TY - GEN AU - Powell, Louise Ahure AU - Beauchamp, Carlos AU - Machado, Renato AU - Possolo, Antonio C2 - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD DA - 2026-08-05 04:08:00 DO - https://doi.org/10.6028/NIST.SP.260-269 LA - en PB - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD PY - 2026 TI - Certification Report for SRM 2810a, 2811a, and 2812a: Rockwell C Scale Hardness – Low, Medium, and High Ranges UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=962145 ER -