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  "doi": "doi:10.18434/mds2-3956",
  "title": "SRM 2199, Lot SH-73, Super-High-Energy Charpy V-Notch Specimens\n(Self-Verification, 21 \u00b0C, 2 mm Striker)",
  "contactPoint": {
    "fn": "Enrico Lucon",
    "hasEmail": "mailto:enrico.lucon@nist.gov"
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  "modified": "2025-08-08",
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  "description": [
    "NIST self-verification Charpy specimens, such as lot SH-73 specimens considered here, are used by laboratories around the world to perform the indirect verification of their Charpy impact machine in accordance 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 SH-73, and the individual test results obtained from the certification process. More information on the Charpy Machine Verification Program is linked under References."
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  "keyword": [
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    "Charpy",
    "Standard Reference Material",
    "indirect verification",
    "ASTM E23",
    "ISO 148"
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  "theme": [
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    "Standards: Reference materials"
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  "bureauCode": [
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  "programCode": [
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  "_editStatus": "done",
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      "downloadURL": "https://data.nist.gov/od/ds/mds2-3956/2199_Lot_SH-73_Readme.txt",
      "mediaType": "text/plain",
      "title": "Information about record SH-73",
      "size": 3429,
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      "downloadURL": "https://data.nist.gov/od/ds/mds2-3956/2199_Lot_SH-73_Certified_Values.csv",
      "mediaType": "text/csv",
      "title": "Certified values for SH-73",
      "size": 219,
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      "filepath": "2199_Lot_SH-73_Data.csv",
      "downloadURL": "https://data.nist.gov/od/ds/mds2-3956/2199_Lot_SH-73_Data.csv",
      "mediaType": "text/csv",
      "title": "Certification test results for SH-73",
      "size": 851,
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  "references": [
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      ],
      "@id": "#ref:programs-projects/charpy-machine-verification-program",
      "refType": "IsSupplementTo",
      "location": "https://www.nist.gov/programs-projects/charpy-machine-verification-program",
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      ],
      "title": "New software for the statistical analysis and qualification of NIST Charpy verification specimen lots",
      "issued": "2021-12-06",
      "citation": "Lucon, E. (2021). New software for the statistical analysis and qualification of NIST Charpy verification specimen lots (, Ed.). National Institute of Standards and Technology (U.S.). https://doi.org/10.6028/nist.ir.8211-upd\n"
    }
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  "annotated": "2026-10-22T13:35:57.712903",
  "revised": "2026-10-22T13:35:57.712903",
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