INTERNATIONAL STANDARD ISO 14577-3 Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 3: Calibration of reference blocks ISO 14577 consists of the following parts, under the general title Metallic materials —— Instrumented indentation test for hardness and materials parameters ISO 14577-1:2015, Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 1: Test method ISO 14577-2:2015, Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 2: Verification and calibration of testing machines ISO 14577-3:2015, Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 3: Calibration of reference blocks ISO 14577-4:2016, Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 4:Test method for metallic and non-metallic coatings Contents Foreword Introduction 1 Scope 2 Normative references 3 Manufacture of reference blocks 4 Calibration machine 5 Calibration procedure 6 Number of indentations 7 Uniformity of hardness 8 Marking 9 Validity Bibliography 1 Scope This part of ISO 14577 specifies a method for the calibration of reference blocks to use for the indirect verification of testing machines for the instrumented indentation test as specified in ISO 14577-2:2015. NOTE The reference blocks can be calibrated in accordance with the field of application of the testing machine or with the materials parameters which are being determined. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 376, Metallic materials — Calibration of force-proving instruments used for the verification of uniaxial testing machines ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters ISO 14577-1:2015, Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 1: Test method ISO 14577-2:2015, Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 2: Verification and calibration of testing machines