PROPRIETARY BÖHLER M300 Tool steels
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PROPRIETARY BÖHLER M300 Chemical Composition
Böhler Edelstahl, Product Data Sheets,
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PROPRIETARY BÖHLER M300 Physical Properties
Temperature
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PROPRIETARY BÖHLER M300 Heat Treatments
- Annealing: 800 to 850°C. Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air. Hardness after annealing: max. 235 HB.
Stress relieving: approx. 650°C. After through heating, hold at temperature in neutral atmosphere for 1 to 2 hours / slow cooling in furnace.
Hardening: 1000 to 1050°C Oil, salt bath (400 to 450°C), air plast or still air. Holding time after temperature equalization: 15 to 30 minutes. Obtainable hardness: 46 - 49 HRC in oil or salt bath, 42 - 48 HRC in air.
Tempering: I - 600 bis 700°C; II - 170 bis 210°C. Slow heating to tempering temperature immediately after hardening/time in furnace 1 hour for each 20 mm of workpiece thickness but at least 2 hours/cooling in air. For average hardness values after tempering please refer to the tempering chart.
Hardness as hardened + tempered condition: II - 46 - 49 HRC / Oil; 42 - 48 HRC / Air.
Forging: 1050 to 850°C. Slow cooling in furnace or thermoinsulating material.
PROPRIETARY BÖHLER M300 Mechanical Properties
Temperature
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PROPRIETARY BÖHLER M300 International Equivalent Materials
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- 57Cross References
- 6Composition
- 71Mechanical Properties
- 18Physical Properties
- 4Heat Treatment
- -Metallography
- -Machinability
- 11Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
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