PROPRIETARY Uddeholm Unimax Tool steels

Material group: Ferrous Alloys / Tool steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2020-02

Total number of updates: 2

Update History

2016-04

This material has 71 properties — only a subset is shown here.

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PROPRIETARY Uddeholm Unimax Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.5

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

5.0

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

0.5

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

Uddeholms AB, Product Data Sheets,

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PROPRIETARY Uddeholm Unimax Physical Properties

Temperature

0 - 30°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 213 GPa

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Density

val1 kg/dm³

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Heat Capacity

val1 J/(kg∙°C)

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Poisson Coefficient

val1

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This material has 71 properties — only a subset is shown here.

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PROPRIETARY Uddeholm Unimax Heat Treatments

Soft annealing:
Protect the steel and heat through to 850°C (1560°F). Then cool in furnace at 11°C (20°F) per hour to 600°C (1110°F), then freely in air.
Stress relieving:
After rough machining the tool should be heated through to 650°C (1200°F), holding time 2 hours. Cool slowly to 500°C (930°F), then freely in air.
Hardening:
Preheating temperature: 600–650°C (1110–1200°F) and 850–900°C (1560–1650°F). Austenitizing temperature: 1000–1025°C (1830–1875°F), normally 1025°C (1875°F). Holding time: 30 minutes
Quenching media:
- High speed gas/circulating atmosphere
- Vacuum furnace (high speed gas with sufficient overpressure)
- Martempering bath, salt bath or fluidized bed at 500–550°C (930–1020°F)
- Martempering bath at 200–350°C (390–660°F)
Note: Temper the tool as soon as its temperature reaches 50–70°C (120–160°F).
Tempering: at least twice with intermittent cooling to room temperature. High temperature tempering >525°C (980°F) is recommended whenever possible.
Nitriding:
- Gas nitriding at 510°C (950°F) for 10 h and depth of 0.15 mm or 30 h and depth of 0.25 mm
- Plasma nitriding at 480°C (895°F) for 10 h and depth of 0.15 mm
Nitrocarburizing:
In gas at 580°C (1075°F) for 150 min and depth of 0.12 mm
In alt bath at 580°C (1075°F) for 1 h and depth of 0.08 mm.
Austenitizing temperature 1025°C (1875°F). Holding time 30 minutes.

PROPRIETARY Uddeholm Unimax Mechanical Properties

Temperature

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

PROPERTY / VALUE

Tensile Strength

2050 — 2334.6 MPa

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Brinell Hardness (HB)

val1

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Elongation, A

val1 %

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Reduction of Area

val1 %

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Rockwell Hardness (HR)

val1

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Yield Strength, Rp0.2

val1 MPa

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-Cross References

6Composition
42Mechanical Properties
12Physical Properties
2Heat Treatment
-Metallography
-Machinability

3Stress-Strain
-Formability
-Fatigue
-Fracture
-Creep

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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