ASTM A 867 Type 1 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country / Standard: United States / ASTM

Data updates

Latest Update: 2019-10
Total number of updates: 1
Update History

This material has 35 properties — only a subset is shown here.

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ASTM A 867 Type 1 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.35
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
≤ 0.04
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Fe
VALUE
Balance. Not analyzed nor is it reported
UNIT
%
CAS NUMBER
7439-89-6
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

A867: 2024 / Iron-Silicon Relay Steels

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ASTM A 867 Type 1 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Electrical Resistivity
0.25 Ω∙mm²/m
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Density
7.67 — 7.86 kg/dm³
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Electrical Conductivity
val1
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S/m
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Poisson Coefficient
val1
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This material has 35 properties — only a subset is shown here.

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ASTM A 867 Type 1 Heat Treatments

  • The test specimen shall be heat treated before testing as follows: Heat at 845 ± 10°C (1553 ± 18°F) for 4 hours in a wet hydrogen atmosphere (dew point of −20 to 5°C (–4°F to 41°F)) then cool at a rate of 68 to 118°C per hour (122 to 212°F per hour) to a temperature less than 540°C (1000°F) followed by further cooling at any convenient rate.
    Heat treatment of parts made from iron-silicon relay steels is necessary to obtain the best magnetic performance. Magnetic behavior improves (that is, permeability increases and coercive field strength decreases) when heat treating is performed at temperatures as low as 700°C (1292°F). Decline in magnetic performance when heat treated above 870°C (1598°F) as a result of austenitization and subsequent grain refinement upon cooling. Most commonly, heat treatment is conducted at temperatures of approximately 840°C (1544°F) for a minimum of 2 hours followed by slow cooling.
    Further improvement in magnetic characteristics is achievable by using a higher dew-point (−20 to 5°C) (–4 to 41°F) hydrogen or forming gas atmosphere to promote decarburization. However, high dew-point atmospheres should not be used at temperatures in excess of 950°C (1742°F) and when the part produced from this type of steel is to be plated after heat treatment.

ASTM A 867 Type 1 Mechanical Properties

Temperature

PROPERTY / VALUE
Rockwell Hardness (HR)
50 — 60
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  • 1Cross References
  • 7Composition
  • 2Mechanical Properties
  • 8Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • 16Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
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