ISO 23700:2021

INTERNATIONAL ISO
STANDARD 23700
First edition
2021-03
Wrought magnesium and magnesium
alloys — Rolled plates and sheets
Reference number
©
ISO 2021
© ISO 2021
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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 Orders or tenders . 1
5 Requirements . 2
5.1 Designation . 2
5.2 Production and manufacturing processes . 3
5.3 Quality control . 3
5.4 Chemical composition . 3
5.5 Dimensional tolerances . 5
5.6 Mechanical properties . 5
5.7 Surface finish . 9
6 Test procedure . 9
6.1 Sampling . 9
6.1.1 Sampling for chemical analysis . 9
6.1.2 Sampling for mechanical testing . 9
6.2 Test methods .10
6.2.1 Chemical composition .10
6.2.2 Tensile test .10
6.2.3 Erichsen test .10
6.2.4 Measurement of dimensions .10
6.2.5 Surface finish .10
6.3 Retests .11
6.3.1 Mechanical properties .11
6.3.2 Other properties .11
7 Inspection documents .11
7.1 General .11
7.2 Certificat e of conformity .11
7.3 Test report .11
7.4 Specific test report .11
8 Marking .12
9 Packing.12
10 Transportation and storage .12
11 Arbitration tests .12
Foreword
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electrotechnical standardization.
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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).
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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.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

Introduction
This document classifies the commercially available magnesium and magnesium alloy rolled plates and
sheets into a number of grades suitable for the application to which they might be put.
INTERNATIONAL STANDARD ISO 23700:2021(E)
Wrought magnesium and magnesium alloys — Rolled
plates and sheets
1 Scope
This document specifies chemical composition, mechanical properties, dimension and shape tolerance,
heat treatment and the technical conditions for inspection and delivery of rolled magnesium and
magnesium alloy plates and sheets.
It is applicable to rolled magnesium and magnesium alloy plates and sheets.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3116, Magnesium and magnesium alloys — Wrought magnesium and magnesium alloys
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
sheet
product that is rectangular in cross-section with nominal thickness less than 6 mm, but not less than
0,20 mm, and with slit, sheared or sawed edges
3.2
plate
product that is rectangular in cross-section and with thickness not less than 6 mm with sheared or
sawn edges
4 Orders or tenders
The order or tender shall define the product required and shall contain the following details:
a) the type and form of the product:
1) designation of the magnesium or magnesium alloy;
2) form of the product (sheet, plate);
b) the metallurgical temper (degree of hardness or heat treatment condition) of the material for
delivery and, if different, the metallurgical temper for use;
c) the number of this document, i.e. ISO 23700, the specification number, or, where none exists, the
properties agreed between the supplier and the purchaser;
d) the dimensions and shape of the product (thickness, width, length, diameter of the coil);
e) the tolerances of the dimensions and form, with reference to the appropriate clause or subclause of
this document;
f) the quantity;
g) any requirements for certificates of conformity, test and/or analysis;
h) any special requirements agreed between the supplier and the purchaser (e.g. drawings).
5 Requirements
5.1 Designation
The following symbols shall be used for temper designation:
— O: annealed;
— H112: strain hardened from working at elevated temperature or from a limited amount of cold
work, and for which there are mechanical properties limits;
— H × 4: half hardened (strain hardened to give an ultimate tensile strength approximately midway
between that of annealed and H × 8 temper);
— H × 2: quarter hardened (strain hardened to give an ultimate tensile strength approximately midway
between that of annealed and H × 4 temper);
— T5: cooled from an elevated temperature shaping process and then artificially aged.
The alloy designation and temper should be as given in Table 1.
Table 1 — Alloy designation and temper
Alloy designation Alloy symbol Temper Thickness
mm
MAM61 ISO-MgAl6Mn1 H112 1 ≤ t ≤ 5
MAM91 ISO-MgAl9Mn1 H112 1 ≤ t ≤ 5
MAT11 ISO-MgAl1Sn1 O 0.5 ≤ t ≤ 2
MAT61 ISO-MgAl6Sn1 O 0.5 ≤ t ≤ 2
MAZ31a ISO-MgAl3Zn1(A) O, H × 4, H × 2 0.5 ≤ t ≤ 25
MAZ31b ISO-MgAl3Zn1(B) O, H112 0.4 ≤ t ≤ 70
MAZ40 ISO-MgAl4Zn H112 40 ≤ t ≤ 70
MAZ41 ISO-MgAl4Zn1 H112 10 ≤ t ≤ 70
MAZX310 ISO-MgAl3Zn1Ca O 0,5 ≤ t ≤ 1,5
MAZE310 ISO-MgAl3Zn1RE O 0,5 ≤ t ≤ 1,5
MVWE751 ISO-MgGd7Y5RE1 T5 10 ≤ t ≤ 20
MVW76 ISO-MgGd7Y6 T5 12 ≤ t ≤ 70
MLAZ931 ISO-MgLi9Al3Zn1 O, H112 0,5 ≤ t ≤ 60
MME20 ISO-MgMn2RE H112 10 ≤ t ≤ 70
MWE43c ISO-MgY4RE3Zr(C) T5 12 ≤ t ≤ 70
MWEK711 ISO-MgY7RE1Zr1 T5 10 ≤ t ≤ 20
2 © ISO 2021 – All rights reserved

Table 1 (continued)
Alloy designation Alloy symbol Temper Thickness
mm
MZE10 ISO-MgZn1RE O 0,5 ≤ t ≤ 1,5
MZE20 ISO-MgZn2RE O 0,5 ≤ t ≤ 1,5
MZM21 ISO-MgZn2Mn1 O, H × 4 6 ≤ t ≤ 25
MZK60 ISO-MgZn6Zr0 H112 20 ≤ t ≤ 60
MZK61 ISO-MgZn6Zr1 T5, H112 10 ≤ t ≤ 70
5.2 Production and manufacturing processes
Unless otherwise specified in the order, the production and manufacturing processes shall be left to
the discretion of the producer. Unless it is explicitly stated otherwise in the order, no obligation shall be
placed on the producer to use the same processes for subsequent and similar orders.
5.3 Quality control
The supplier shall be responsible for the performances of all inspection and tests required by the
relevant International Standard or specification, prior to shipment of the product.
If the purchaser wishes to inspect the product at the supplier’s works, he or she shall notify the supplier
at the time of placing the order.
5.4 Chemical composition
The chemical composition shall conform to the requirements for the appropriate material given in
Table 2 or to the requirements specified in ISO 3116.
If the purchaser requires content limits for elements not specified in Table 2 or in ISO 3116, these limits
shall be stated in the order document.
4 © ISO 2021 – All rights reserved
Table 2 — Chemical composition of rolled magnesium alloy plates and sheets
Alloy Material designation Composition
group % (mass fraction)
Oth- Oth-
Symbol Designation Element Mg Al Zn Mn Gd RE Li Zr Y Ca Be Si Fe Cu Ni ers ers
each total
MgAlMn ISO- min. Rem. 5,0 — 0,50 — — — — — — — — — — — — —
MAM61
MgAl6Mn1
max. — 7,0 — 1,50 — — — — — — — — — — — 0,01 0,30
ISO- min. Rem. 8,0 — 0,50 — — — — — — — — — — — — —
MAM91
MgAl9Mn1
max. — 10,0 — 1,50 — — — — — — — — — — — 0,01 0,30
MgAlZn min. Rem. 3,0 0,20 0,15 — — — — — — — — — — — — —
...