Overview
ISO 793:1973 defines the standardized procedure for determining iron content in aluminium and aluminium alloys using the orthophenanthroline photometric method. This internationally recognized standard by ISO specifically targets iron concentrations between 0.05% and 2.5% by mass. The method is crucial for quality control and material certification in aluminium production and processing. However, it excludes unalloyed aluminium, aluminium-silicon alloys, and alloys containing significant amounts of copper, zinc, or nickel unless specific modifications described in annexes are applied.
This method provides a reliable, accurate, and reproducible approach for chemical analysis of iron levels, which impacts the mechanical properties, corrosion resistance, and overall performance of aluminium materials.
Key Topics
Applications
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Quality Control in Aluminium Manufacturing
- Ensures the iron content remains within specification for various aluminium alloys.
- Helps maintain mechanical strength and corrosion resistance by controlling impurity levels.
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Material Certification and Compliance
- Provides standardized test results accepted worldwide for aluminium and alloy certification.
- Supports compliance with international quality and safety standards.
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Research and Development
- Enables researchers to accurately measure iron levels when designing new aluminium alloys.
- Facilitates testing of alloy adjustments for performance improvements.
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Metallurgical Laboratories
- Standardized, reproducible photometric method widely used in testing labs for aluminium production and recycling facilities.
- Reduces variability and improves reliability of analytical results.
Related Standards
- ISO 1387 - Sampling of metal alloys for chemical analysis.
- ISO 17025 - General requirements for the competence of testing and calibration laboratories.
- ISO 80000 series - Related to quantities and units used in chemical compositions.
- ISO/TR 16220 - Guidelines for chemical analysis methods of aluminium and aluminium alloys.
Keywords: ISO 793, iron determination, aluminium alloys, orthophenanthroline photometric method, chemical analysis, iron content measurement, aluminium quality control, alloy testing, standard methods, photometry, chemical reagents, hydrochloric acid digestion, aluminium certification.