Standard Reference Materials - Certification Report for SRM 2237, 2238, 2239: RHS (Miniaturized) Charpy V-Notch Impact Specimens

Published

May 11, 2021

Author(s)

Enrico Lucon, Raymond L. Santoyo, Jolene D. Splett

Abstract

This Certification Report documents the procedures used to develop certified values of absorbed energy (KV) for the following RHS (Reduced Half-Size)-type miniaturized verification Charpy V-notch impact specimens: • SRM 2237 (low-energy level, KV = 3.87 J) • SRM 2238 (high-energy level, KV = 14.01 J) • SRM 2239 (super-high energy level, KV = 35.26 J). Certified values were obtained from the statistical analysis of a large number of impact tests performed on RHS specimens by means of a tabletop small-scale Charpy machine at NIST in Boulder, Colorado. The RHS specimens tested were machined from previously tested (broken) full-size Charpy V-notch verification specimens with energy levels corresponding to low energy (SRM 2092), high energy (SRM 2096), and super-high energy (SRM 2098). This report is intended to provide outside observers with accurate and detailed information on how the materials were certified and how the certification program was conducted. All certified values were established at room temperature (21 °C ± 1 °C).

Citation

Special Publication (NIST SP) - 260-211

Report Number

260-211

NIST Pub Series

Special Publication (NIST SP)

Pub Type

NIST Pubs

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Keywords

Charpy testing, indirect verification, MCVN, miniaturized Charpy specimens, RHS, small specimens, small-scale impact testers

Citation

Lucon, E. , Santoyo, R. and Splett, J. (2021), Standard Reference Materials - Certification Report for SRM 2237, 2238, 2239: RHS (Miniaturized) Charpy V-Notch Impact Specimens, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932304 (Accessed October 22, 2025)