PROPRIETARY BÖHLER S390 MICROCLEAN Tool steels

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

Data updates

Latest Update: 2025-01
Total number of updates: 3
Update History
2022-09 2017-08

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PROPRIETARY BÖHLER S390 MICROCLEAN Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
1.64
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Co
VALUE
8.00
UNIT
%
CAS NUMBER
7440-48-4
CRITERIA
Cr
VALUE
4.80
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2
CRITERIA
W
VALUE
val1
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UNIT
%
CAS NUMBER
7440-33-7

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PROPRIETARY BÖHLER S390 MICROCLEAN Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 231 GPa
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Electrical Resistivity
0.61 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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Thermal Conductivity
17 W/(m∙°C)
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Poisson Coefficient
val1
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This material has 50 properties — only a subset is shown here.

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PROPRIETARY BÖHLER S390 MICROCLEAN Heat Treatments


  • Annealing: 770-840°C (1418-1544°F), 4 h, controlled slow cooling in furnace (10 to 20°C/h / (18 to 36°F/h) to 740°C/2h (1364°F/2h), cooling in furnace.

    Stress relieving: 600-650°C (1112-1202°F), slow cooling in furnace. To relieve stresses set up by extensive machining or in tools of intricate shape. After through heating, hold in neutral atmosphere for 1 to 2 hours.

    Hardening and Tempering: 1100-1230°C (2012-2246°F), salt bath, vacuum. Preheating: 1st stage ~ 500°C (930°F), 2nd stage ~ 850°C (1560°F), 3rd stage ~1050°C (1920°F). Austenitising: 1100-1230°C (2012°F-2246°F), holding time after complete heating 80 seconds, maximum 150 seconds, to avoid material damage due to overheating. Quenching: oil, warm bath (500-550°C (930°F-1020°F)), gas.
    550-570°C (1022-1058°F), slow heating to tempering temperature immediately after austenitising. Holding time in the furnace 1 hour per 20 mm material thickness (at least 1 hour). Slow cooling to room temperature between each tempering step. 3 tempering cycles recommended.

PROPRIETARY BÖHLER S390 MICROCLEAN Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
≤ 1080 MPa
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Brinell Hardness (HB)
≤ 320
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Rockwell Hardness (HR)
51.1 — 68
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PROPRIETARY BÖHLER S390 MICROCLEAN International Equivalent Materials


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MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Implicit

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  • 5Cross References

  • 6Composition
  • 17Mechanical Properties
  • 16Physical Properties
  • 2Heat Treatment
  • -Metallography
  • -Machinability

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

  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology

  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation

  • 4Total Suppliers