ISO 3116:2019

INTERNATIONAL ISO
STANDARD 3116
Fifth edition
2019-05
Magnesium and magnesium alloys —
Wrought magnesium and magnesium
alloys
Magnésium et alliages de magnésium — Magnésium et alliages de
magnésium corroyés
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Designation . 1
4.1 Material . 1
4.2 Temper designation . 2
4.3 Designations of product form . 3
4.4 Designation for ordering . 3
5 Requirements . 3
5.1 Chemical composition . 3
5.2 Mechanical properties . 3
5.3 Frequency of testing . 3
6 Sampling . 3
7 Test pieces . 3
8 Test methods . 4
8.1 Chemical composition . 4
8.2 Tensile test . 4
9 Retests . 4
10 Rounding of results . 4
Annex A (informative) List of national designations corresponding to the ISO designation.24
Annex B (informative) Physical properties of wrought magnesium alloys .26
Annex C (informative) Heat-treatment schedules for wrought magnesium alloys .28
Bibliography .30
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
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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.
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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 fifth edition cancels and replaces the fourth edition (ISO 3116:2007), which has been technically
revised to include wrought magnesium alloys that have been developed in the past few years.
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 2019 – All rights reserved

Introduction
This document classifies the commercially available magnesium alloys into a number of grades suitable
for the application to which they might be put.
Some of the alloys referenced in this document can be the subject of a patent or of patent applications and
their listing herein is not to be construed in any way as the granting of a licence under such patent rights.
INTERNATIONAL STANDARD ISO 3116:2019(E)
Magnesium and magnesium alloys — Wrought magnesium
and magnesium alloys
1 Scope
This document specifies the chemical composition and mechanical properties of magnesium and
magnesium alloys for wrought products in the form of bars and solid sections, tubes and hollow
sections, forgings, and plate and sheet.
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 80000-1:2009, Quantities and units — Part 1: General
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
EN 515, Aluminium and aluminium alloys — Wrought products — Temper designations
3 Terms and definitions
No terms and definitions are listed in this document.
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/
4 Designation
4.1 Material
The material shall be designated by symbols as given in Tables 1 to 47.
The designation for alloys shall consist of a prefix character “M”, which represents magnesium, and not
more than three capital letters representing the alloying elements specified in the greatest amount,
arranged in order of decreasing percentages, or in alphabetical order if of equal percentages, followed
by the respective percentages rounded off to whole numbers and a serial letter in lower case.
The letters used to represent the alloying elements shall be those in Table 1. The third letter is used when
the third largest amount of element is above or equal to 1 wt.%. If the third and fourth largest amount
of elements are above or equal to 1, the higher amount of elements is taken; if of equal percentage, the
third letter is decided by the producer who developed the alloy.
Table 1 — Letters representing alloying elements
Letters Element Name of element Letters Element Name of element
A Al Aluminium N Ni Nickel
B Bi Bismuth P Pb Lead
C Cu Copper Q Ag Silver
D Cd Cadmium R Cr Chromium
E RE Rare Earth S Si Silicon
F Fe Iron T Sn Tin
H Th Thorium V Gd Gadolinium
J Sr Strontium W Y Yttrium
K Zr Zirconium X Ca Calcium
L Li Lithium Y Sb Antimony
M Mn Manganese Z Zn Zinc
In rounding percentages, the nearest whole number shall be used. If two choices are possible, for
example when the decimal is followed by a 5 only or a 5 followed only by zeros, the nearest even whole
number shall be used. When a range is specified for the alloying element, the rounded mean shall be
used in the designation. When only a minimum percentage is specified for the alloying element, the
rounded minimum percentage shall be used in the designation. For example:
— an aluminium content of 1,2 wt.% is written as A1;
— an aluminium content of 1,5 wt.% is written as A2;
— an aluminium content of 2,5 wt.% to 3,6 wt.% is written as A3;
— an aluminium content of 2,5 wt.% is written as A2.
The serial letter is defined as “a” or “b” when the two compositions have only minor difference.
For example, ISO-MgAl3Zn1(A) is designated as MAZ31a and ISO-MgAl9Ca1Zn1 is designated as
MAXZ911.
A list of national designations corresponding to this document is given in Annex A. A table of physical
properties of the listed alloys is given in Annex B.
