PROPRIETARY BÖHLER M314 EXTRA Tool steels

Material group: Ferrous Alloys / Tool steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2022-10

Total number of updates: 3

Update History

2022-09 2018-02

This material has 20 properties — only a subset is shown here.

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PROPRIETARY BÖHLER M314 EXTRA Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.34

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

16.0

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

1.40

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

Böhler-Uddeholm AG, Product Data Sheets,

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PROPRIETARY BÖHLER M314 EXTRA Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 212 GPa

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Electrical Resistivity

0.65 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

18 W/(m∙°C)

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Poisson Coefficient

val1

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This material has 20 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

PROPRIETARY BÖHLER M314 EXTRA Heat Treatments

As-delivered condition: M314 Extra is intended to be used in the as-delivered condition; that is, hardened and tempered to ~300 Brinell. If this needs to be adjusted, the steel must first be soft annealed and then heat treated according to the recommendations listed below. Note: the tool must be protected from decarburization and/or oxidation during the heat treating process.
Soft Annealing: The steel must be held in a protective atmosphere up to a temperature of 860°C. After reaching this annealing temperature the steel must be cooled slowly at a rate of 20°C per hour down to 650°C, then cooling can be completed freely in air.
Hardening: The tool must be held in a protective atmosphere throughout the hardening process. Preheat temperature at 500-600°C; Austenitizing/Hardening Temperature at 1000-1050°C. The steel should be heated through to the appropriate hardening temperature and then held at this temperature for 30 minutes. This soak time is measured from the point at which the core of the block has reached the designated temperature.
Quenching: Quenching should be as rapid as possible to avoid unwanted transformation products. Complex geometries and thick cross sections may require an interrupted quench procedure to prevent excessive distortion and/or cracking. (i.e. step or marquenching/martempering). Regardless of the quenching process the tooling must be tempered after reaching 65°C.
Tempering: Select the tempering temperature from the tempering curve based on the hardness requirements. A minimum of two tempers with intermittent cooling to room temperature is required. Holding time at temperature for a minimum of two hours is recommended for each tempering cycle.

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-Cross References

6Composition
-Mechanical Properties
9Physical Properties
2Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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