Overview
ISO/TR 9769:2018 - Steel and iron: Review of available methods of analysis is a Technical Report from ISO/TC 17 that compiles and summarizes published International Standards for determining the chemical composition of steel and iron. The document lists mono‑elemental and multi‑elemental analytical methods, states their range of application and principles, and provides precision information (graphically in Annex A) and a summary listing of referenced standards (in Annex B). This fourth edition updates earlier editions to reflect current standardized methods for elemental analysis in steel and iron.
Key topics
- Scope and purpose: Guidelines for determining chemical composition of steel and iron by reference to ISO standards.
- Mono‑elemental methods: Element‑by‑element review (examples in the report include aluminium, antimony, arsenic, boron, calcium, carbon, chromium, nickel, sulfur, silicon, etc.). For each element the report gives:
- applicable ISO document reference,
- range of application (mass fraction limits where provided),
- principle of the method (e.g., flame atomic absorption spectrometry, electrothermal AAS, spectrophotometry, infrared absorption after combustion).
- Multi‑elemental methods: Overview of combined analyses for groups of elements using techniques suitable for simultaneous determination.
- Precision and traceability: Annex A provides graphical representations of precision data; Annex B summarizes referenced International Standards.
- Terminology: Definitions relevant to routine methods and calibration practices.
Practical applications
ISO/TR 9769:2018 is a practical reference for professionals who need to select or compare standardized analytical methods for steel and iron composition:
- Metallurgical and steel production laboratories - choose appropriate standardized methods for process control and product certification.
- Independent testing and inspection labs - verify method suitability and trace precision/limits for requested analyses.
- Quality assurance / QC managers - define routine methods, sampling and calibration strategies in contracts and internal procedures.
- Standards developers and regulators - reference for harmonizing test method requirements in specifications and procurement.
- Materials engineers and R&D teams - select methods for alloy development and failure analysis.
Related standards & resources
- Annex B of ISO/TR 9769 lists the specific ISO standards for each element (e.g., ISO 9658 for aluminium by flame AAS; ISO 10698 for antimony by electrothermal AAS; ISO 9556 for carbon by IR after combustion).
- Precision data and method comparison are provided in Annex A to support method selection and performance expectation.
Keywords: ISO/TR 9769:2018, steel analysis, chemical composition, methods of analysis, atomic absorption, spectrophotometric, infrared absorption, multi‑elemental methods, precision data.