4.2 Temper designation
The following symbols shall be used for temper designation:
— O: annealed;
— F: as fabricated;
— H × 8: fully hardened (stain hardened to give maximum ultimate tensile strength);
— H × 4: half hardened (stain hardened to give an ultimate tensile strength approximately midway
between that of annealed and H × 8 temper);
— H × 2: quarter hardened (stain hardened to give an ultimate tensile strength approximately midway
between that of annealed and H × 4 temper);
— H112: Strain hardened from working at elevated temperature or from a limited amount of cold
work, and for which there are mechanical properties limits.
— T5: cooled from an elevated temperature shaping process and then artificially aged;
— T6: solution heat treated and then artificially aged.
2 © ISO 2019 – All rights reserved

The temper designations shall be in accordance with EN 515.
Details of heat treatments are given in Annex C.
4.3 Designations of product form
The following symbols shall be used for product form:
— B: bars and solid sections;
— T: tubes and hollow sections;
— F: forgings;
— P: plate and sheet.
4.4 Designation for ordering
EXAMPLE
An order for magnesium bars, conforming to this document, of magnesium alloy MAZ31a, delivered in the as-
fabricated condition (F) is as follows:
ISO 3116 - ISO-MgAl3Zn1 (A) (or MAZ31a) - F - B
Tonnage and dimensions shall be specified in addition.
5 Requirements
5.1 Chemical composition
The chemical composition of wrought magnesium alloys, taken as cast analysis at the time the material
is cast, shall conform to the requirements for the appropriate material given in Table 2.
5.2 Mechanical properties
The minimum values of the mechanical properties of wrought products in magnesium alloys in the
defined temper conditions shall be as given in Tables 3 to 48.
5.3 Frequency of testing
The frequency of testing shall be subject to an agreement between the manufacturer and the purchaser.
6 Sampling
Conditions for sampling, formation of batches and frequency of verification shall be subject to an
agreement between the manufacturer and the purchaser.
7 Test pieces
Test pieces shall be taken in the longitudinal direction. For rolled flat products of thickness > 0,6 mm,
test pieces may be taken in the long transverse direction.
8 Test methods
8.1 Chemical composition
The determination of the alloying elements given in Table 2 shall be performed in accordance with the
relevant International Standards, or other standards as agreed between the supplier and the customer.
8.2 Tensile test
Tensile tests shall be carried out in accordance with ISO 6892-1.
9 Retests
Conditions for retests shall be subject to an agreement between the manufacturer and the purchaser.
10 Rounding of results
The number representing the result for any value specified in this document shall be expressed to
the same number of decimal places as the corresponding number in this document. The rounding of
numbers shall meet the requirements of ISO 80000-1:2009, B.3, rule A or B. The choice shall be left to
the discretion of the manufacturer, unless the use of one of the rules is agreed by the time of acceptance
of the order.
4 © ISO 2019 – All rights reserved

Table 2 — Chemical composition of wrought magnesium and magnesium alloys
Composition
Material designation
% (mass fraction)
Prod-
Alloy
uct
Oth- Oth-
group
Designa- Ele-
form
Symbol Number Mg Al Zn Mn Gd RE Li Zr Y Ca Si Fe Cu Ni ers ers
tion ment
each total
min.
0,00 0,00
Mg ISO-Mg99.99 ISO-WD11000 MG9999 B 99,99 0,002 0,003 0,002 — — — — — — — 0,002 0,002 0,002 0,01
03 03
max.
