ISO standards download ISO 6507-2:2018 pdf download – Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing machines ISO 6507-2:2018 pdf download - Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing machines. 2 Normative references The following documents are referred to in the text in such a way that... 02-19 Download Now