Final Report 1102 Haertepruefung Rockwell HRC 2011, KONTROLLIERT

1

Proficiency test

Rockwell HRC Hardness Test

EN ISO 6508-1

1102

HRC-2011

Final Report

February, 10th 2012

Institut für Eignungsprüfung GmbH Daimlerstraße 8, D-45770 Marl

Organization und performance Dipl.-Ing. C. Weißmüller; Programme Coordinator Prof. Dr.-Ing. H. Frenz Dipl.-Ing. E. Krämer

Advisory Board Dipl.-Ing. J. Adelmann; MPA / TU Darmstadt, Germany Dipl.-Ing. H.-J. Malitte; BAM, Berlin, Germany Dipl.-Ing. J. Triebel; DAkkS GmbH, Sector committee material science/mat. testing

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Content

1 Introduction ....................................................................................................... 5

2 Proficiency test programme ............................................................................. 6

2.1 Introduction and definition of test procedure .................................................. 6

2.2 Participants .................................................................................................... 6

2.3 Test material .................................................................................................. 7

3 Evaluation of the proficiency test .................................................................... 8

4 Results ............................................................................................................... 9

4.1 Hardness measurement HRC (test task A) ................................................. 10

4.1.1 Error of the hardness testing machine .................................................. 10

4.1.2 Permissible repeatability ....................................................................... 13

4.2 Determination of the expanded measurement uncertainty .......................... 14

4.2.1 Measurement uncertainty method 1 according to EN ISO 6508-1

(informative) .......................................................................................... 14

4.2.2 Expanded measurement uncertainty, statements of the laboratories

(informative) .......................................................................................... 15

5 Summary .......................................................................................................... 16

6 Literature .......................................................................................................... 19

7 Participants ...................................................................................................... 20

Appendix A

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5

1 Introduction

In 2011 the Institut für Eignungsprüfung (IfEP GmbH) organised a proficiency test in

the testing field “Rockwell HRC Hardness Test (HRC-2011)” as per

EN ISO 6508-1 [1].

The participation in this proficiency test was open to accredited and not accredited

laboratories worldwide.

This proficiency test is an important, external element in the quality control of testing

laboratories. It offers a regular examination of the laboratories’ service capability.

This proficiency test was planned, executed, assessed and documented in this report

by IfEP GmbH on the basis of ISO/IEC 17043 “Conformity assessment - General

requirements for proficiency testing” [2].

The programme coordinator for this proficiency test is Dipl.-Ing. Christian Weißmüller,

Daimlerstraße 8, D-45770 Marl, Phone +49 (0) 23 65 / 209 00 09.

This final report comprises of 34 pages in total (24 pages in the report and

10 pages as appendix) and was approved by the institute’s management.

The purpose of this report is the presentation of results and performance of the

participants. The report is valid with certificate only. A third party issuing of the report

is only allowed with permission of IfEP GmbH. The content is not for confidentiality.

6

2 Proficiency test programme

2.1 Introduction and definition of test procedure

This proficiency test is based on the test standard EN ISO 6508-1 [1] and is designed

according to ISO/IEC 17043 [2] and ISO 13528 [3].

The participants got certified reference hardness blocks with three different levels of

hardness (25 HRC, 45 HRC, 64 HRC) of the MPA NRW Dortmund, Germany, as well

as one material specimen.

The participants had to perform the following tasks:

• Test task A

Hardness measurement HRC according to EN ISO 6508-1 [1],

five indentations on each of the three certified reference blocks

• Test task B

Preparation of the delivered specimen and hardness testing according to

EN ISO 6508-1 [1], five indentations HRC and statement of the measurement

uncertainty (informative).

2.2 Participants

99 laboratories located in 24 different countries (table 1) participated in the

proficiency test. Two laboratories participated with two locations.

Table 1: Participants‘ locations

Austria 5 Greece 2 Romania 1

Belgium 3 Italy 14 Slovakia 2

Bosnia-Herzegovina 1 Netherlands 2 Slovenia 2

Denmark 1 Norway 1 South Africa 1

Finland 1 P.R. China 1 Spain 7

France 3 Pakistan 1 Sweden 2

Germany 39 Portugal 3 Switzerland 2

Great Britain 2 Qatar 1 Turkey 2

80 participants indicated that they held an accreditation in accordance with

EN ISO/IEC 17025 [4] while the proficiency test took place.

