ISO 17639-2022 PDF

Full title and description

ISO 17639:2022 — Destructive tests on welds in metallic materials — Macroscopic and microscopic examination of welds. This international standard gives recommendations for preparation of specimens, test procedures and reporting for macroscopic and microscopic examination of welded joints to reveal geometry, defects and microstructural features of weld metal and heat-affected zones.

Abstract

Provides guidance on specimen orientation and removal, cutting, mounting, grinding, polishing, etching (where applicable), magnifications and methods used for macroscopic (low magnification, with or without etching) and microscopic (optical microscopy at higher magnifications) examination of welded joints. The document outlines the main objectives of each examination type and gives recommendations for documenting and reporting results.

General information

• Status: Published.
• Publication date: 7 February 2022 (ISO edition 2, 2022).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.160.40 — Welded joints and welds.
• Edition / version: Edition 2 (2022).
• Number of pages: 9 (ISO edition PDF length as published by ISO).

Scope

ISO 17639:2022 applies to destructive examinations used to evaluate welded joints in metallic materials. It covers procedures and objectives for macroscopic and microscopic examination, including the recommended specimen orientations (typically transverse sections), preparation steps (cutting, mounting, grinding, polishing), optional etching, and reporting conventions for revealing weld geometry, defects (cracks, lack of fusion, cavities, inclusions) and microstructural features (grain structure, HAZ characteristics, solidification structure).

Key topics and requirements

• Specimen selection and orientation — guidance on transverse and other sectioning to capture weld metal and HAZ.
• Specimen preparation — cutting, mounting, grinding, polishing and surface finish appropriate to macro or micro examination.
• Etching recommendations — when and how to etch, with reference to common etchants and guidance (normative/technical references).
• Macroscopic examination — low-magnification inspection, revealing weld profile, discontinuities and section geometry.
• Microscopic examination — optical microscopy at higher magnifications for microstructure, inclusions, precipitates and fine defects.
• Documentation and reporting — specimen designation, photographic records, measurement conventions and correspondence to material grouping and defect classification.
• Cross-references to related technical reports and standards for etchants, material grouping and defect classification (for example ISO/TR 16060, ISO/TR 15608, ISO 6520-1).

Typical use and users

Used by welding inspectors, metallurgists, destructive-testing laboratories, fabricators, QA/QC engineers, R&D teams and certification bodies for quality control, weld procedure qualification (PQR/WPQR), failure analysis and research. Typical applications include pressure-vessel and pipeline fabrication, structural steelwork, component qualification and forensic metallurgical investigations.

Related standards

Commonly used together with other ISO and EN standards covering weld testing and acceptance, for example ISO 5817 (quality levels for imperfections), ISO 17637 (visual testing), ISO 17640 (ultrasonic testing), ISO 17635 (general NDT rules for welds) and normative/technical references such as ISO/TR 15608 (material grouping), ISO/TR 16060 (etchants) and ISO 6520-1 (classification of geometric imperfections).

Keywords

Destructive testing, welds, macroscopic examination, microscopic examination, specimen preparation, etching, heat-affected zone (HAZ), weld defects, metallography, weld inspection.

FAQ

Q: What is this standard?

A: An ISO standard specifying recommended methods and objectives for macroscopic and microscopic destructive examination of welded joints in metallic materials (ISO 17639:2022).

Q: What does it cover?

A: Procedures for specimen orientation and removal, cutting, mounting, grinding, polishing, optional etching, magnification ranges for macro/micro examination, documentation and reporting of observations to identify weld geometry, defects and microstructure.

Q: Who typically uses it?

A: Welding inspectors, metallurgists, destructive testing laboratories, fabrication and QA engineers, certification bodies and R&D teams performing weld quality assessment, failure analysis or procedure qualification.

Q: Is it current or superseded?

A: Current — ISO 17639:2022 is the second edition and supersedes ISO 17639:2003.

Q: Is it part of a series?

A: It is part of the family of ISO standards produced by ISO/TC 44 for testing and inspection of welds and is typically used alongside related standards for visual, ultrasonic and general NDT of welds (for example ISO 17637, ISO 17640, ISO 17635) and references covering defect classification and etching.

Q: What are the key keywords?

A: Macroscopic examination, microscopic examination, destructive tests, weld inspection, specimen preparation, metallography, HAZ, weld defects.