PROPRIETARY BÖHLER S790 MICROCLEAN Tool steels

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

Data updates

Latest Update: 2025-01
Total number of updates: 4
Update History
2024-12 2022-10 2021-01

This material has 279 properties — only a subset is shown here.

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PROPRIETARY BÖHLER S790 MICROCLEAN Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
1.3
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
4.2
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mo
VALUE
5
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

Böhler Edelstahl, Product Data Sheets,

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PROPRIETARY BÖHLER S790 MICROCLEAN Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 230 GPa
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Electrical Resistivity
0.54 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
24 W/(m∙°C)
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Poisson Coefficient
val1
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This material has 279 properties — only a subset is shown here.

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PROPRIETARY BÖHLER S790 MICROCLEAN Heat Treatments


  • Annealing: 870-900°C (1598-1652°F); The steel needs to be protected against decarburization. Through heating of the material is followed by controlled, slow furnace cooling at a maximum cooling rate of 10°C (18°F) per hour, down to approx. 700°C (1292°F). Final cooling in air.

    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: 1050-1200°C (1922-2192°F), salt bath, vacuum. Preheating: 1st stage ~500°C, 2nd stage ~850°C, 3rd stage ~1050°C (for higher austenitising temperature). Austenitising: for cutting applications at higher austenitising temperatures (> 1130°C), holding time after complete heating 80 seconds, maximum 150 seconds, to avoid material damage due to overtime. Austenitising: for cold work applications at lower austenitising temperatures (< 1100°C). Holding time after complete heating 15 to 30 min. Quenching: oil, warm bath (500-550°C), gas.
    560-580°C (1040-1076°F), slow heating to tempering temperature immediately after austenitising. Dwell 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 S790 MICROCLEAN Mechanical Properties


Temperature

PROPERTY / VALUE
Brinell Hardness (HB)
≤ 280
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Rockwell Hardness (HR)
56 — 66.9
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PROPRIETARY BÖHLER S790 MICROCLEAN International Equivalent Materials


Showing 15 of 134 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
GB
COUNTRY / PRODUCER
China
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
EU
COUNTRY / PRODUCER
European Union
EQUIVALENCE CATEGORY
Implicit
STANDARD
AFNOR NF
COUNTRY / PRODUCER
France
EQUIVALENCE CATEGORY
Implicit
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STANDARD
GB
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China
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Implicit
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STANDARD
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Japan
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United States
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Implicit
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United States
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Implicit
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ASTM
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United States
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Implicit
STANDARD
PROPRIETARY
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MATERIAL
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PROPRIETARY
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PROPRIETARY
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STANDARD
PROPRIETARY
COUNTRY / PRODUCER
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STANDARD
PROPRIETARY
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STANDARD
UNI
COUNTRY / PRODUCER
Italy
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Implicit

Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.

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  • 134Cross References

  • 5Composition
  • 13Mechanical Properties
  • 16Physical Properties
  • 2Heat Treatment
  • 2Metallography
  • 1Machinability

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

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

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

  • 106Total Suppliers