a
min. Rem. 7,5 0,35 0,15 — 0,01 — — — 0,001 0,02 — — — — — —
MgAlAg ISO-MgAl8Ag ISO-WD25110 MAQ80 F,P
0,8
max. — 8,5 0,55 0,35 — 0,10 — — — 0,02 0,05 0,02 0,02 0,001 0,01 0,30
Ag
min. Rem. 4,5 — 0,15 — — — — — 0,7 — — — — — — —
ISO-MgAl5Ca1 ISO-WD25120 MAX51 B,T
max. — 5,4 0,30 0,40 — — — — — 1,5 — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 5,5 — 0,15 — — — — — 0,7 — — — — — — —
MgAlCa ISO-MgAl6Ca1 ISO-WD25130 MAX61 B,T,P
max. — 6,5 0,30 0,40 — — — — — 1,5 — 0,10 0,005 0, 05 0,005 0,05 0,30
min. Rem. 5,5 — 0,15 — — — — — 1,6 — — — — — — —
ISO-MgAl6Ca2 ISO-WD25140 MAX62 B,T,P
max. — 6,5 0,30 0,40 — — — — — 2,5 — 0,10 0,005 0,05 0,005 0,05 0,30
min Rem. 2,5 0,50 0,20 — — 1,0 — — — — — — — — — —
MgAlLi ISO-MgAl3Li2 ISO-WD26110 MAL32 P
0,00 0,00
max. — 3,5 0,8 0,40 — — 3,0 — — — — 0,01 0,005 0,02 0,15
15 05
Min. Rem. 5,5 — 0,15 — — — — — — — — — — — — —
MgAlMn ISO-MgAl6Mn ISO-WD21240 MAM60 B,T,P
max. — 6,5 0,30 0,40 — — — — — — — 0,10 0,005 0,01 0,005 0,05 0,30
min. Rem. 0,50 — 0,10 — — — — — — 0,6 — — — — —
ISO-MgAl1Sn1 ISO-WD25150 MAT11 B,P 0,004
max. — 1,2 — 0,30 — — — — — — 1,2Sn 0,01 — — 0,01 0,15
MgAlSn
min. Rem. 6,0 — 0,2 — — — — — — 0,7 — — — — — —
ISO-MgAl6Sn1 ISO-WD25160 MAT61 B,P
max. — 6,8 — 0,4 — — — — — — 1,3Sn 0,025 0,005 — — 0,05 0,15
min. Rem. 2,5 0 0,6 — — — — — — 0,9 — — — — — —
MgAlSr ISO-MgAl3Sr1 ISO-WD21450 MAJ31 B
max. — 3,5 0,25 0,8 — — — — — — 1,5Sr 0,10 0,02 0,05 0,005 0,05 0,15
Key
B = bars and solid sections
T = tubes and hollow sections
F = forgings
P = plate and sheet
RE = neodymium and other heavy rare earth metals
a
RemAlnder.
b
Zn+Ag.
6 © ISO 2019 – All rights reserved
Table 2 (continued)
Composition
Material designation
% (mass fraction)
Prod-
Alloy
uct
Oth- Oth-
group
Designa- Ele-
form
Symbol Number Mg Al Zn Mn Gd RE Li Zr Y Ca Si Fe Cu Ni ers ers
tion ment
each total
min. Rem. 2,4 0,50 0,15 — — — — — — — — — — — — —
ISO-MgAl3Zn1(A) ISO-WD21150 MAZ31a B,T,F,P
max. — 3,6 1,5 0,40 — — — — — — — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 2,4 0,5 0,05 — — — — — — — — — — — — —
ISO-
ISO-WD21151 MAZ31b B,T,F,P
MgAl3Zn1(B)
max. — 3,6 1,5 0,4 — — — — — — — 0,10 0,05 0,05 0,005 0,05 0,30
min. Rem. 2,5 0,50 0,20 — — — — — — — — — — — — —
ISO-MgAl3Zn1(C) ISO-WD21153 MAZ31c B, P
0,00
max. — 3,5 1,5 0,40 — — — — — — — 0,05 — — 0,02 0,15
MgAlZn
min. Rem. 5,5 0,50 0,15 — — — — — — — — — — — — —
ISO-MgAl6Zn1 ISO-WD21160 MAZ61 B,T,F, P
max. — 6,5 1,5 0,40 — — — — — — — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 7,8 0,20 0,12 — — — — — — — — — — — — —
ISO-MgAl8Zn ISO-WD21170 MAZ80 B,T,F
max. — 9,2 0,8 0,40 — — — — — — — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 8,6 0,35 0,15 — — — — — — — — — — — — —
ISO-MgAl9Zn1 ISO-WD21180 MAZ91 B,T
0,00
max. — 9,5 1,0 0,50 — — — — — — — 0,10 0,05 0,005 0,05 0,30
Key
B = bars and solid sections
T = tubes and hollow sections
F = forgings
P = plate and sheet
RE = neodymium and other heavy rare earth metals
a
RemAlnder.
b
Zn+Ag.