7

These data are for information only. In this report it is not checked, if, for example,

there is a significant correlation between the fact of an accreditation and the results

yielded during this proficiency test.

2.3 Test material

For test task A 9 reference hardness block sets certified by the MPA NRW Dortmund,

Germany, (see table 2, „soft“ = „w“, „medium“ = „m“ and „hard“ = „h“) were used.

As material for the specimens of test task B served nine additional specimens with a

hardness of approximately 46 HRC.

Table 2: Certified reference values of the reference hardness blocks (HVP)

HVP IfEP HRC Pl.

Hardness value in HRC

U

in HRC*

W1-2011 25,12 0,31

W2-2011 25,19 0,31

W3-2011 25,74 0,30

W4-2011 25,87 0,30

W5-2011 25,55 0,32

W6-2011 25,50 0,30

7-2011-W 26,02 0,30

8-2011-W 25,07 0,30

9-2011-W 24,90 0,33

M1-2011 46,73 0,30

M2-2011 46,67 0,30

M3-2011 46,70 0,30

M4-2011 46,71 0,30

M5-2011 46,59 0,31

M6-2011 46,80 0,32

7-2011-M 46,85 0,30

8-2011-M 46,87 0,30

9-2011-M 47,01 0,31

8

Table 2: Certified reference values of the reference hardness blocks (HVP), continued

HVP IfEP HRC Pl.

Hardness value in HRC

U

in HRC*

H1-2011 64,79 0,30

H2-2011 64,93 0,30

H3-2011 65,01 0,30

H4-2011 64,69 0,30

H5-2011 64,42 0,30

H6-2011 64,75 0,30

7-2011-H 65,62 0,30

8-2011-H 65,60 0,30

9-2011-H 65,47 0,30

*Expanded measurement uncertainty U with k = 2 and p = 95 %.

3 Evaluation of the proficiency test

The test task A has been evaluated according to EN ISO 6508-2 [5], table 5

(permissible repeatability of the testing machine r and error of the testing machine E).

Test task B served exclusively for the calculation of the measurement uncertainty and

was not assessed.

The error of the testing machine (E) results from equation (1):

CRMXHE −= (1)

The permissible error (1a) is stated in EN ISO 6508-2 [5], table 5:

HRCEHRC 5,15,1 ≤≤− (1a)

H is the (arithmetic) mean value of the measurements on a reference hardness

block.

CRMX is the certified reference value of this hardness block.

The repeatability (r) is calculated according to equation (2):

minmax HHr −= (2)

min/maxHis the maximum / minimum measured hardness in HRC.

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The permissible repeatability is determined according to EN ISO 6508-2 [5], table 5,

by the requirements (2a) resp. (2b):

)100(02,0 Hr −⋅≤ (2a)

HRCr 8,0≤ (2b)

The bigger one of the two values must be considered for the assessment.

For the evaluation of the proficiency test the equations (2a) and (2b) were changed in

a way that applies:

0)]100(02,0[ ≤−⋅−=∆ Hr (3a)

08,0 ≤−=∆ HRCr (3b)

∆ [HRC] is a measure for the deviation of the repeatability of a laboratory from the

permissible repeatability.

The assessment of this proficiency test happens for the two parameters (E and r) of

each hardness level individually with „satisfactory“ or „unsatisfactory“.

4 Results

The results of this proficiency test are summarized in the tables 3 to 8 and are

presented in graph form in appendix A. 101 laboratories stated results.

For a better respresentation the results in this chapter are rounded to the last digit.

10

4.1 Hardness measurement HRC (test task A)

4.1.1 Error of the hardness testing machine

The laboratories listed in tables 3 to 5 achieved a result with a deviation from the

reference value which does not fulfill the requirement (1a).

Table 3: Error of the hardness testing machine on the 25 HRC level; Laboratories with the result „unsatisfactory“

Lab.-Code Deviation in HRC

2 2,2

9 -2,3

10 2,0

14 -1,6

23 -2,5

34 1,7

74 -2,1

76 -1,8

133 -2,1

155 2,3

269 2,1

277 2,3

279 19,6

280 -1,6

314 1,6

369 -1,6

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2 3,3

15 -2,5

18 -1,7

23 -2,7

33 -1,7

38 -2,5

58 -2,8

69 -3,2

145 -2,3

269 2,0

279 13,1

280 -2,4

297 -1,6

312 -2,1

313 -1,9

362 -1,6

372 -2,0

12



4 -1,8

8 1,6

15 -3,6

23 -2,4

38 -3,5

41 -1,9

58 -1,8

69 -1,7

279 9,6

280 -2,7

293 -2,1

297 -1,7

313 -2,2

338 -1,6

In the figures A1, A3 and A5, appendix A, these results are presented in graph

form.

