PROPRIETARY VF800-AT Tool steels
Material group:
Ferrous Alloys / Tool steels
Country / Standard:
PROPRIETARY
Data updates
Latest Update: 2015-01
Total number of updates: 1
Update History
This material has 14 properties — only a subset is shown here.
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PROPRIETARY VF800-AT Chemical Composition
CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.8500
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
8.4000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mo
VALUE
2.0000
UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Nb
VALUE
val1
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UNIT
%
CAS NUMBER
7440-03-1
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2
Villares Metals, Product Data Sheet,
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PROPRIETARY VF800-AT Physical Properties
Temperature
Modulus of Elasticity
190 — 210
GPa
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Density
7.72 — 8
kg/dm³
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Poisson Coefficient
0.27 — 0.3
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PROPRIETARY VF800-AT Heat Treatments
- Annealing: soft annealing should be carried out by heating between 870 and 900°C for 2 hours, followed by slow cooling at 10/20°C per hour until 650°C and, then, by air cooling. In this treatment, the use of protective atmosphere is important to avoid surface oxidation and decarburization. Stress relieving: Intense material removal during machining of tools can induce considerable stress, which may cause distortions after end heat treatment. In order to avoid this, a stress reliving is recommended to be applied after machining and before heat treatment. The indicated procedure is slow heating to 500/600°C, holding until complete homogenisation, and cooling (air or furnace) at least down to 200°C. Hardening and Tempering: pre-heating 790 – 830°C, hardening 1020 - 1050°C, tempering 500 - 600ºC. After preheating, tools must be carried to another furnace, holding 30 min after soaking (after tool is fully heated throughout). Quenching may be done in: salt bath at 500/550°C, warm quenching oil, vacuum, with high pressure circulated gas, air blast. Tempering temperatures should be suitable to the required hardness, being always higher than 500°C. Double tempering is required and after each one tools must cool down to room temperature. After soaking, holding time of at least 2h is necessary.
PROPRIETARY VF800-AT Mechanical Properties
Temperature
Brinell Hardness (HB)
≤ 250
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- -Cross References
- 6Composition
- 1Mechanical Properties
- 3Physical Properties
- 1Heat Treatment
- 1Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 2Total Suppliers