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Certification of Charpy V-notch reference test pieces of 80 J nominal absorbed energy
Certified reference material ERM-FA015w
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This certification report describes the processing and characterisation of ERM-FA015w, 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 1) or according to ISO 148-2 (Metallic materials - Charpy pendulum impact test – Part 2: Verification of test machines 2). The certified value for KV (= energy required to break a V-notched test piece using a pendulum impact test machine) is 81.2 J. The associated expanded uncertainty (2.8 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 3 and ISO 148-1 4. The certified value of ERM-FA015w is traceable to the SI, via the SItraceable certified value of the master batch ERM-FA015v, by testing samples of ERM-FA015v and ERM-FA015w 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.
Book Details
Authors
European Commission and Joint Research Centre
Publishers
Publication year : 2010
License: All rights reserved ©
Times read: 0