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4.1.2 Permissible repeatability

Laboratories listed in tables 6 to 8 achieved a result whose repeatability is bigger

than the permissible repeatability. This is the case when the value ∆ [HRC] exceeds

zero. All results wich are equal to zero or which are below the zero line fulfill the

requirements of the proficiency test.

Table 6: Repeatability of the testing machine on the 25 HRC level; Laboratories with the result „unsatisfactory“

Lab.-Code ∆∆∆∆ in HRC

15 0,5

57 2,1

68 0,5

338 0,5

352 0,1



2 0,9

15 0,9

18 0,5

38 4,9

145 0,8

269 1,6

279 1,4

312 5,9

314 0,4

372 0,4

14



2 2,6

18 0,1

38 1,2

65 0,1

68 0,2

155 0,1

269 0,2

272 0,2

279 0,1

297 0,2

313 0,2

314 0,3

338 1,2

346 0,1

352 1,0

929 1,1

In the figures A2, A4 and A6, appendix A, these results are presented in graph form.

4.2 Determination of the expanded measurement uncertainty

4.2.1 Measurement uncertainty method 1 according to EN ISO 6508-1 (informative)

The calculation of the measurement uncertainty according to EN ISO 6508-1 [1] is

based on the UNCERT Code of Practice No. 14 [6] and the GUM [7]. They require

measurements on a standard material. The results of these measurements (standard

deviations) are presented in graph form in figure A7, appendix A, for the hardness

measurement HRC.

For the laboratories the expanded measurement uncertainties for the measurement

on the standard material (test task B) have been calculated according to the

equations (4) and (5) and are shown in figure A10.

2

ms

2

x

2

H

2

CRM

2

Euuuuu2U ++++= * (4)

15

%100*X

UU~

CRM

= (5)

with

U Expanded measurement uncertainty

U~ Relative expanded measurement uncertainty

Eu Standard measurement uncertainty from the error 1 σ of the hardness testing machine

CRMu Standard measurement uncertainty of the reference hardness block

Hu Standard measurement uncertainty of the hardness testing machine during measurement

on the reference hardness block

xu Standard measurement uncertainty during testing of a standard material

msu Standard measurement uncertainty of the hardness testing machine based on the smallest

measuring step

CRM X Certified reference value of the hardness reference block

The minimum value of the relative expanded measurement uncertainty U~ is built by

the sum of the fixed factors uE, uCRM and ums and amounts to approx.

2,2 %. Strictly speaking the values of the measurement uncertainty of the

laboratories who are listed in table 4 (E 45 HRC level) and table 7 (r 45 HRC level)

are not valid, because the limit values with regard to the repeatability (r) and / or

error (E) of the testing machine during the measurement on the certified reference

material have not been maintained. For laboratories who did not make any

statements with regard to the smallest measuring step, the measurement uncertainty

could not be calculated.

4.2.2 Expanded measurement uncertainty, statements of the laboratories

(informative)

For the measurement of the standard material of the test task B the measurement

uncertainty of the measurement should be stated additionally by the laboratories.

The expanded measurement uncertainty U as per method M 1 according to

appendix G of EN ISO 6508-1 [1] should be calculated. In order to carry out a

correct calculation according to equation (4), the value of

UCRM = 0,3 HRC (k = 2 for a confidence level of 95 %) should be used.

99 laboratories stated results. The statements of the laboratories are summarized in

table 9 and presented in appendix A, figure A8 and figure A9, in graph form.

Laboratories who did not state the chosen unit were not taken into consideration.

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Table 9: Statement of the measurement uncertainty by the participants (median)

5 Summary

The proficiency test has been executed by the organiser on three different hardness

levels according to the criteria „Error of the testing machine“ and „Permissible

repeatability of the testing machine“ on the basis of EN ISO 6508-2 [5].

