Overview
ISO/TR 16078:2013 - Cast Irons - Classification and designation of casting imperfections - provides a standardized taxonomy and labelling system for imperfections in castings. Focused primarily on iron castings produced in sand moulds, the Technical Report can also be applied to other casting materials and processes. It defines terms (e.g., imperfection, discontinuity, defect), gives clear descriptions and illustrations of imperfection types, and specifies a compact designation system to improve communication between manufacturers, purchasers and inspectors.
Key Topics
- Scope and applicability: Primarily for iron castings in sand moulds, with examples for other materials and techniques.
- Terms and definitions: Precise definitions to avoid ambiguity in inspection and reporting (imperfection, discontinuity, defect).
- Designation system: A four-position code - one letter for the imperfection category and a three-digit number for group, sub‑group and specific imperfection (e.g., Letter + 3 numbers).
- Classification: Systematic grouping of common casting imperfections with explanations and illustrations where necessary.
- Informative annexes:
- Annex A: Alphabetical index of common names (English, French, German).
- Annex B: Equivalences in additional languages.
- Limitations: The report does not provide root‑cause analysis, corrective actions, or acceptance criteria - consult referenced bibliography for remedies.
Applications
ISO/TR 16078:2013 is a practical tool for:
- Foundries and production teams - consistent documentation of observed imperfections during casting and cleaning.
- Quality control and inspection - standardized reporting and traceability of discontinuities and deviations from intended geometry or material properties.
- Procurement and contracts - unambiguous specification and communication of nonconformities between purchasers and manufacturers.
- Design and engineering - clearer feedback on manufacturability issues and geometry-related deviations.
- Training and reference - visual and lexical reference for metallurgists, NDT technicians and inspectors.
Using the standard helps reduce misunderstandings, speeds dispute resolution, and aligns national and international terminology (it is consistent with the World Foundrymen’s Organisation classification and several national foundry bodies).
Related standards and references
- Prepared by ISO/TC 25 (Cast irons and pig irons); consistent with WFO classification.
- Illustrative material referenced from the “International Atlas of Casting Defects” and other foundry publications (see the report bibliography).
- For root causes, corrective measures or acceptance levels, consult process‑specific standards and technical literature listed in the TR’s bibliography.
Keywords: ISO/TR 16078:2013, cast irons, casting imperfections, casting defects classification, foundry standards, sand moulds, casting inspection, designation system.