Overview
ISO 629:2026 specifies an internationally recognized spectrophotometric method for the determination of manganese content in steel and cast iron. Developed by the International Organization for Standardization (ISO), this standard is applicable to manganese mass fractions ranging from 0.001% to 4.0%. The methodology is designed to provide precise, reliable results for quality control and chemical analysis in metallurgy and manufacturing sectors.
Key Topics
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Scope of Applicability
- Suitable for both steel and cast iron samples.
- Covers a broad range of manganese concentrations, supporting diverse industrial needs.
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Spectrophotometric Method
- Involves dissolving the sample in a mixture of acids and forming a colored compound for photometric analysis.
- Measurement is conducted at a wavelength of approximately 545 nm for optimal sensitivity.
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Sample Preparation and Calibration
- Detailed steps for preparing test portions based on presumed manganese content.
- Blank tests and the establishment of calibration curves ensure accurate quantification.
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Lab Equipment and Reagents
- Use of class A volumetric glassware as per ISO standards.
- Highly pure reagents and water, following ISO 3696 specifications, are critical for valid results.
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Reporting Requirements
- Clear instructions for documenting analysis results, methods, and any deviations, supporting traceability and compliance.
Applications
Related Standards
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ISO 648: Laboratory glassware - Single-volume pipettes
- Specifies requirements for pipettes used in sample preparation.
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ISO 1042: Laboratory glassware - One-mark volumetric flasks
- Describes standards for volumetric flasks essential for precise solution preparation.
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ISO 3696: Water for analytical laboratory use - Specification and test methods
- Outlines criteria for the purity of water used in analytical testing like spectrophotometry.
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ISO 14284: Steel and iron - Sampling and preparation of samples for the determination of chemical composition
- Provides guidelines on representative sampling and preparation to ensure the integrity of chemical analysis.
By implementing ISO 629:2026, laboratories and manufacturing operations benefit from a standardized, reliable approach to determining manganese levels in steel and cast iron. This ensures product quality, supports regulatory and customer requirements, and fosters confidence in material specifications across international markets. The standard's alignment with other ISO laboratory and testing guidelines facilitates seamless integration into existing quality management systems.
Open preview (PDF)Steel and cast iron — Determination of manganese content — Spectrophotometric method