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  "doi": "doi:10.18434/mds2-3719",
  "title": "SRM 2564, Lot HH-199, High-Energy Charpy V-Notch Specimens (Self-Verification, 21 \u00b0C, 8 mm Striker)",
  "contactPoint": {
    "fn": "Enrico Lucon",
    "hasEmail": "mailto:enrico.lucon@nist.gov"
  },
  "modified": "2026-10-02",
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  "description": [
    "NIST self-verification Charpy specimens, such as lot HH-199 specimens considered here, are used by\nlaboratories around the world to perform the indirect verification of their Charpy impact machine in\naccordance with ASTM E23 and/or ISO 148-2. For self-verification specimens, customers test between 5 and 7 samples and compare their average value with the NIST certified reference absorbed energy, provided in a certificate that accompanies the samples. If the mean absorbed energy is within the limits specified by the applicable test standard (ASTM or ISO), the machine indirect verification can be considered successful.\nThis record contains the certified value and uncertainty for lot HH-199, and the individual test results obtained from the certification process. More information on the Charpy Machine Verification Program is linked under References."
  ],
  "keyword": [
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    "Charpy",
    "Standard Reference Material (SRM)",
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    "ASTM E23",
    "ISO 148"
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  "publisher": {
    "name": "National Institute of Standards and Technology",
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      "downloadURL": "https://data.nist.gov/od/ds/mds2-3719/2564_Lot_HH-199_Certified_Values.csv",
      "mediaType": "text/csv",
      "title": "Certification results for HH-199",
      "size": 186,
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      "downloadURL": "https://data.nist.gov/od/ds/mds2-3719/2564_Lot_HH-199_Readme.txt",
      "mediaType": "text/plain",
      "title": "README file providing details about this record",
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      "downloadURL": "https://data.nist.gov/od/ds/mds2-3719/2564_Lot_HH-199_Data.csv",
      "mediaType": "text/csv",
      "title": "Raw test results (absorbed energy)",
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  "_editStatus": "done",
  "authors": [
    {
      "familyName": "Lucon",
      "fn": "Enrico Lucon",
      "givenName": "Enrico",
      "middleName": "",
      "affiliation": [
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          "title": "National Institute of Standards and Technology",
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      "fn": "Allen Eckhardt",
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      "familyName": "Koepke",
      "fn": "Amanda Koepke",
      "givenName": "Amanda",
      "middleName": "",
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        {
          "title": "National Institute of Standards and Technology",
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  ],
  "annotated": "2026-10-19T13:06:04.544878",
  "revised": "2026-10-19T13:06:04.544878",
  "issued": null,
  "firstIssued": "2026-10-19T13:06:04.544878"
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