UK’S PROVISION OF PRIMARY HARDNESS STANDARDS

G. C. Stanbury, F. A. Davis

Abstract

As a result of a EUROMET agreement the NPL programme on hardness was discontinued in 1988. Representation from UK industry (equipment manufacturers and users of hardness measurement) through the British Measurement and Testing Association (BMTA) requested that a national centre of hardness measurement and calibration excellence should be re-established in the UK.<BR />This paper describes the UK’s re-establishment of a national system for traceable hardness measurement and the hardness scales supported. Details are presented on two hardness machines designed and built by Instron Ltd. The requirements for the measurement of both indentations and indenters are also discussed. Ancillary equipment has been purchased and modified where necessary for NPL’s use.

Keywords

Hardness, Hardness calibration

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IMEKO-WC-2000-TC5-P173.pdf

DOI

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IMEKO TC

TC5 - Hardness Measurement

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