PROPRIETARY Böhler Uddeholm A2 Tool steels
Material group:
Ferrous Alloys / Tool steels
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PROPRIETARY
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Latest Update: 2017-07
Total number of updates: 1
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This material has 23 properties — only a subset is shown here.
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PROPRIETARY Böhler Uddeholm A2 Physical Properties
Temperature
Modulus of Elasticity
190 — 210
GPa
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Thermal Conductivity
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Density
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Heat Capacity
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Poisson Coefficient
val1
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PROPRIETARY Böhler Uddeholm A2 Heat Treatments
- Soft annealing: Protect the steel and heat through to 850°C. Then cool in the furnace at 10°C per hr to 650°C, then freely in air.
Stress relieving: After rough machining the tool should be heated through to 650°C, holding time 2 hr. Cool slowly to 500°C, then freely in air.
Hardening: Preheating temperature: 650-750°C. Austenitizing temperature: 925-970°C, but usually 940-960°C.
Hardness before tempering approx. 63 HRC (at 990°C, soaking time 60 min.);
Hardness before tempering approx. 64 HRC (at 1010°C, soaking time 45 min.);
Hardness before tempering approx. 65 HRC (at 1030°C, soaking time 30 min.)
*Soaking time-time at hardening temperature after the tool is fully heated through. Protect the part against decarburization and oxidation during hardening.
Quenching media: Martempering bath or fluidized bed at 180-220°C or 450-550°C then cool in air; Circulating air or atmosphere; Vacuum furnace with overpressure of gas at cooling; Oil (only for small and uncomplicated tools). Hardness as a function of hardening temperature.
Tempering: Choose the tempering temperature according to the hardness required by reference to the tempering graph. Temper twice with intermediate cooling to room temperature. Lowest recommended tempering temperature 250°C. Holding time at temperature minimum 2 hr. The tempering graphs are valid for small samples. The hardness received is also dependent on the tool size samples.
PROPRIETARY Böhler Uddeholm A2 Mechanical Properties
Temperature
Compression Yield Strength
1350 — 2200
MPa
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- -Cross References
- -Composition
- 4Mechanical Properties
- 14Physical Properties
- 4Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
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