The results of the single test parameters are presented in table 10:

Table 10: Results of the proficiency test

Number of participants

Satisfactory participations

Error of testing machine 25 HRC level 101 84,2 %



Repeatability 25 HRC level 101 95,0 %



In table 11 are listed the laboratories who achieved results which were unsatisfactory

at least for one of the parameters to be tested in terms of this proficiency test.

The participation in the proficiency test is to be considered satisfactory as a whole,

if a participant has achieved not more than one unsatisfactory result.

For all laboratories who are not mentioned in table 11 applies, that they participated

in this proficiency test with all stated results successfully.

Parameter Minimum Maximum Median

Expanded measurement uncertainty in HRC 0,2 2,9 1,2

Expanded measurement uncertainty in % 0,1 4,0 2,6

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Table 11: Laboratories with at least one unsatisfactory result

Lab.-Code E25 r25 E45 r45 E64 r64 Assessment

2 X X X X NE

4 X E

8 X E

9 X E

10 X E

14 X E

15 X X X X NE

18 X X X NE

23 X X X NE

33 X E

34 X E

38 X X X X NE

41 X E

57 X E

58 X X NE

65 X E

68 X X NE

69 X X NE

74 X E

76 X E

133 X E

145 X X NE

155 X X NE

269 X X X X NE

272 X E

277 X E

279 X X X X X NE

280 X X X NE

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Table 11: Laboratories with at least one unsatisfactory result, continued

Lab.-Code E25 r25 E45 r45 E64 r64 Assessment

293 X E

297 X X X NE

312 X X NE

313 X X X NE

314 X X X NE

338 X X X NE

346 X E

352 X X NE

362 X E

369 X E

372 X X NE

929 X E

E25/45/64 Permissible error on hardness level 25 / 45 / 64 HRC r25/45/64 Repeatability on hardness level 25 / 45 / 64 HRC X Result unsatisfactory E Satisfactory participation in the whole proficiency test NE Unsatisfactory participation in the whole proficiency test

81 participants (80 %) took part satisfactory in the proficiency test,

20 participants obtained two or more unsatisfactory results.

The determination of the measurement uncertainty follows the actual valid approach

of the ISO standardization.

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6 Literature

[1] EN ISO 6508-1:2006, Metallic materials - Rockwell hardness test - Part 1:

Test method (scales A, B, C, D, E, F, G, H, K, N, T). Beuth Verlag, Berlin,

March 2006.

[2] ISO/IEC 17043:2010, Conformity assessment - General requirements for

proficiency testing. International Organization for Standardization, Geneva,

February 2010.

[3] ISO 13528:2005, Statistical methods for use in proficiency testing by

interlaboratory comparisons. International Organization for Standardization,

Geneva, September 2005.

[4] EN ISO/IEC 17025:2005, General requirements for the competence of testing

and calibration laboratories. Beuth Verlag, Berlin, August 2005.

[5] EN ISO 6508-2:2006, Metallic materials - Rockwell hardness test - Part 2:

Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H,

K, N, T). Beuth Verlag, Berlin, March 2006.

[6] Gabauer, W., Manual of Codes of Practice for the Determination of

Uncertainties in Mechanical Tests on Metallic Materials, The Estimation of

Uncertainties in Hardness Measurements, Project, No. SMT4-CT97-2165,

UNCERT COP 14:2000.

[7] BIPM, IEC, IFCC, ISO, IUPAC, OIML: Guide to the Expression of Uncertainty

in Measurement. ISO, Geneva, Switzerland; First Edition (1993).

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7 Participants

There is no relation between the laboratory code and the position on the

following list. This list is based on a declaration of agreement of the laboratories.

8 of the 99 laboratories who stated results did not want to be named in this table or

did not give any clear agreement.

A.Q.C. S.r.l. Napoli Italy A.U.E.M. Atelier d'Usinage et d'Essais Mécaniques

Denain France

AB Sandvik Materials Technology (SMT) Sandviken Sweden Adolf Würth GmbH & Co. KG Künzelsau-Gaisbach Germany Aequalis S.r.l. Pontedera Italy AG der Dillinger Hüttenwerke Dillingen/Saar Germany AIMME - Asociación de Investigación de la Industria Metalmecánica, Afines y Conexas

Paterna (Valencia) Spain

AISICO S.r.l. Anagni (FR) Italy AREVA NP GmbH Erlangen-Eltersdorf Germany Arsenal do Alfeite, S. A. Almada Portugal Azterlan Metallurgy Research Center Durango (Bizkaia) Spain

