ISO 797-1973 PDF

Full title and description

ISO 797:1973 — Aluminium and aluminium alloys — Determination of silicon — Gravimetric method. Specifies a gravimetric analytical procedure for determining silicon content in aluminium and its alloys, primarily intended for silicon contents ≥ 0.30 %. The method includes notes on modifications required for certain alloying elements (see Annex A and Annex B).

Abstract

The standard describes a gravimetric method for the determination of silicon in aluminium and aluminium alloys. It is applicable to silicon content greater than or equal to 0.30 % and indicates that the procedure must be modified for certain special cases (alloys containing significant silicon and magnesium; alloys containing tin or antimony), with details in annexes.

General information

• Status: Published / Active (listed as published and available from ISO catalogues and standards resellers).
• Publication date: 1 November 1973 (Edition 1, 1973).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.120.10 — Aluminium and aluminium alloys.
• Edition / version: Edition 1 (1973).
• Number of pages: 5 pages (official ISO listing).

Scope

This International Standard specifies a gravimetric method for the determination of silicon in aluminium and aluminium alloys. It applies to silicon contents ≥ 0.30 % and notes that the method requires modification for certain alloy compositions (for example, alloys with silicon plus magnesium, and alloys containing tin or antimony), with guidance provided in the annexes. The procedure is intended for laboratory chemical analysis and quality control of aluminium materials.

Key topics and requirements

• Gravimetric analytical technique for silicon determination in aluminium matrices.
• Applicability threshold: designed for silicon content ≥ 0.30 %.
• Modifications and special-case handling described in Annex A and Annex B for certain alloying elements (Si–Mg interactions; Sn and Sb interferences).
• Designed for use in routine laboratory quality control and material verification in the aluminium industry.
• No extensive normative reference list included in the main text (method is largely self-contained).

Typical use and users

Analytical and quality-control laboratories in the aluminium and metallurgical industries, product inspection and certification bodies, research laboratories working with aluminium alloys, and standards committees comparing or harmonizing chemical analysis methods. It is used where a gravimetric determination of silicon (rather than instrumental techniques) is required or preferred.

Related standards

Other ISO and national standards covering chemical analysis of aluminium and alloys and companion methods (for example, later or related ISO chemical analysis methods such as ISO 5194 and neighboring ISO documents addressing aluminium testing). Users often consult relevant ASTM methods and national standards for alternative or complementary silicon analysis procedures.

Keywords

ISO 797:1973; aluminium; aluminium alloys; silicon determination; silicon analysis; gravimetric method; chemical analysis; Si content ≥ 0.30 %; metallurgical testing; quality control.

FAQ

Q: What is this standard?

A: ISO 797:1973 is an International Standard that specifies a gravimetric method for determining silicon in aluminium and aluminium alloys, first published on 1 November 1973.

Q: What does it cover?

A: It covers the laboratory gravimetric procedure for measuring silicon when the silicon content is 0.30 % or higher, including notes on special-case modifications for alloys with interfering elements (see annexes).

Q: Who typically uses it?

A: Metallurgical and analytical laboratories, aluminium producers and processors, inspection and certification bodies, and researchers working with aluminium alloys who require or prefer a gravimetric silicon determination method.

Q: Is it current or superseded?

A: The standard is listed as ISO 797:1973 (Edition 1) and is published in ISO catalogues and by standards resellers. Users should check the ISO catalogue or their national standards body to confirm whether a more recent ISO method or a national/industry alternative has superseded or supplements it for their specific application.

Q: Is it part of a series?

A: It is one of several ISO publications addressing testing and chemical analysis of light metals and their alloys (ISO/TC 79 subject area). While not formally a numbered series, related ISO documents cover other analytical methods for aluminium and alloys.

Q: What are the key keywords?

A: Silicon, silicon determination, gravimetric method, aluminium, aluminium alloys, chemical analysis, ISO 797:1973.