ASTM A 848 Type 2 Magnetic and electrical materials

Material group: Ferrous Alloys / Magnetic and electrical materials

Country / Standard: United States / ASTM

Data updates

Latest Update: 2026-05

Total number of updates: 1

Update History

This material has 45 properties — only a subset is shown here.

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ASTM A 848 Type 2 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.10

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

≤ 0.020

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

≤ 0.20

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-89-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-32-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

A848: 2017 / Standard Specification for Low-Carbon Magnetic Iron

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ASTM A 848 Type 2 Physical Properties

Temperature

0 - 30°C 100 - 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Electrical Resistivity

1.3 Ω∙mm²/m

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Density

val1 kg/dm³

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Electrical Conductivity

val1 S/m

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Heat Capacity

val1 J/(kg∙°C)

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Thermal Conductivity

73.2 W/(m∙°C)

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Poisson Coefficient

val1

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This material has 45 properties — only a subset is shown here.

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ASTM A 848 Type 2 Heat Treatments

Magnetic test specimens shall be heat treated in as following: When “Relay condition” is specified, the test specimen shall be heat treated in a dry forming gas atmosphere (5 to 15 % hydrogen in nitrogen with a dew point less than -40°C (–40°F)) at a temperature of 845°C (1550°F) for one hour at temperature and cooled at a rate from 55 to 100°C per hour (99 to 180°F per hour) to 500°C (930°F) and cooled at any rate thereafter. The magnetic behavior of parts can be stabilized by heating to 175 to 260°C (347 to 500°F) for several hours to cause over aging.
Parts fabricated from magnetic iron can be heat treated in several different manners depending on the application and the heat-treating equipment available. The lowest suggested heat treatment temperature is 700°C (1290°F). These alloys are ferritic up to a temperature of about 890°C (1635°F). Above this temperature austenite forms. Decarburization is most readily obtained in the ferritic state. Heat treatment in the austenite phase (at tempera-tures above 890°C (1635°F)) will result in grain size refinement upon cooling through the austenite to ferrite transformation.
A suggested high temperature heat treatment procedure is: heat to and hold at 850°C ± 25°C (1560°F ± 45 °F) for four hours in wet hydrogen, purge out wet hydrogen with dry hydrogen and heat to 1120°C (2048°F) and hold at temperature for four hours then cool at a rate of 55°C to 100°C per hour (99°F to 180°F per hour) to a temperature of 550°C (1022°C) followed by cooling at any convenient rate.

ASTM A 848 Type 2 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

310 — 450 MPa

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Elongation, A

15 — 47 %

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Rockwell Hardness (HR)

val1

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Yield Strength, Rp0.2

250 — 380 MPa

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ASTM A 848 Type 2 International Equivalent Materials

Showing 5 of 5 results.

MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

A 848

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Official

MATERIAL

Carpenter Electrical Iron

STANDARD

PROPRIETARY

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

Implicit

MATERIAL

Carpenter Silicon Core Iron A

STANDARD

PROPRIETARY

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

Implicit

MATERIAL

A 848 Type 1

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

MATERIAL

Consumet Electrical Iron

STANDARD

PROPRIETARY

COUNTRY / PRODUCER

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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5Cross References

11Composition
12Mechanical Properties
9Physical Properties
1Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
3Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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