BAM Bundesanstalt für Materialforschung und -prüfung

Berlin Germany

Berdan Bolts, Nuts & Studbolts Company Ltd

Huzurkent/Tarsus/Mersin Turkey

Bochumer Eisenhütte, Heintzmann GmbH & Co. KG

Bochum Germany

Bochumer Verein Verkehrstechnik GmbH

Bochum Germany

Böhler Edelstahl GmbH & Co KG Kapfenberg Austria BÖHLER-UDDEHOLM Precision Strip GmbH

Böhlerwerk Austria

Bucyrus Europe GmbH Lünen Germany Buderus Edelstahl GmbH Wetzlar Germany Butting GmbH & Co. KG Knesebeck Germany C.T.R. S.r.l. Unipersonale (Exova Italia) Limena (PD) Italy CATIM Porto Portugal

CERMET Soc.Cons. a r. l. Cadriano di Granarolo E. (BO)

Italy

CEWAC Centre d'etudes wallon asbl Ougree Seraing Belgium CSSN - Centro di Supporto e Sperimentazione Navale (Italian Navy)

La Spezia Italy

Danish Technological Institute Aarhus C Denmark EADS-CCQ Institut de Soudure QSTP-LLC

Doha Qatar

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EURO-LABOR GmbH Bochum Germany EWIS AG Lübeck Germany Exova AS Sandnes Norway Exova S.r.l. Crema (CR) Italy

Fraunhofer Institut für Zerstörungsfreie Prüfverfahren IZFP

Saarbrücken Germany

Freudenberg Forschungsdienste KG Weinheim Germany Fundación Cetena (CEMITEC) Noain (Navarra) Spain Grupo Antolin-Ingeniería, S.A. Burgos Spain IMA Materialforschung und Anwendungstechnik GmbH

Dresden Germany

imq-Ingenieurbetrieb für Materialprüfung, Qualitätssicherung und Schweißtechnik GmbH

Crimmitschau Germany

Institute of Metals and Technology (IMT) Ljubljana Slovenia ISQ Instituto De Soldadura E Qualidade Porto Salvo Portugal Keighley Laboratories Ltd Keighley, West Yorkshire Great Britain KIMI S.A. Perama Greece KraussMaffei Technologies GmbH München-Allach Germany Laboratoires POURQUERY Lyon Cedex France Laboratorio de Ensayos, Corrosión y Protección de la Universidad de Cádiz (LABCYP)

Puerto Real Spain

MAGNA Powertrain AG & Co KG Lannach Austria MAGNA STEYR Fahrzeugtechnik AG & Co KG

Graz Austria

Materiaal Metingen Testgroep B.V. BM Ridderkerk Netherlands Materialprüfungsanstalt Universität Stuttgart (MPA Stuttgart)

Stuttgart Germany

Metal Test Certificated MTC s.r.l. Avigliana TO Italy Meyer Werft GmbH Papenburg Germany Mike Schreiber Chemnitz Germany Modena Centro Prove s.r.l. Modena (MO) Italy

MPA Materialprüfungsanstalt Bremen, Stiftung Institut für Werkstofftechnik

Bremen Germany

N.M.B.S. Holding Brüssel Belgium NMi Nederland b.v. EG Dordrecht Netherlands NUTECH GmbH Neumünster Germany Peiner Umformtechnik GmbH Peine Germany PLANSEE SE Reutte Austria PUBLIC POWER CORPORATION S.A. (PPC S.A.)

Kanza Pallini / Athens Greece

Roto Frank AG Leinfelden-Echterdingen Germany RUAG Schweiz AG/RUAG Defence Thun Switzerland

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S.C. IMA-METAV S.A./ S.C. lntreprinderea Metalurgica pentru Aeronautica S.A.

