PROPRIETARY Silicon Core Iron B-FM Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2021-08

Total number of updates: 3

Update History

2016-02 2014-09

This material has 25 properties — only a subset is shown here.

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PROPRIETARY Silicon Core Iron B-FM Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.03

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

Balance

UNIT

CAS NUMBER

7439-89-6

CRITERIA

VALUE

0.40

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

Carpenter Technology Corporation, Product Data Sheets,

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PROPRIETARY Silicon Core Iron B-FM Physical Properties

Temperature

0 - 30°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Electrical Resistivity

0.4 Ω∙mm²/m

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Density

7.634 — 7.86 kg/dm³

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Electrical Conductivity

val1 S/m

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Poisson Coefficient

val1

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This material has 25 properties — only a subset is shown here.

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PROPRIETARY Silicon Core Iron B-FM Heat Treatments

Finish fabricated parts must be heat treated to achieve soft magnetic characteristics. Suggested heat treating atmosphere is a wet hydrogen atmosphere in the temperature range of 843-871°C (1550-1600°F), 2-4 hours at temperature and cooled at a rate of 38-93°C/h (100-200°F/h) to 538°C (1000°F) and any rate thereafter.
Other heat treating atmospheres can be employed, such as nitrogen-hydrogen combinations, vacuum, exothermication and inert atmosphere retort. Resulting magnetic characteristics will not be as good as the wet hydrogen atmosphere, which provides the best degree of decarburization.
Other heat treatment temperatures in the range of 732°C (1350°F) to 1038°C (1900°F) can be employed to achieve certain advantages such as brazing and fine grain size as required by end application. A sacrifice in certain magnetic characteristics will be realized. A dry atmosphere must be employed at 954°C (1750°F) and above.
Annealed (for magnetic properties): 843°C (1550°F), 4h.

PROPRIETARY Silicon Core Iron B-FM Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

552 — 586 MPa

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Elongation, A

40 %

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Rockwell Hardness (HR)

val1

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Yield Strength, Rp0.2

448 — 483 MPa

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-Cross References

5Composition
7Mechanical Properties
11Physical Properties
1Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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