PROPRIETARY BÖHLER K945 Tool steels

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

Data updates

Latest Update: 2023-02
Total number of updates: 3
Update History
2021-02 2021-01

This material has 30 properties — only a subset is shown here.

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PROPRIETARY BÖHLER K945 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.48
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
0.70
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.035
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 BÖHLER K945 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Electrical Resistivity
0.12 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
50 W/(m∙°C)
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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 BÖHLER K945 Heat Treatments

  • Normalizing: 850°C, air cooling
    Annealing:
    680 to 710°C Slow controlled cooling in furnace at a rate of 10 to 20°C/h down to approx. 600°C, further cooling in air.
    Stress relieving:
    600 to 650°C Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1-2 hours.
    Hardening: 800 to 830°C/ water. Holding time at hardening temperature 10 to 20 minutes. Hardness penetration for 30 mm square (average values): 3 - 5 mm; Full hardening diameter (average values): 15 mm.
    Tempering:     Slow cooling to tempering temperature immediately after hardening/time in furnace 1 hour for each 20 mm of work piece thickness but at least 1 hour / cooling in air. For average hardness figures to be obtained please refer to the tempering chart.

PROPRIETARY BÖHLER K945 Mechanical Properties

Temperature

PROPERTY / VALUE
Brinell Hardness (HB)
≤ 190
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Rockwell Hardness (HR)
47.5 — 58
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  • -Cross References
  • 5Composition
  • 8Mechanical Properties
  • 14Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 2Total Suppliers