PROPRIETARY Type 440A Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country / Standard: PROPRIETARY

Data updates

Latest Update: 2021-09
Total number of updates: 3
Update History
2021-07 2017-05

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PROPRIETARY Type 440A Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.06 – 0.75
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
16.0 – 18.0
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 1.00
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
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

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PROPRIETARY Type 440A Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Electrical Resistivity
0.6 Ω∙mm²/m
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Density
val1
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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 30 properties — only a subset is shown here.

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PROPRIETARY Type 440A Heat Treatments

  • Full annealing: heat uniformly at 816 - 871°C (1500 - 1600°F), soak and cool slowly in furnace to 538 - 649°C (1000 - 1200°F) at a rate of 11 - 27°C (20 - 50 °F) per hour, then cool in air, oil or water.
    Process annealing: heat at 732 - 788°C (1350 - 1450°F), then cool very slowly in the furnace.
    Hardening: preheat slowly to 788°C (1450°F) and soak, then raise temperature to 1010 - 1066°C (1850 - 1950°F), quench in warm oil or air. Stress relieve immediately. A subzero treatment of -73°C (-100°F) is recommended in order to obtain maximum hardness.
    Stress relieving: heat to 149 - 427°C (300 - 800°F) for 1 to 3 hours, air cool.

PROPRIETARY Type 440A Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
724 — 1793 MPa
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Elongation, A
5 — 20 %
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Rockwell Hardness (HR)
val1
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Yield Strength, Rp0.2
414 — 1655 MPa
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  • -Cross References
  • 7Composition
  • 8Mechanical Properties
  • 10Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • 2Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 2Total Suppliers