SAE HK31A Magnesium Alloys

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

Data updates

Latest Update: 2026-05
Total number of updates: 7
Update History

This material has 598 properties — only a subset is shown here.

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SAE HK31A Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Cu
VALUE
≤ 0.10
UNIT
%
CAS NUMBER
7440-50-8
CRITERIA
Mg
VALUE
Remainder
UNIT
%
CAS NUMBER
7439-95-4
CRITERIA
Ni
VALUE
≤ 0.01
UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
Other total
VALUE
val1
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UNIT
%
CAS NUMBER
CRITERIA
Th
VALUE
val1
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UNIT
%
CAS NUMBER
7440-29-1
CRITERIA
Zn
VALUE
val1
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UNIT
%
CAS NUMBER
7440-66-6
CRITERIA
Zr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-67-7

SAE J465: 2018 / Magnesium casting alloys

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SAE HK31A Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
44.8 — 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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Melting Temperature
val1
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°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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This material has 598 properties — only a subset is shown here.

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SAE HK31A Heat Treatments


  • Solution heat treatment: heat to 1050°F ± 15 (565°C ± 8), hold at heat for not less than 2 hr, and cool in air. Precipitation heat treatment: heat to 400°F ± 10 (205°C ± 5), hold at heat for not less than 16 hr, and cool in air.

SAE HK31A Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
130 — 264.8 MPa
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Elongation, A
val1
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%
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Yield Strength, Rp0.2
val1
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MPa
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Impact Energy
val1
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J
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SAE HK31A International Equivalent Materials


Showing 5 of 5 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
STANDARD
MIL
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
STANDARD
MIL
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official

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

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  • 5Cross References

  • 31Composition
  • 292Mechanical Properties
  • 77Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

  • 105Stress-Strain
  • -Formability
  • 9Fatigue
  • -Fracture
  • 3Creep

  • 3Joints
  • -Coatings
  • -Dimensions
  • -Tribology

  • -Corrosion
  • 71Ageing
  • -Weatherability
  • -Irradiation

  • 1Total Suppliers