ISO 8287:2021

Magnesium and magnesium alloys - Unalloyed magnesium - Chemical composition

This document specifies the chemical composition of cast unalloyed magnesium. It specifies classification, designation, testing rules, marking, packing, transportation, storage, and information subject to agreement between the manufacturer and the purchaser. This document applies to cast unalloyed magnesium produced by the silicon-thermo process or molten salt electrolysis process.

Magnésium et alliages de magnésium — Magnésium non allié — Composition chimique

General Information

• Status: Published
• Publication Date: 08-Jun-2021
• ICS: 77.120.20 - Magnesium and magnesium alloys
• Technical Committee: ISO/TC 79/SC 5 - Magnesium and alloys of cast or wrought magnesium
• Drafting Committee: ISO/TC 79/SC 5 - Magnesium and alloys of cast or wrought magnesium
• Current Stage: 6060 - International Standard published
• Start Date: 09-Jun-2021
• Due Date: 24-Nov-2021
• Completion Date: 09-Jun-2021

Relations

• Revises: ISO 8287:2011 - Magnesium and magnesium alloys - Unalloyed magnesium - Chemical composition
• Effective Date: 15-Dec-2017

Overview

ISO 8287:2021 is an international standard published by the International Organization for Standardization (ISO) that specifies requirements for unalloyed cast magnesium. This fourth edition, released in June 2021, provides clear guidelines on the chemical composition, classification, designation, testing, marking, packing, transportation, storage, and associated quality documentation for unalloyed magnesium produced by the silicon-thermo or molten salt electrolysis processes. The standard helps ensure consistent quality and purity for commercial applications by specifying detailed chemical composition limits and procedures agreed upon between manufacturers and purchasers.

Key Topics

• Scope and Application: Focused on cast unalloyed magnesium with a minimum purity of 99% mass fraction, used in a variety of industrial contexts.
• Chemical Composition: Defines multiple grades of magnesium with precise maximum impurity limits for elements such as aluminum, manganese, iron, copper, nickel, lead, tin, sodium, calcium, and zinc. New grades-ISO Mg99.95C, Mg99.995A, Mg99.995B, and Mg99.995C-offer enhanced purity options.
• Manufacture and Sampling: Production methods are unspecified but sampling for chemical analysis is standardized with samples taken at the time of melt pouring.
• Testing and Acceptance: Criteria for inspection, batch definition, and testing are outlined. Testing methods require manufacturer-purchaser agreement to verify conformity to composition requirements.
• Marking and Packing: Detailed requirements for indelible marking of ingots and bundles ensure traceability. Packaging protocols protect product integrity during transportation and storage.
• Documentation and Quality Assurance: Includes guidelines for declaration of conformity, quality certificates, and complaint handling to address product defects impacting performance.

Applications

ISO 8287:2021 serves critical roles in industries requiring high-purity magnesium castings such as:

• Automotive and Aerospace: Lightweight, high-purity magnesium parts enhance fuel efficiency and structural performance.
• Electronics and Electrical Engineering: Use in components where magnesium’s electrical and thermal properties are required.
• Pharmaceutical and Food Processing: Compliance with limits on hazardous elements like cadmium, mercury, arsenic, and chromium ensures suitability.
• Metallurgy and Foundry: Standardizes material quality for further alloying or manufacturing processes.
• Research and Development: Provides a reliable baseline for studies involving unalloyed magnesium materials.

Related Standards

• EN 12421:2017: The European counterpart, which ISO 8287 aligns with, offers classifications of unalloyed magnesium grades identical to those specified in this standard.
• ISO 80000-1:2009: Governs quantities, units, and rounding rules applied to chemical composition reporting.
• Other ISO/TC 79 Documents: Cover various light metals and alloys offering complementary standards on manufacturing, testing, and quality requirements for magnesium alloys.

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Keywords: ISO 8287:2021, unalloyed magnesium, magnesium chemical composition, cast magnesium, magnesium purity standards, magnesium alloy classification, magnesium testing, magnesium marking and packing, magnesium transportation and storage, magnesium quality certificate, magnesium industry standard.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 8287
Fourth edition
2021-06
Magnesium and magnesium alloys —
Unalloyed magnesium — Chemical
composition
Magnésium et alliages de magnésium — Magnésium non allié —
Composition chimique
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
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Published in Switzerland
ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Information to be supplied by the purchaser. 1
5 Designation . 2
6 Manufacture . 2
7 Chemical composition . 2
8 General condition of the product . 3
9 Testing conditions . 3
9.1 Inspection and acceptance. 3
9.2 Batches . 3
10 Testing . 3
11 Rounding of results . 3
12 Declaration of conformity and inspection documents . 3
13 Marking . 3
14 Packing. 4
15 Transportation . 4
16 Storage . 4
17 Quality certificate . 4
18 Complaints . 4
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 79, Light metals and their alloys,
Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium.
This fourth edition cancels and replaces the third edition (ISO 8287:2011), which has been technically
revised.
The main changes compared with the previous edition are as follows:
a) in the Introduction and Clause 2, EN 12421:1998 has been replaced by EN 12421:2017;
b) four new grades of cast unalloyed magnesium have been added in Table 1, namely ISO Mg99,95C,
ISO Mg99,995A, ISO Mg99,995B and ISO Mg99,995C.
iv © ISO 2021 – All rights reserved

Introduction
This document classifies commercially available cast unalloyed magnesium into a number of grades
suitable for the applications for which they might be used. The grades listed in this document are
identical to those in EN 12421:2017.
INTERNATIONAL STANDARD ISO 8287:2021(E)
Magnesium and magnesium alloys — Unalloyed
magnesium — C
...