Table 2 (continued)
Composition
Material designation
% (mass fraction)
Prod-
Alloy
uct
Oth- Oth-
group
Designa- Ele-
form
Symbol Number Mg Al Zn Mn Gd RE Li Zr Y Ca Si Fe Cu Ni ers ers
tion ment
each total
min. Rem. 2,4 0,5 0,15 — — — — — 0,7 — — — — — — —
ISO-MgAl3Ca-
ISO-WD22110 MAXZ311 B,T
1Zn1
max. — 3,6 1,0 0,40 — — — — — 1,5 — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 5,5 0,5 0,15 — — — — — 0,7 — — — — — — —
ISO-MgAl6Ca-
ISO-WD22120 MAXZ611 B,T,P
1Zn1
max. — 6,5 1,0 0,40 — — — — — 1,5 — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 5,5 0,5 0,15 — — — — — 1,6 — — — — — — —
ISO-MgAl6Ca-
ISO-WD22130 MAXZ621 B,T,P
2Zn1
max. — 6,5 1,0 0,40 — — — — — 2,5 — 0,10 0,005 0,05 0,005 0,05 0,30
MgAlCa-
Zn
min. Rem. 7,5 0,5 0,15 — — — — — 0,7 — — — — — — —
ISO-MgAl8Ca-
ISO-WD22140 MAXZ811 B, P
1Zn1
max. — 8,5 1,5 0,40 — — — — — 1,5 — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 8,6 0,35 0,15 — — — — — 0,7 — — — — — — —
ISO-MgAl9Ca-
ISO-WD22150 MAXZ911 B,T
1Zn1
max. — 9,5 1,0 0,50 — — — — — 1,5 — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 8,6 0,35 0,15 — — — — — 1,6 — — — — — — —
ISO-MgAl9Ca-
ISO-WD22160 MAXZ921 B,T
2Zn1
max. — 9,5 1,0 0,50 — — — — — 2,5 — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. — 0,3 — 5,5 — — 0,3 3,0 0,002 0,2 — — — — — —
ISO-MgGd6Y4Zn1 ISO-WD69120 MVWZ641 F,P
max. — — 1,0 — 6,5 — — 0,7 4,5 0,020 1,0Ag 0,05 0,02 0,02 0,001 0,01 0,30
min. Rem. — — — 6,5 0,9 — 0,4 4,6 — — — — — — — —
ISO-MgG-
ISO-WD69130 MVWE751 B
d7Y5RE1
max. — — — — 7,5 1,5 — 1,0 5,7 — — 0,01 — 0,10 0,004 — 0,30
min. Rem. — — — 6,5 — — 0,2 5,5 — — — — — — — —
MgGdY ISO-MgGd7Y6 ISO-WD69140 MVW76 B
max. — — — 0,03 7,5 — 0,2 0,5 6,5 — — 0,01 0,010 0,02 0,005 0,01 0,30
min. Rem. — — — 8,0 — — 0,4 2,8 — — — — — — — —
ISO-MgGd8Y3 ISO-WD69150 MVW83 B,F,P
max. — 0,02 0,10 0,05 9,0 — — 0,6 3,5 — — 0,05 0,01 0,02 0,005 0,01 0,15
min. Rem. — 1,0 0,6 7,5 — — — 3,5 — — — — — — — —
ISO-MgGd8Y4Zn2 ISO-WD69160 MVWZ842 B,F,P
max. — — 2,0 1,0 9,0 — — — 5,0 — — 0,05 0,01 0,02 0,005 0,01 0,15
Key
B = bars and solid sections
T = tubes and hollow sections
F = forgings
P = plate and sheet
RE = neodymium and other heavy rare earth metals
a
RemAlnder.
b
Zn+Ag.