Bucharest Romania

Saarstahl AG Völklingen Germany Salzgitter Mannesmann Grobblech GmbH

Mülheim an der Ruhr Germany

Sandvik P&P, ZN der Sandvik Materials Technology Deutschland GmbH

Werther Germany

SGS Tecnos, S.A. Madrid Spain

SIDER TEST s.r.l. Castel San Giovanni (Piacenza)

Italy

sirris Gent - Zwijnaarde Belgium Special Testing Ltd Sheffield Great Britain Staatliche Materialprüfungsanstalt Darmstadt

Darmstadt Germany

Steel Trattamenti Termici S.r.l. Motta di Livenza Italy ŠTORE STEEL d. o. o. Štore Slovenia Swiss Steel AG Emmenbrücke Switzerland TAZ GmbH Eurasburg Germany Technical Services Centre TSC, PSQCA Lahore Pakistan Turkish Standards Institution TSE Kocaeli Turkey TÜV SÜD Industrie Service GmbH München Germany University of Zenica, Metallurgical Institute "Kemal Kapetanovic" Zenica

Zenica Bosnia-Herzegovina

Valinox Nucléaire Montbard Cedex France Vattenfall Europe PowerConsult GmbH Peitz Germany

VOLKSWAGEN Automatic Transmission (Dalian) Co., Ltd.

Dalian P. R. China

Volkswagen Group of South Africa Uitenhage South Africa Volkswagen SLOVAKIA, a.s. Bratislava Slovakia VTT Technical Research Centre of Finland

VTT Finland

VUJE Inc. Trnava Slovakia W.S. Werkstoff Service GmbH Essen Germany Werkstoffprüfung Dipl.-Ing. Frank Berg GmbH

Schwerte Germany

Werkstoffprüfung Kunze GmbH Hagen Germany WTL Werkstofftechnik-Labor GmbH Aalen Germany Zentrallabor Siegerland Freudenberg Germany ZF Friedrichshafen AG Friedrichshafen Germany

23

Appendix A

Content Figure Page

Error of the testing machine A1, A3, A5 A-1, A-3, A-5

Repeatability A2, A4, A6 A-2, A-4, A-6

Standard deviation on the standard material (test task B; informative)

A7 A-7

Expanded measurement uncertainty, statements of the laboratories

A8 – A9 A-8 – A-9

Determination of the measurement uncertainty according to EN ISO 6508-1

A10 A-10

24


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279

Abweichung der Prüfmaschine /

Error of the testing machine

in HRC

Labor-Nr. / Laboratory Code

Grenzabweichung / Permissible error = 1,5 HRC

Grenzabweichung / Permissible error = - 1,5 HRC

Lab 279: 19,6 HRC

Bild / Figure A1: Prüfaufgabe A, 25 HRC-Niveau: Abweichung der Prüfmaschine Task A, 25 HRC-Level: Error of the testing machine

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∆∆ ∆∆in HRC


∆ = (Wiederholpräzision - zulässige Wiederholpräzision) ≤ 0

∆ = (Repeatability - permissible repeatability) ≤ 0

Lab 57: 2,1 HRC

Bild / Figure A2: Prüfaufgabe A, 25 HRC-Niveau: Wiederholpräzision Task A, 25 HRC-Level: Repeatability

