TECHNICAL LIBRARY · ASTM PROCUREMENT REFERENCE
ASTM B276-21(2026) — Cemented Carbide Apparent Porosity
Procurement reference for metallographic determination and reporting of apparent porosity in cemented carbides.
Edition control: ASTM B276-21(2026) is listed as active by ASTM; checked on . This original MNK-G.S.A summary does not reproduce or replace the protected ASTM publication. Confirm the current authorised edition and governing order documents before use.
Scope in Procurement
ASTM B276-21(2026) provides a metallographic route for determining apparent porosity in cemented carbides.
The observed field can include true pores and other features visible on a properly prepared unetched surface, so preparation, image quality and classification context matter.
The method is not itself a product specification. Any permitted porosity level must be stated by the producer, customer or governing specification for the exact grade and application.
| Feature | Apparent porosity and other visible unetched-surface features |
| Material context | Cemented carbides |
| Procurement role | Metallographic inspection and reporting control |
| Scope boundary | Does not create universal acceptance levels for every grade or application |
Where This Standard Fits
- Hardmetal batch qualification
- Porosity evidence for ВК/ТК or other carbide products
- Inspection-plan and laboratory coordination
- Separating a test method from contractual acceptance criteria
Ordering and Document Controls
- Exact ASTM edition and ordered grade
- Batch, specimen source and sampling plan
- Surface preparation and examination conditions
- Observed feature type and documented classification
- Customer or project acceptance criteria
- Photomicrographs, report identity and traceability
Related MNK Technical Pages
Official Publication and Access Policy
Official record: ASTM B276-21(2026) at ASTM International. Obtain authorised content through the publisher or an authorised standards distributor. Protected clauses, tables, figures and acceptance values are not reproduced here.
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Technical Sources & Revision
Source: ASTM International. ASTM B276-21(2026)
Document / edition: ASTM B276-21(2026)
Source used for: The public ASTM International catalogue record supports the document identity, edition and scope summary on this page. It is used for the stated material or product coverage and the named test or inspection method, where applicable. It does not establish product conformity or replace numerical requirements in the full publication.
Technical source review:
Review scope: the public publisher record and this procurement summary, not a clause-by-clause audit of the full standard. For acceptance, use the governing publication, purchase specification and product or test documentation.