ASTM E3246-22
Standard Test Methods for Differential Indentation Depth Hardness of Metallic Materials

Standard No.

ASTM E3246-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E3246-22

Scope

1.1 This test method covers the determination of the Differential Indentation Depth hardness of metallic materials by the Differential Indentation Depth hardness principle. This standard provides the requirements for Differential Indentation Depth hardness testing machines and the procedures for performing Differential Indentation Depth hardness tests. 1.2 This standard includes additional requirements in annexes: Verification of Differential Indentation Depth Hardness Testing Machines Annex A1 Guidelines for Determining the Minimum Thickness of a Test Piece Annex A2 1.3 This standard includes non-mandatory information in appendixes which relates to the Differential Indentation Depth hardness test. List of ASTM Standards Giving Hardness Numbers Corresponding to Tensile Strength Appendix X1 Examples of Procedures for Determining Differential Indentation Depth Hardness Uncertainty Appendix X2 Examples of Indenters Used in Differential Indentation Depth Machines Appendix X3 1.4 Units—This standard specifies the units of force and length in the International System of Units (SI); that is, force in Newtons (N) and length in micrometers (µm). However, because of continued common usage, values are provided in other units of measure for information. 1.5 The test principles, testing procedures, and verification procedures are essentially identical for all the Differential Indentation Depth hardness testing instruments. The testing instruments may use different test forces and indenter shapes. The type and size of the indenters are matched to the design of the instrument by the manufacturer. Accordingly, the indenters, probes and other instrument components are generally not interchangeable among manufacturers. 1.6 The hardness number reported by these instruments are based on direct correlations to existing hardness scales as determined by each manufacturer for each instrument and hardness scale. Unless otherwise noted on the instrument or in the operating manual for the instrument, the hardness numbers reported by the instrument are only applicable to non-austenitic steels. See 5.6.1 for additional information. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM E3246-22 Referenced Document

• ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• ASTM E10 Standard Test Method for Brinell Hardness of Metallic Materials*， 2023-08-03 Update
• ASTM E110 Standard Test Method for Indentation Hardness of Metallic Materials by Portable Hardness Testers
• ASTM E140 Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope Hardness
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E18 Standard Test Methods for Rockwell Hardness of Metallic Materials*， 2022-05-01 Update
• ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ASTM E384 Standard Test Method for Microindentation Hardness of Materials
• ASTM E6 Standard Terminology Relating to Methods of Mechanical Testing
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E92 Standard Test Method for Vickers Hardness of Metallic Materials
• ISO 18265 Metallic materials.Conversion of hardness values
• ISO/IEC 17011 Conformity assessment — Requirements for accreditation bodies accrediting conformity assessment bodies*， 2024-04-22 Update
• ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories [Standard in French]
• SAE J417 Hardness Tests and Hardness Number Conversions

ASTM E3246-22 history

• 2022 ASTM E3246-22 Standard Test Methods for Differential Indentation Depth Hardness of Metallic Materials
• 2021 ASTM E3246-21 Standard Test Methods for Differential Indentation Depth Hardness of Metallic Materials