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in HRC




Lab 2: 3,3 HRC; Lab 69: -3,2 HRC; Lab 279: 13,1 HRC


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61

36

53a

293

53b

75

79

66

11

116

62

42

73

56

77a

28

77b 8

340

34

64 3

135

54

51

369

178

114

55

72

122

57

63

32

132

139

133

74

19

341

35

60 4 5

295

352

160

10

313

33

41

71

148

294

156

263

59

49

304

179

346

67

278

29

159

338

155

23

27

69

280

272

297

259

137

929

154

362

372

314

18

145

15 2

279

269

38

312

∆∆ ∆∆in HRC




Lab 38: 4,9 HRC; Lab 312: 5,9 HRC


Seite / Page A-5

-3,0

-2,0

-1,0

0,0

1,0

2,0

3,0

15

38

280

23

313

293

41 4

58

69

297

338

372

295 3

135

272

19

27

71

362

29

145

63

263

11

76

277

149

139

278

79

114

133

60

259

346

33

179

74

148

35

116

929

55

72

314

57

53a

155

53b

75

18

42

329

54

178

341

34

14

59

51

64

66

73

261

159

77b

294

304

61 2

56

340

49

36

137

67

13

10 9

122 5

24

154

160

77a

156

352

65

28

312

21

132

369

68

32

269

62 8

279



in HRC




Lab 15: -3,6 HRC; Lab 38: -3,5 HRC; Lab 279: 9,6 HRC


Seite / Page A-6

-1,0

-0,5

0,0

0,5

1,0

1,5

15

24

58

154

277

13

132 9

49

53b

53a

114

293

67

72

77a

139

21

340

34

62

14

116

28

41

75

76

261

329

32

36

57

369

73

149

10

79

61 3 8

133

160 5

63

35

60

178

362

71

23

51

54

11

294

159

64

145

304

278

55

77b

19 4

69

156

280

312

372

137

259

295

42

56

341

29

122

27

33

59

263

66

74

179

148

135

18

346

65

279

155

297

269

313

68

272

314

352

929

338

38 2

∆∆ ∆∆in HRC




Lab 2: 2,6 HRC


Seite / Page A-7

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

1,8

2,0

75

341

139

42

53b

29

49

34

59

340

63

56

65 8

54

71

72

32

295

67

53a

148

77b

11

294

77a

73

261

76

313

346

329

64

19

116 3

61

179

362

66

122

372

293

55

304

278

62

60

369

35

259

178

159

352

160

57

10

314

279

133

132

74

36

155

145

13 2

263

33

28

69

137

27

58

272

277

280

18

41

149

79

338

114

269

15

24

68

156

297

312 4

154

21

23

135

14 5

38

51

929 9

Standardabweichung/Standard deviation

in HRC


Lab 9: 2,83 HRC

Bild / Figure A7: Prüfaufgabe B: Prüfung des Vergleichsmaterials, Standardabweichung (informativ) Task B: Testing of standard material, standard deviation (informative)

Seite / Page A-8

0,0

0,5

1,0

1,5

2,0

2,5

3,0

3,5

4,0

4,5

5,0

65

29

63

60

36

27

87

33

41

68

62

27

9 41

45

17

81

52

45

15

3a

53

b2

93

19

42

13

51

59

29

47

15

43

27

67

7a

13

9 85

66

47

23

29

34

0 33

57

7b

29

54

95

55

76

66

71

60

26

12

77

36

27

91

14

34

33

85

92

63

13

12

21

33

31

23

14

37

21

32

15

54

11

16

58

61

69

74

26

92

80

29

72

72

21 2

14

81

56

25

91

81

79

31

33

46

75

11

13

7 53

82

39

29

10 9

Messunsicherheit / Measurement uncertainty

in HRC


± 1,2 HRC

Median

Bild / Figure A8: Erweiterte Messunsicherheit in HRC, Angaben der Laboratorien Expanded measurement uncertainty in HRC, statements of the laboratories

Seite / Page A-9

0,0

0,5

1,0

1,5

2,0

2,5

3,0

3,5

4,0

4,5

5,0

36

9

33

14

9

27

14

28

15

4

Messunsicherheit / Measurement uncertainty

in %


± 2,6 %

Median

Bild / Figure A9: Erweiterte Messunsicherheit in %, Angaben der Laboratorien Expanded measurement uncertainty in %, statements of the laboratories

Seite / Page A-10

2,0%

3,0%

4,0%

5,0%

6,0%

7,0%

8,0%

65

34

56

11

67

35

57

66

0 83

5 37

7b

27

93

24

27

7a

31

36

17

56

36

43

40

53

b7

25

91

12

61

32

94

91

48

53

a1

02

95

13

96

26

65

43

62

71

16

06

73

04

57

13

21

92

94

27

35

21

33

69

17

93

61

55

29

58

27

83

46

26

31

33

15

44

17

92

59

18

14

91

56

34

11

22

31

43

38

11

4 41

37

28

37

22

77 2

33

29

72

41

45

26

92

80

23

15

14 5

51

92

93

12

38 9

69

21

17

82

72

13

52

93

74

Relative Messunsicherheit / relative measurement

uncertainty in %

Labor Nr. / Laboratory Code

Lab 21: 23,4 %; Lab 69: 13,3 %; Lab 74: 26,2 %; Lab 135: 23,9%;

Lab 178: 23,6 %; Lab 272: 23,8 %; Lab 293: 25,5 %

Lab 68; Lab 159: nicht alle nötigen Angaben vorhanden / not

sufficient information available

Bild / Figure A10: Prüfaufgabe B: Messunsicherheit Methode 1, DIN EN ISO 6508-1 Ende des Berichts Task B: Measurement uncertainty Method 1, EN ISO 6508-1 End of the report

Final Report 1102 Haertepruefung Rockwell HRC 2011, KONTROLLIERT

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