Indenter
Calibration details & Traceability:
The above Rockwell indenter is performance verified against reference indenter using a standardising machine at FMCTL. The standardising machine is directy
calibrated as per the requirements of ISO 6508-3:2015 and ASTM E18-16 annex A2.
The standardising machine is calibrated using devices traceable to NPL-India, NPL- UK, IMGC, NIST or PTB either directly or through NABL, UKAS, NVALP or DAkkS accredited laboratories.
Calibration Method:
FMCTL/SOP/Rockwell based on ISO 6508-2 and IS 1586 (Part 2) standards.
| Measurement Results | ||||
|---|---|---|---|---|
| Test Point | Hardness Level | Deviation from Reference Indenter | Admissible Deviation | Expanded Uncertainty |
| Test Point 1 | HRC 25 | +0.36 HRC | ±0.8 HRC | ±0.73 HRC |
| Test Point 2 | HRC 63 | -0.21 HRC | ±0.8 HRC | ±0.34 HRC |
| Test Point 3 | HR30N 64 | +0.04 HR30N | ±0.8 HR30N | ±0.56 HR30N |
| Test Point 4 | HR15N 91 | +0.07 HR15N | ±0.8 HR15N | ±0.44 HR15N |
Conformance Statement: This indenter fulfils the requirements of performance verification in accordance with the standards: ISO 6508-2 & IS 1586 (Part 2).