825
241	241	253	61.8	100	22.8	42	36	800
235	235	247	61.4	99	21.7	41.4	35	785
229	229	241	60.8	98.2	20.5	40.5	34	765
223	223	234	–	97.3	-18.8	–	–
217	217	228	–	96.4	-17.5	–	33	725
212	212	222	–	95.5	-16	–	–	705
207	207	218	–	94.6	-15.2	–	32	690
201	201	212	–	93.8	-13.8	–	31	675
197	197	207	–	92.8	-12.7	–	30	655
192	192	202	–	91.9	-11.5	–	29	640
187	187	196	–	90.7	-10	–	–	620
183	183	192	–	90	-9	–	28	615
179	179	188	–	89	-8	–	27	600
174	174	182	–	87.8	-6.4	–	–	585
170	170	178	–	86.8	-5.4	–	26	570
167	167	175	–	86	-4.4	–	–	560
163	163	171	–	85	-3.3	–	25	545
156	156	163	–	82.9	-0.9	–	–	525
149	149	156	–	80.8	–	–	23	505
143	143	150	–	78.7	–	–	22	490
137	137	143	–	76.4	–	–	21	460
131	131	137	–	74	–	–	–	450
126	126	132	–	72	–	–	20	435
121	121	127	–	69.8	–	–	19	415
116	116	122	–	67.6	–	–	18	400
111	111	117	–	65.7	–	–	15	385

Hardness testing is a simple and easy method of testing mechanical properties.

To replace some mechanical property tests with hardness tests, a more accurate conversion relationship between hardness and strength is required in production.

Empirical evidence has shown that there is an approximate correlation between the various hardness values ​​of metallic materials, as well as between hardness and strength values.

As the hardness value is determined by the resistance to initial and continuous plastic deformation, a material with greater strength will present greater resistance to plastic deformation and, therefore, higher hardness values.

