PROPRIETARY CPM 420 V Tool steels

Material group: Ferrous Alloys / Tool steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2014-04

Total number of updates: 1

Update History

This material has 26 properties — only a subset is shown here.

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PROPRIETARY CPM 420 V Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

2.3000

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

14.0000

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

0.5000

UNIT

CAS NUMBER

7439-95-4

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

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PROPRIETARY CPM 420 V Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Density

7.4 — 8 kg/dm³

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Poisson Coefficient

val1

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This material has 26 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

PROPRIETARY CPM 420 V Heat Treatments

SOFT ANNEALING heated uniformly at a temperature of 900 °C; maintain the temperature for 2 hours and allow to cool slowly to 600 °C in the furnace at a cooling rate of max. 15 °C per hour. It is then further cooled in still air. The hardness achieved by soft annealing is approx. HB 275. STRESS RELIEVING After machining it is recommended to subject the work piece to a stress relieving process at a temperature of 600 – 700 °C for a thermal holding period of 2 hours du-ration. HARDENING is to be preheated slowly and thoroughly to a temperature of 840 - 870 °C. Further heating in the furnace continues until an austenitizing temperature of 1150 – 1180 °C is reached. The holding time after com-plete penetration amounts to 10 – 30 minutes (lower temperatures require longer soaking times). The lower end of the austenitizing temperature range should be selected to attain maximum toughness, whilst the top end of the range produces maximum wear and corrosion resistance. For CPM® 420 V we recommend hardening to be carried out in a vacuum or a protective gas. QUENCHING material can be cooled in air, in protective gas, in hot bath or in oil. To achieve maximum toughness salt bath quenching at a temperature of approx. 540 °C, followed by immediate residual quenching in still air down to less than 50 °C is recommended. In the case of heat treat-ment in a vacuum, quenching must be undertaken at a pressure of at least 5 bar down to below 40 °C. TEMPERING Immediately temper after the material has cooled down below 40 °C. CPM® 420 V is normally tempered through two tempering stages, each of 2 hours duration at 200 °C to 400 °C. If required, cooling to sub-zero temperatures can be carried out between the first and the second tem-pering cycle to fully destroy any reaustenitic formation. The first tempering process should always be concluded prior to any sub-zero cooling process.

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-Cross References

12Composition
-Mechanical Properties
8Physical Properties
1Heat Treatment
1Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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