PROPRIETARY BÖHLER N404 ISOEXTRA Stainless steels

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

Data updates

Latest Update: 2021-04
Total number of updates: 1
Update History

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PROPRIETARY BÖHLER N404 ISOEXTRA Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.04
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
15.40
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.40
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

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PROPRIETARY BÖHLER N404 ISOEXTRA Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Thermal Conductivity
val1
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W/(m∙°C)
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Electrical Resistivity
val1
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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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Heat Capacity
val1
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J/(kg∙°C)
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Poisson Coefficient
val1
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Service Temperature
val1
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°C
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This material has 100 properties — only a subset is shown here.

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PROPRIETARY BÖHLER N404 ISOEXTRA Heat Treatments

  • Hot forming
    1150 to 900°C / Air cooling
    Annealing: 600 to 650°C / air or furnace cooling.
    Stress relieving: 530 to 570°C In the condition as hardened and tempered appr. 30 - 50°C below the actual tempering temperature. After through heating, hold in neutral atmosphere 1 - 2 hours / slow cooling in furnace.
    Hardening:
    Bar, forgings
    950 to 1050°C / Oil, air
    Sheet or plate:
    900 to 1000°C / Oil, air, water
    Tempering
    Bar, forgings:
    I.....590 to 620°C /(2 x 4 h or 1 x 8 h)
    II....550 to 620°C
    Sheet or plate:
    570 to 650°C
    Structure as soft annealed:
    Ferrite + carbide
    Structure as hardened and tempered:
    Tempered martensite

PROPRIETARY BÖHLER N404 ISOEXTRA Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
760 — 1288.6 MPa
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Brinell Hardness (HB)
≤ 320
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Elongation, A
≥ 8.1 %
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Yield Strength, Rp0.2
val1
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MPa
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Impact Energy
val1
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J
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Reduction of Area
val1
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%
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  • -Cross References
  • 7Composition
  • 62Mechanical Properties
  • 18Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • 11Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 1Total Suppliers