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FP7

Certification of Charpy V-notch reference test pieces of 30 J nominal absorbed energy, ERM-FA013bc

Funded under: FP7-JRC

Abstract

This certification report describes the processing and characterisation of ERM-FA013bc, a batch of Charpy V-notch certified reference test pieces. Sets of five of these test pieces are used for the verification of pendulum impact test machines according to EN 10045-2 (Charpy impact test on metallic materials, Part 2. Method for the verification of impact testing machines) or according to ISO 148-2 (Metallic materials - Charpy pendulum impact test - Part 2: Verification of test machines). The certified value for KV (= energy required to break a V-notched test piece using a pendulum impact test machine) is 26.5 J. The associated uncertainty (0.9 J, k = 2 corresponding to a confidence level of 95 %) is calculated for the mean of a set of five test pieces. The absorbed energy (KV) is procedurally defined and refers to the impact energy required to break a V-notched bar of standardised dimensions, as defined in EN 10045-1 and ISO 148. The certified value of ERM-FA013bc is traceable to the SI, via the SI-traceable certified value of the master batch ERM-FA013ba, by testing samples of ERM-FA013ba and ERM-FA013bc in repeatability conditions on an impact pendulum verified and calibrated with SI-traceably calibrated tools. The certified value is valid only for strikers with a 2 mm tip radius. The certified value is valid at (20 =/- 2) C.

Additional information

Authors: ROEBBEN G, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);DEAN A, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE)
Bibliographic Reference: EUR 23939 EN (2009), 27 pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9893 Fax: +39 033278 5409 E-mail: jrc-info@ec.europa.eu or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
ISBN: ISBN: 978-92-79-12851-6
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