National Standard Hardness Conversion Table HLD/HRC/HRB/HV/HB/HSD

DAN	CDH	HRB	High voltage	HB(1)	HB(2)	HD	DAN	CDH	HRB	High voltage	HB(1)	HB(2)	HD
300			83				596	33.9		322	314	315	46.3
302			84				598	34.2		325	316	318	46.6
304			85				600	34.5		328	319	320	46.9
306			85				602	34.8		330	322	323	47.2
308			86				604	35.1		333	324	325	47.5
310			87				606	35.4		336	327	328	47.8
312			87				608	35.7		338	330	331	48.2
314			88				610	35.9		341	332	333	48.5
316			89				612	36.2		344	335	336	48.8
318			90				614	36.5		346	338	339	49.1
320			90				616	36.8		349	340	341	49.4
322			91				618	37.1		352	343	344	49.7
324			92				620	37.4		355	346	346	50.1
326			93				622	37.6		357	349	349	50.4
328			94				624	37.9		360	351	352	50.7
330			94				626	38.2		363	354	355	51
332			95				628	38.5		366	357	357	51.3
334			96				630	38.7		369	360	360	51.7
336			97				632	39		372	363	363	52
338			98				634	39.3		375	366	366	52.3
340			99				636	39.6		377	369	369	52.6
342			100				638	39.8		380	371	371	52.9
344			101				640	40.1		383	374	374	53.3
346			101				642	40.4		386	377	377	53.6
348			102				644	40.7		389	380	380	53.9
350		59.6	103				646	40.9		392	383	383	54.2
352		60.3	104				648	41.2		395	386	386	54.6
354		61	105				650	41.5		398	389	389	54.9
356		61.7	106				652	41.7		401	392	392	55.2
358		62.4	107				654	42		404	395	395	55.6
360		63.1	108				656	42.3		407	398	398	55.8
362		63.8	109				658	42.6		411	401	401	56.2
364		64.5	110				660	42.8		414	404	404	56.5
366		65.1	111				662	43.1		417	407	407	56.9
368		65.8	112				664	43.4		420	410	410	57.2
370		66.4	114				666	43.6		423	413	413	57.5
372		67	115				668	43.9		426	417	417	57.9
374		67.7	116				670	44.1		429	420	420	58.2
376		68.3	117				672	44.4		433	423	423	58.5
378		68.9	118				674	44.7		436	426	426	58.9
380		69.5	119				676	44.9		439	429	429	59.2
382		70.1	120				678	45.2		442	432	432	59.5
384		70.6	121				680	45.5		446	435	435	59.9
386		71.2	123				682	45.7		449	439	439	60.2
388		71.8	124				684	46		452	442	442	60.5
390		72.3	125				686	46.2		456	445	445	60.9
392		72.9	126				688	46.5		459	448	448	61.2
394		73.4	127				690	46.8		463	451	451	61.6
396		74	129				692	47		466	455	455	61.9
398		74.5	130				694	47.3		469	458	458	62.2
400		75	131		142		696	47.5		473	461	461	62.6
402		75.5	133		144		698	47.8		476	465	465	62.9
404		76	134		145		700	48		480	468	468	63.3
406		76.5	135		147		702	48.3		483	471	471	63.6
408		77	136		149		704	48.6		487	474	474	64
410		77.5	138		150		706	48.8		491	478	478	64.3
412		78	139		152		708	49.1		494	481	481	64.6
414		78.4	141		153		710	49.3		498	485	485	65
416		78.9	142		155		712	49.6		501	488	488	65.3
418		79.3	143		156		714	49.8		505	491	491	65.7
420		79.8	145	140	157		716	50.1		509	495	495	66
422		80.2	146	141	159		718	50.3		513	498	498	66.4
424		80.7	148	143	160		720	50.6		516	502	502	66.7
426		81.1	149	144	162		722	50.8		520	505	505	67.1
428		81.5	151	145	163		724	51.1		524	508	508	67.4
430		81.9	152	147	165		726	51.3		528	512	512	67.8
432		82.4	154	148	166		728	51.6		532	515	515	68.2
434		82.8	155	150	168		730	51.8		535	519	519	68.5
436		83.2	157	151	169		732	52.1		539	522	522	68.9
438		83.6	158	153	171		734	52.3		543	526	526	69.2
440		84	160	154	172		736	52.6		547	529	529	69.6
442		84.4	161	156	174		738	52.8		551	533	533	69.9
444		84.8	163	157	175		740	53.1		555	536	536	70.3
446		85.1	164	159	176		742	53.3		559	540	540	70.7
448		85.5	166	160	178		744	53.6		563	543	543	71
450		85.9	168	162	179		746	53.8		568	547	547	71.4
452		86.3	169	164	181		748	54.1		572	551	551	71.8