8 © ISO 2019 – All rights reserved
Table 2 (continued)
Composition
Material designation
% (mass fraction)
Prod-
Alloy
uct
Oth- Oth-
group
Designa- Ele-
form
Symbol Number Mg Al Zn Mn Gd RE Li Zr Y Ca Si Fe Cu Ni ers ers
tion ment
each total
min. Rem. — — — 3,8 — — 0,8 — — — — — — — — —
MgGdZr ISO-MgGd4Zr1 ISO-WD69170 MVK41 B
max. — — — 0,01 4,2 — — 1,2 — — — 0,02 0,01 0,05 0,01 0,03 0,30
min. Rem. — 0,5 — — — 8,5 — — — — — — — — — —
MgLiZn ISO-MgLi9Zn1 ISO-WD96110 MLZ91 B,T,P
max. — 0,05 1,5 0,05 — — 9,5 — — 0,05 — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 2,5 2,5 — — — 3,5 — — — — — — — — — —
ISO-MgLi4Al3Zn3 ISO-WD96120 MLAZ433 P
max. — 3,5 3,5 — — — 4,5 — — — — 0,5 0,05 0,05 — 0,05 0,30
MgLiAl
Zn
min. Rem. 2,5 2,5 — — — 9,5 — — — — — — — — — —
ISO-MgLi-
ISO-WD96130 MLAZ1033 P
10Al3Zn3
max. — 3,5 3,5 — — — 10,5 — — — — 0,5 0,05 0,05 — 0,05 0,30
min. Rem. — — 1,2 — — — — — — — — — — — — —
MgMn ISO-MgMn2 ISO-WD43150 MM2 B,T
max. — — — 2,0 — — — — — — — 0,10 — 0,05 0,01 0,05 0,30
min. Rem. — — — — 2,4 — 0,4 3,7 — — — — — — — —
ISO-MgY4RE3Z-
ISO-WD95360 MWEK431b B,F
r1(B)
b
max. — — 0,20 0,03 — 4,4 0,2 1,0 4,3 — — 0,01 0,01 0,02 0,005 0,01 0,30
min. Rem. — — — — 2,4 — 0,4 3,7 — — — — — — — —
ISO-MgY4RE3Z-
ISO-WD95370 MWEK431c B,P
0,00
r(C)
max. — — 0,06 0,03 — 4,4 — 1,0 4,3 — — — 0,005 0,02 0,01 0,30
MgYRE
min. Rem. — — — — 1,5 — 0,4 4,75 — — — — — — — —
ISO-MgY5RE4Zr1 ISO-WD95350 MWEK541 B,F
Zr
a
max. — — 0,20 0,03 — 4,0 0,2 1,0 5,5 — — 0,01 0,01 0,02 0,005 0,01 0,30
min. Rem. — — — — 0,7 — 0,4 6,7 — — — — — — — —
ISO-MgY7RE1Zr1 ISO-WD95380 MWEK711 B
max. — — — — — 2,0 — 1,0 8,5 — — 0,01 0,05 — 0,004 — 0,30
min. Rem. — — — — 0,7 — 0,4 8,2 — — — — — — — —
ISO-MgY9RE1Zr1 ISO-WD95390 MWEK911 B
max. — — — — — 1,9 — 1,0 9,5 — — 0,01 — — 0,004 — 0,30
Key
B = bars and solid sections
T = tubes and hollow sections
F = forgings
P = plate and sheet
RE = neodymium and other heavy rare earth metals
a
RemAlnder.
b
Zn+Ag.
Table 2 (continued)
Composition
Material designation
% (mass fraction)
Prod-
Alloy
uct
Oth- Oth-
group
Designa- Ele-
form
Symbol Number Mg Al Zn Mn Gd RE Li Zr Y Ca Si Fe Cu Ni ers ers
tion ment
each total
min. Rem. — 2,0 — — — — — 6,2 — — — — — — — —
ISO-MgY7Zn3 ISO-WD96110 MWZ73 B,T,P
max. — — 3,0 — — — — — 7,4 — — 0,10 0,005 0,05 0,005 0,05 0,30
MgYZn
min. Rem. — 4,5 — — — — — 6,2 — — — — — — — —
ISO-MgY7Zn5 ISO-WD96120 MWZ75 B,T,P
max. — — 5,5 — — — — — 7,4 — — 0,10 0,005 0,05 0,005 0,05 0,30
min. Rem. 0,5 6,0 0,30 — — — — — — — — — 0,5 — — —
ISO-MgZn8Al-
MgZnAl ISO-WD32110 MZAC811 B
1Cu1
max. — 1,5 8,0 0,70 — — — — — — — 0,01 0,01 1,0 0,01 — —
min. Rem. — 1,5 — — 0,2 — — — — — — 0,30 — — —
MgZnCu ISO-MgZn2Cu ISO-WD32120 MZC20 P
max. — —
...