SAE EV31A Magnesium Alloys

Material group: Nonferrous Alloys / Magnesium Alloys

Country / Standard: United States / SAE

Data updates

Latest Update: 2020-11

Total number of updates: 7

Update History

2019-12 2019-07 2019-04 2018-09 2018-01 2017-11

This material has 76 properties — only a subset is shown here.

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SAE EV31A Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.05

UNIT

CAS NUMBER

7440-22-4

CRITERIA

VALUE

≤ 0.01

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

≤ 0.010

UNIT

CAS NUMBER

7439-89-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-54-2

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-95-4

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-00-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

Other each

VALUE

val1

UNIT

CAS NUMBER

CRITERIA

Rare Earths (RE)

VALUE

val1

UNIT

CAS NUMBER

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-66-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-67-7

SAE AMS 4429B: 2019 / Magnesium Alloy Castings, Sand 2.8Nd - 1.4Gd - 0.4Zn - 0.6Zr (EV31A - T6) Solution and Precipitation Heat Treated

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SAE EV31A Physical Properties

Temperature

0 - 30°C 30 - 100°C 100 - 300°C

PROPERTY / VALUE

Compression Modulus

45 GPa

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Modulus of Elasticity

45 GPa

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Density

val1 kg/dm³

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Shear Modulus

val1 GPa

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Poisson Coefficient

val1

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This material has 76 properties — only a subset is shown here.

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SAE EV31A Heat Treatments

Solution heat treatment
Heated at 959-975°F (515-524°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 6-8 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.
Quenched in water (or other suitable media) held at 140-196°F (60-91°C). During the quench, the quenchant temperature shall not rise more than 25°F (14°C).
Aging (precipitation heat treatment)
Temper T6 - artificial aging from the solution heat treated (T4) temper. Heated for 12-16 hours at 392 to 400°F (200 to 204°C). Protective atmosphere is not required.
Rework solution heat treatment
Heated at 950°F (510°C). Recommended soaking time is 1-2 hours.
Quenched in water (or other suitable media) held at 140-196°F (60-91°C).
At least one set of tensile specimens shall, during each stage of heat treatment, be put into a batch type furnace with each load of castings or into a continuous furnace at intervals of no longer than 3 hours.

SAE EV31A Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

≥ 248 MPa

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Brinell Hardness (HB)

62 — 85

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Compression Yield Strength

val1 MPa

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Elongation, A

≥ 2 %

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Yield Strength, Rp0.2

val1 MPa

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SAE EV31A International Equivalent Materials

Showing 3 of 6 results.

MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

B 951 M12310

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Composition 100%

MATERIAL

B 951 EV31A

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Composition 100%

MATERIAL

B 80 EV31A

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Composition 100%

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

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6Cross References

22Composition
22Mechanical Properties
10Physical Properties
3Heat Treatment
-Metallography
-Machinability

10Stress-Strain
-Formability
-Fatigue
-Fracture
-Creep

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
3Ageing
-Weatherability
-Irradiation

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