454		86.6	171	165	182		750	54.3		576	554	554	72.1
456		87	173	167	184		752	54.5		580	558	558	72.5
458		87.4	174	168	185		754	54.8		584	561	561	72.9
460		87.7	176	170	187	26.4	756	55		589	565	565	73.2
462		88.1	178	172	188	26.7	758	55.3		593	569	569	73.6
464		88.5	179	173	190	27	760	55.5		597	572	572	74
466		88.8	181	175	191	27.3	762	55.7		602	576	576	74.3
468		89.2	183	177	193	27.6	764	56		606	580	580	74.7
470		89.5	185	178	194	27.9	766	56.2		610	583	583	75.1
472		89.9	186	180	196	28.2	768	56.5		615	587	587	75.5
474		90.3	188	182	197	28.5	770	56.7		619	591	591	75.8
476		90.6	190	184	198	28.8	772	56.9		624	594	594	76.2
478		91	192	185	200	29.1	774	57.2		628	598	598	76.6
480		91.3	194	187	202	29.4	776	57.4		633	602	602	77
482		91.7	195	189	203	29.7	778	57.6		638	605	605	77.4
484		92.1	197	191	205	30	780	57.9		642	609	609	77.7
486		92.4	199	192	206	30.3	782	58.1		647	613	613	78.1
488		92.8	201	194	208	30.6	784	58.3		652	617	617	78.5
490		93.1	203	196	209	30.9	786	58.6		657	620	620	78.9
492		93.5	205	198	211	31.2	788	58.8		662	624	624	79.3
494		93.9	207	200	212	31.5	790	59		666	628	628	79.7
496		94.3	209	202	214	31.7	792	59.2		671	632	632	80.1
498		94.6	211	204	215	32	794	59.5		676	635	635	80.5
500		95	213	205	217	32.2	796	59.7		681	639	639	80.9
502		95.4	215	207	219	32.5	798	59.9		686	643	643	81.2
504		95.8	217	209	220	32.8	800	60.1		691	647	647	81.6
506		96.2	219	211	222	33.1	802	60.4		697	651	651	82
508		96.6	221	213	224	33.3	804	60.6		702			82.4
510	19.8	97	223	215	225	33.6	806	60.8		707			82.8
512	20.2	97.4	225	217	227	33.9	808	61		712			83.2
514	20.6	97.9	227	219	229	34.2	810	61.2		718			83.7
516	21	98.3	229	221	230	34.4	812	61.4		723			84.1
518	21.3	98.7	231	223	232	34.7	814	61.7		728			84.5
520	21.7	99.2	233	225	234	35	816	61.9		734			84.9
522	22	99.6	235	227	235	35.3	818	62.1		739			85.3
524	22.4		237	229	237	35.6	820	62.3		745			85.7
526	22.8		239	231	239	35.8	822	62.5		750			86.1
528	23.1		241	234	241	36.1	824	62.7		756			86.5
530	23.5		244	236	242	36.4	826	62.9		762			87
532	23.8		246	238	244	36.7	828	63.1		768			87.4
534	24.1		248	240	246	37	830	63.3		773			87.8
536	24.5		250	242	248	37.3	832	63.5		779			88.2
538	24.8		252	244	250	37.6	834	63.7		785			88.6
540	25.2		255	246	252	37.9	836	63.9		791			89.1
542	25.5		257	249	254	38.1	838	64.1		797			89.5
544	25.8		259	251	256	38.4	840	64.3		803			89.9
546	26.2		261	253	258	38.7	842	64.5		809			90.4
548	26.5		264	255	259	39	844	64.7		816			90.8
550	26.8		266	258	261	39.3	846	64.9		822			91.2
552	27.1		268	262	263	39.6	848	65.1		828			91.7
554	27.5		270	262	265	39.9	850	65.3		835			92.1
556	27.8		273	265	268	40.2	852	65.4		841			92.6
558	28.1		275	267	270	40.5	854	65.6		848			93
560	28.4		278	269	272	40.8	856	65.8		854			93.5
562	28.8		280	272	274	41.1	858	66		861			93.9
564	29.1		282	274	276	41.4	860	66.2		867			94.4
566	29.4		285	276	278	41.7	862	66.3		874			94.8
568	29.7		287	279	280	42	864	66.5		881			95.3
570	30		290	281	282	42.3	866	66.7		888			95.7
572	30.3		292	283	285	42.6	868	66.8		895			96.2
574	30.6		294	286	287	42.9	870	67		902			96.7
576	30.9		297	288	289	43.2	872	67.2		909			97.1
578	31.2		299	291	292	43.5	874	67.3		916			97.6
580	31.5		302	293	294	43.8	876	67.5		923			98.1
582	31.8		304	296	296	44.1	878	67.6		931			98.6
584	32.1		307	298	299	44.4	880	67.8		938			99
586	32.4		309	301	301	44.7	882	68		946			99.5
588	32.7		312	303	304	45	884	68.1		953
590	33		315	306	308	45.4	886	68.2		961
592	33.3		317	308	310	45.7	888	68.4		968
594	33.6		320	311	313	46	890	68.5		976