ASTM B294-22 PDF
Name in English:
St ASTM B294-22
Name in Russian:
Ст ASTM B294-22
Original standard ASTM B294-22 in PDF full version. Additional info + preview on request
Full title and description
ASTM B294-22 — Standard Test Method for Hardness Testing of Cemented Carbides. Specifies Rockwell hardness testing procedures (HRA scale) for cemented carbides, including indenter selection, test-block management, calibration/traceability, and related test arrangements used to assess hardness as an indicator of wear resistance and metallurgical quality.
Abstract
This standard establishes the procedure for measuring the Rockwell hardness of cemented carbides using the carbide Rockwell HRA scale (diamond indenter, 10 kgf preliminary force, 60 kgf total force) for values at about 80 HRA and above. It defines requirements for tester performance, indenter selection and verification, specimen and test-block preparation, calibration and traceability of primary/secondary/working test blocks, and conformity with the relevant portions of ASTM E18 and other referenced practices.
General information
- Status: Active standard
- Publication date: Approved March 1, 2022 (published March 2022)
- Publisher: ASTM International (American Society for Testing and Materials)
- ICS / categories: 77.040.10 — Mechanical testing of metals
- Edition / version: ASTM B294-22 (current edition)
- Number of pages: 10
Scope
Applies to hardness testing of cemented carbides by Rockwell HRA (diamond indenter, 10 kgf preliminary force, 60 kgf total force) for hardness values roughly 80 HRA and higher. The standard covers tester requirements, indenter testing and selection, specimen support and preparation, test-block types (Primary, Secondary, Working), calibration and traceability procedures, and the relationship to Test Method E18 where indicated.
Key topics and requirements
- Use of the Rockwell HRA scale for cemented carbides (diamond indenter; 10 kgf preliminary, 60 kgf total).
- Requirements for Rockwell hardness testers and adherence to ASTM E18 where applicable.
- Procedures for selection, testing, and verification of diamond indenters.
- Management and traceability of standardized test blocks: Primary, Secondary, and Working.
- Specimen preparation, fixturing, and precautions to minimize test error (vibration, surface finish, support).
- Calibration, record-keeping, and practices to ensure reproducibility and comparability of hardness values.
- Limitations and significance: hardness as an indicator of wear resistance and metallurgical quality but not the sole evaluation method.
Typical use and users
Used by manufacturers and suppliers of cemented-carbide products (tungsten carbide/cobalt and related hardmetals), independent testing laboratories, quality assurance and materials engineering teams, tooling and cutting-tool producers, and procurement/specification authors who require standardized hardness measurement and traceable calibration for acceptance, R&D, and quality control.
Related standards
Key related documents and references commonly used with B294 include ASTM E18 (Test Methods for Rockwell Hardness of Metallic Materials), ASTM E29 (practice for significant digits and test-data reporting), ISO documents for hardmetals and test-block calibration (e.g., ISO hardmetal Rockwell test parts), and laboratory accreditation standards such as ISO/IEC 17025. B294-22 supersedes the previous edition B294-17.
Keywords
ASTM B294-22, cemented carbides, hardmetals, Rockwell HRA, hardness testing, diamond indenter, test blocks, calibration, traceability, tungsten carbide, WC-Co, hardness scale, materials testing
FAQ
Q: What is this standard?
A: ASTM B294-22 is the ASTM standard test method that specifies how to perform Rockwell hardness testing on cemented carbides (hardmetals) using the HRA scale and associated procedures for indenters, test blocks, and calibration.
Q: What does it cover?
A: It covers the test apparatus and procedural details for measuring HRA hardness (diamond indenter, 10 kgf preliminary force, 60 kgf total force), specimen and test-block preparation, indenter verification, calibration/traceability of primary/secondary/working blocks, and guidance on minimizing measurement error. It also references and defers to ASTM E18 where applicable.
Q: Who typically uses it?
A: Manufacturers and suppliers of cemented carbides, independent and in-house materials labs, tooling and wear-component producers, quality engineers, and organizations that require traceable, repeatable hardness data for specification, acceptance, or research.
Q: Is it current or superseded?
A: The current edition is ASTM B294-22 (approved March 1, 2022). It supersedes ASTM B294-17.
Q: Is it part of a series?
A: B294 is part of ASTM Committee B09 work on metal powders and cemented carbides and is published in the ASTM Book of Standards (volume covering metal powders and powder metallurgy materials). It is routinely used alongside other ASTM and ISO hardness and laboratory accreditation standards.
Q: What are the key keywords?
A: Cemented carbides, hardmetals, Rockwell HRA, hardness testing, diamond indenter, test blocks, calibration, traceability, tungsten carbide, WC-Co, ASTM B294-22.