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When quoting a
Brinell hardness number (BHN or more commonly HB), the conditions of the test used to obtain the number must be specified. The standard format for specifying tests can be seen in the example "HBW 10/3000". "HBW" means that a tungsten carbide (from the chemical symbol for tungsten or
394:
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from the
Spanish/Swedish/German name for tungsten, "Wolfram") ball indenter was used, as opposed to "HBS", which means a hardened steel ball. The "10" is the ball diameter in millimeters. The "3000" is the force in kilograms force.
435:. The XXX is the force to apply (in kgf) on a material of type YY (5 for aluminum alloys, 10 for copper alloys, 30 for steels). Thus a typical steel hardness could be written: 250 HB 30
114:. The large size of indentation and possible damage to test-piece limits its usefulness. However, it also had the useful feature that the hardness value divided by two gave the approximate
271:
Brinell hardness is sometimes quoted in megapascals; the
Brinell hardness number is multiplied by the acceleration due to gravity, 9.80665 m/s, to convert it to megapascals.
310:
159:
301:
from the material of the indenter, tungsten (wolfram) carbide). In former standards HB or HBS were used to refer to measurements made with steel indenters.
278:(UTS), although the relationship is dependent on the material, and therefore determined empirically. The relationship is based on Meyer's index (n) from
666:
84:
of materials through the scale of penetration of an indenter, loaded on a material test-piece. It is one of several definitions of hardness in
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282:. If Meyer's index is less than 2.2 then the ratio of UTS to BHN is 0.36. If Meyer's index is greater than 2.2, then the ratio increases.
670:
686:"EN ISO 6506-2:2017: Metallic materials – Brinell hardness test – Part 2: verification and calibration of testing machine"
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701:
693:
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The
Brinell hardness is designated by the most commonly used test standards (ASTM E10-14 and ISO 6506–1:2005) as
910:
694:"EN ISO 6506-3:2014: Metallic materials – Brinell hardness test – Part 3: calibration of reference blocks"
872:
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275:
115:
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702:"EN ISO 6506-4:2014: Metallic materials – Brinell hardness test – Part 4: Table of hardness values"
905:
389:{\displaystyle \operatorname {HBW} =0.102{\frac {2F}{\pi D\left(D-{\sqrt {D^{2}-d^{2}}}\right)}}}
17:
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5.0 HB (pure lead; alloyed lead typically can range from 5.0 HB to values in excess of 22.0 HB)
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ball is substituted for the steel ball. The indentation is measured and hardness calculated as:
759:
235:{\displaystyle \operatorname {BHN} ={\frac {2P}{\pi D\left(D-{\sqrt {D^{2}-d^{2}}}\right)}}}
103:
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31:
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for steels. This feature contributed to its early adoption over competing hardness tests.
8:
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678:"EN ISO 6506-1:2014: Metallic materials – Brinell hardness test – Part 1: test method"
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149:) force. For softer materials, a smaller force is used; for harder materials, a
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719:"ASTM E10-14: Standard method for Brinell hardness of metallic materials"
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862:
Brinell
Hardness Test – Methods, advantages, disadvantages, applications
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in 1900, it was the first widely used and standardised hardness test in
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Correspondent relations among scale, indenter and test force:
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HBW is calculated in both standards using the SI units as
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Note: Standard test conditions unless otherwise stated
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The
Brinell hardness number can be correlated with the
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The hardness may also be shown as XXX HB YY
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130:The typical test uses a 10 mm (0.39 in)
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30:"BHN" redirects here. For other uses, see
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614:Quenched and tempered steel wear plate
439:. It could be a maximum or a minimum.
255:= applied load in kilogram-force (kgf)
249:BHN = Brinell Hardness Number (kgf/mm)
137:ball as an indenter with a 3,000
832:
778:
890:Brinell Hardness HB conversion chart
878:Rockwell to Brinell conversion chart
892:(MPa, Brinell, Vickers, Rockwell C)
24:
886:(Vickers, Brinell, Rockwell B,C,D)
868:Video on the Brinell hardness test
25:
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884:Struers hardness conversion table
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422:
50:
804:"AISI Type 304 Stainless Steel"
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418:= diameter of indentation (mm)
267:= diameter of indentation (mm)
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1:
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7:
839:. Oxford University Press.
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412:= diameter of indenter (mm)
261:= diameter of indenter (mm)
10:
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750:Leeb rebound hardness test
628:600–900 HB (HBW 10/3000)
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880:(Brinell, Rockwell A,B,C)
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512:Brinell hardness numbers
276:ultimate tensile strength
27:Brinell scale of hardness
406:= applied load (newtons)
808:ASM Material Data Sheet
836:The Hardness of Metals
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236:
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911:Dimensionless numbers
833:Tabor, David (2000).
810:. n.d. Archived from
760:Vickers hardness test
451:Diameter of Indenter
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237:
40:
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104:Johan August Brinell
82:indentation hardness
32:BHN (disambiguation)
745:Knoop hardness test
740:Hardness comparison
545:2.6–7.0 HBS 10/100
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712:ASTM International
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80:characterizes the
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814:on 1 October 2018
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581:Hardened AW-6060
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297:from brinell and
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86:materials science
16:(Redirected from
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665:International (
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423:Common values
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47:Brinell scale
41:Force diagram
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816:. Retrieved
812:the original
807:
798:
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496:HBW 10/1000
491:14710(1500)
482:HBW 10/1500
477:29420(3000)
468:HBW 10/3000
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141:(29.42
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126:Test details
96:Proposed by
95:
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791:ASTM E10-14
673:) Standard
617:400-700 HB
602:18–8 (304)
505:9807(1000)
460:Test force
280:Meyer's law
108:engineering
900:Categories
779:Tabor 2000
766:References
735:Brinelling
624:tool steel
593:Mild steel
112:metallurgy
660:Standards
622:Hardened
583:Aluminium
562:Aluminium
520:Hardness
364:−
349:−
335:π
210:−
195:−
181:π
729:See also
648:4600 HB
638:1550 HB
606:annealed
541:Hardwood
526:Softwood
517:Material
132:diameter
101:engineer
873:YouTube
609:200 HB
597:120 HB
528:(e.g.,
399:where:
245:where:
98:Swedish
92:History
18:Brinell
916:Scales
843:
818:28 May
587:75 HB
576:35 HB
572:Copper
566:15 HB
462:N/kgf
634:Glass
560:Pure
457:F/D2
321:0.102
135:steel
841:ISBN
820:2019
551:Lead
530:pine
110:and
45:The
871:on
671:CEN
667:ISO
502:10
499:10
488:15
485:10
474:30
471:10
453:mm
315:HBW
287:HBW
164:BHN
147:lbf
139:kgf
120:ksi
118:in
116:UTS
902::
806:.
714:)
143:kN
88:.
849:.
822:.
793:.
721:.
704:.
696:.
688:.
680:.
532:)
437:D
433:D
416:d
410:D
404:F
380:)
372:2
368:d
359:2
355:D
346:D
342:(
338:D
330:F
327:2
318:=
299:W
295:B
291:H
289:(
265:d
259:D
253:P
226:)
218:2
214:d
205:2
201:D
192:D
188:(
184:D
176:P
173:2
167:=
76:/
73:l
70:ɛ
67:n
64:ˈ
61:ə
58:r
55:b
52:/
34:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
