PROPRIETARY BÖHLER K390 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

2022-12 2022-09 2021-01

This material has 51 properties — only a subset is shown here.

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PROPRIETARY BÖHLER K390 MICROCLEAN Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

2.47

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

2.00

UNIT

CAS NUMBER

7440-48-4

CRITERIA

VALUE

4.20

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-33-7

Böhler Edelstahl, Product Data Sheets,

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PROPRIETARY BÖHLER K390 MICROCLEAN Physical Properties

Temperature

0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 220 GPa

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Electrical Resistivity

0.59 Ω∙mm²/m

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Density

val1 kg/dm³

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Electrical Conductivity

val1 S/m

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Heat Capacity

val1 J/(kg∙°C)

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Thermal Conductivity

21.5 W/(m∙°C)

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Poisson Coefficient

val1

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This material has 51 properties — only a subset is shown here.

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PROPRIETARY BÖHLER K390 MICROCLEAN Heat Treatments

Stress relieving: 650-700°C (1202-1292°F), once heated completely through, soak in neutral atmosphere at temperature for 1 to 2 hours; slow cooling in furnace.

Hardening and tempering: 1030-1180°C (1886-2156°F); Oil, N₂. Holding time after temperature equalization: 20 to 30 minutes (hardening temperature 1030-1150°C (1886-2102°F)) and 10 min (hardening temperature 1180°C (2156°F). Low hardening temperature for high toughness. High hardening temperature for high wear resistance. After hardening, tempering to the desired working hardness according to the tempering chart.

PROPRIETARY BÖHLER K390 MICROCLEAN Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Brinell Hardness (HB)

≤ 280

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Rockwell Hardness (HR)

53 — 65.9

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-Cross References

8Composition
25Mechanical Properties
15Physical Properties
2Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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