SAE AZ91C Magnesium Alloys

Material group: Nonferrous Alloys / Magnesium Alloys
Country / Standard: United States / SAE

Data updates

Latest Update: 2025-12
Total number of updates: 14
Update History

This material has 295 properties — only a subset is shown here.

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SAE AZ91C Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
8.1 – 9.3
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
Cu
VALUE
≤ 0.10
UNIT
%
CAS NUMBER
7440-50-8
CRITERIA
Mg
VALUE
Remainder
UNIT
%
CAS NUMBER
7439-95-4
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
Other total
VALUE
val1
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UNIT
%
CAS NUMBER
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
Zn
VALUE
val1
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UNIT
%
CAS NUMBER
7440-66-6

SAE J465: 2018 / Magnesium casting alloys

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SAE AZ91C Physical Properties

Temperature

PROPERTY / VALUE
Compression Modulus
45 GPa
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Modulus of Elasticity
44 — 45 GPa
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Electrical Resistivity
val1
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Ω∙mm²/m
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Density
val1
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kg/dm³
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Heat Capacity
val1
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J/(kg∙°C)
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Thermal Conductivity
val1
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W/(m∙°C)
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Electrical Conductivity
val1
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S/m
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Melting Temperature
val1
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°C
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Poisson Coefficient
val1
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Service Temperature
val1
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°C
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Shear Modulus
val1
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GPa
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Coefficient of Thermal Expansion (CTE)
val1
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10-6/°C
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This material has 295 properties — only a subset is shown here.

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SAE AZ91C Heat Treatments

  • Solution heat treatment
    Heated at 770-785°F (410-418°C). Incremental steps or a uniform heating rate shall be used to prevent eutectic melting which can irreversibly damage castings. A protective atmosphere containing sufficient sulfur dioxide, carbon dioxide, or satisfactory oxidation inhibitor shall be used when solution heat treating at or above 750°F (399°C). Recommended soaking time is 16-24 hours (soaking time starts when all temperature control sensing elements are within 10°F (6°C) of the set or offset temperature). Heavy section castings, t ≥ 25.4 mm, may require longer soaking time than indicated. Parts should be quenched after being soaked at the solution heat treating temperature. During the quench, the quenchant temperature shall not rise more than 25°F (14°C).
    Aging (precipitation heat treatment)
    Temper T5 (artificial aging from the as-cast (F) condition) and Temper T6 (artificial aging from the solution heat treated (T4) temper): heated for 4 hours at 425°F (218°C) or 16 hours at 335°F (168°C). Protective atmosphere is not required.
    Rework solution heat treatment
    Heating at 775°F (413°C). Recommended soaking time is half an hour.

SAE AZ91C Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 117 MPa
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Brinell Hardness (HB)
val1
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Elongation, A
val1
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%
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Rockwell Hardness (HR)
val1
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Yield Strength, Rp0.2
val1
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MPa
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Compression Yield Strength
val1
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MPa
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SAE AZ91C International Equivalent Materials

Showing 15 of 21 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
MCI2C
STANDARD
JIS
COUNTRY / PRODUCER
Japan
EQUIVALENCE CATEGORY
Official
MATERIAL
M11914
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
G-MgAl9Zn1 ho
STANDARD
DIN
COUNTRY / PRODUCER
Germany
EQUIVALENCE CATEGORY
Implicit
MATERIAL
G-MgAl9Zn1 wa
STANDARD
DIN
COUNTRY / PRODUCER
Germany
EQUIVALENCE CATEGORY
Implicit
MATERIAL
AZ91C
STANDARD
MIL
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
3.5194
STANDARD
WL
COUNTRY / PRODUCER
Germany
EQUIVALENCE CATEGORY
Official
MATERIAL
B 199 AZ91C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
B 403 AZ91C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
B 80 AZ91C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
B 93 AZ91C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
L122
STANDARD
B.S.
COUNTRY / PRODUCER
United Kingdom
EQUIVALENCE CATEGORY
Implicit
MATERIAL
3.5912.43
STANDARD
DIN
COUNTRY / PRODUCER
Germany
EQUIVALENCE CATEGORY
Implicit
MATERIAL
3.5912.61
STANDARD
DIN
COUNTRY / PRODUCER
Germany
EQUIVALENCE CATEGORY
Implicit
MATERIAL
504
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
ML5on
STANDARD
GOST
COUNTRY / PRODUCER
Russia
EQUIVALENCE CATEGORY
Implicit

Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.

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  • 21Cross References
  • 26Composition
  • 102Mechanical Properties
  • 97Physical Properties
  • 1Heat Treatment
  • -Metallography
  • 1Machinability
  • 26Stress-Strain
  • -Formability
  • 16Fatigue
  • -Fracture
  • 2Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • 1Ageing
  • -Weatherability
  • -Irradiation
  • 2Total Suppliers