27th International Forum for Materials Testing

Transkript

1 27th International Forum for Materials Testing -Inter laboratory test on metal tensile specimens- New results from the last proficiency tests presented by the example of an EA highlighted proficiency test Ulm Tuesday, 16. October 2018 Dipl.-Ing. Christian Weißmüller / Christoph Sieg 1

2 IfEP GmbH Since 2000; accredited 2005 Since 2004 Since 2008; accredited

3 PT 1623: Tensile test reinforcement bars 6 x mm BST 500, diameter 12 mm 76 labs 76 accredited Values: R eh / R m / A / A gt / m E 3

4 PT 1623: Tensile test reinforcement bars 4

5 PT 1623: EA WG: ILC in testing IfEP is active since : Proposal 2015 in Geneva Accepted 2016 in London Results discussed 2017 in Athens GOAL: Ensure the comparability between the MLA members 5

6 PT scheme: IfEP Tensile test Steel for the reinforcement (EN ISO , EN ISO ) Applications: Country Number Austria 23 Belarus 1 Belgium 2 Estonia 1 Finland 1 France 2 Germany 10 Greece 1 Italy 5 Jordan 1 Lithuania 2 Malaysia 1 Netherlands 2 Portugal 5 Serbia 1 Slovenia 3 Spain 6 Sweden 8 Switzerland 2 Turkey 1 Country Number of accredited labs for the measurement proposed by the PT Confirmed registration to the AB Austria 25 Belarus Belgium Croatia Cyprus Czech 21 Republic Estonia 2 1 Finland 6 3 France Germany Greece Israel Italy 41 5 Lithuania 3 2 Malta 0 0 Macedonia Poland Portugal 10 3 / 4 Romania Serbia Slovenia 6 4 Spain 13 Sweden 17 6 Switzerland Turkey 6

7 PT scheme: IfEP Tensile test Steel for the reinforcement (EN ISO , EN ISO ) Applications: 7

8 PT 1623: Tensile test reinforcement bars 6 x mm BST 500, diameter 12 mm 76 labs 76 accredited Values: R eh / R m / A / A gt / m E 8

9 PT 1623: Tensile test reinforcement bars: Homogeneity 29 Specimens Goal: SD R m under 1 % 9

10 PT 1623: Tensile test reinforcement bars: Aquisation 10

11 PT 1623: Tensile test reinforcement bars: assessment criteria 11

12 PT 1623: Tensile test reinforcement bars: niqr 12

13 PT 1623: Tensile test reinforcement bars: results 13

14 PT 1623: Tensile test reinforcement bars: results 14

15 Prozentuale Bruchdehnung A / Percentage elongation after fracture A in % PT 1623: Tensile test reinforcement bars: results: A 28,0 27,5 27,0 26,5 26,0 25,5 Lab. 245: 33,3 %; Lab. 239, Lab. 596: keine Angaben/no results Z = 3 Z = 2 25,0 24,5 24,0 23,5 Median 23,0 22,5 22,0 21,5 21,0 Z = -2 Z = -3 20,5 20,0 Labor-Nr. / Laboratory Code 15

16 EP 1623: ZV Betonstahl: Ergebnisse: A ISO , 5.3 Test procedure 16

17 c a d b b a c EP 1623: ZV Betonstahl: Results: A gt Prozentuale Gesamtdehnung bei Höchstkraft A gt / Percentage total extension at maximum force A gt in % 17,5 17,0 16,5 16,0 15,5 15,0 14,5 14,0 13,5 13,0 12,5 12,0 11,5 11,0 10,5 10,0 9,5 9,0 8,5 8,0 7,5 7,0 6,5 6,0 5,5 Lab. 132: 19,7 %; Lab. 138: 20,6 %; Lab. 245: 21,2 %; Lab. 322: 25,9 %; Lab. 114, Lab. 239, Lab. 324, Lab. 429: keine Angaben/no results Z = 3 Z = 2 Median Z = -2 Z = -3 Labor-Nr. / Laboratory Code 17

18 c a b d b a c in MPa EP 1623: ZV Betonstahl: Results : R m Lab. 73: 754,7 MPa; Lab. 132: 710,1 MPa; Lab. 239: 737,3 MPa; Lab. 243: 558,8 MPa; Lab. 324: 726,8 MPa Zugfestigkeit R m / Tensile strength R m Z = 3 Z = 2 Median Z = -2 Z = Labor-Nr. / Laboratory Code 18

19 a b 654c d b 653a 653c in MPa EP 1623: ZV Betonstahl: Results : R eh Obere Streckgrenze R eh / Upper yield strength R eh Lab. 73: 648,0 MPa; Lab. 114: 466,2 MPa; Lab. 132: 614,4 MPa; Lab. 243: 474,3 MPa; Lab. 324: 610,4 MPa; Lab. 239: keine Angaben/no results Z = 3 Z = 2 Median Z = -2 Z = -3 Labor-Nr. / Laboratory Code 19

20 Summary It is possible, but laborious to produce homogeneous specimens out of reinforcement steel, The evaluation of the value Elongation show room of improvement in relation to rues given by the standard, All the pother values show comparable results, however they will not be able support or confirm the MLA. 20

21 IfEP GmbH Daimlerstraße Marl Germany Tel ifep@online.de the international database for certified reference materials 21