BÖHLER K945 (PROPRIETARY) Material Properties

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

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Brinell Hardness (HB) ≤ 190 view details
Rockwell Hardness (HR) 48 — 58 view details
Brinell Hardness (HB) ≤ 190 view details
Rockwell Hardness (HR) 48 — 58 view details

Physical Properties

Temperature

0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Density val1
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kg/dm³ view details
Poisson Coefficient val1
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view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Thermal Conductivity 50 W/(m∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Electrical Resistivity 0.12 Ω∙mm²/m view details
Electrical Conductivity val1
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S/m view details
Modulus of Elasticity 190 — 210 GPa view details
Density val1
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kg/dm³ view details
Poisson Coefficient val1
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view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Thermal Conductivity 50 W/(m∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Electrical Resistivity 0.12 Ω∙mm²/m view details
Electrical Conductivity val1
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S/m view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
val1
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UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
val1
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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

Böhler Edelstahl, Product Data Sheets / Available at: www.bohler-edelstahl.com, visited 2015

Heat Treatments

  • <b>Normalizing:</b> 850°C, air cooling<br> <b>Annealing:</b> <br> 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.<br> <b>Stress relieving:</b><br> 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.<br> <b>Hardening:</b> 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.<b><br>Tempering:</b> 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.