PROPRIETARY CPM Rex M4 HC Structural and constructional steels
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This material has 31 properties — only a subset is shown here.
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PROPRIETARY CPM Rex M4 HC Chemical Composition
Crucible Industries LLC., Product Data Sheets,
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PROPRIETARY CPM Rex M4 HC Physical Properties
Temperature
This material has 31 properties — only a subset is shown here.
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PROPRIETARY CPM Rex M4 HC Heat Treatments
- Forged at 1095-1150°C, slow cool; Annealed: Heat to 870°C, hold 2 hours, slow cool no faster than 15°C per hour to 540°C, then furnace cool or cool in still air to room temperature; Stress relived: Annealed parts: Heat to 595°-700°C, hold 2 hours, then furnace cool or cool in still air. Hardened parts: Heat to 15°C below original tempering temperature, hold 2 hours, then furnace cool or cool in still air. Straightened: Best done warm 200-430°C. Hardened: Preheat: Heat to 820-845°C Equalize. Second pre-heat stage at1010-1040°C suggested for vacuum or atmosphere hardening. Austenitize: 1025-1205°C hold time at temperature: 5-45 minutes. For cutting tools use 1175-1205°C. For cold work applications use 1025-1160°C. Quench: Air or positive pressure quench (2 bar minimum) to below 50°C, or salt or interrupted oil quench to about 540°C, then air cool to below 50°C. A fast quench rate from hardening temperature to below 595°C is critical to achieve optimum heat treat response. A slower cooling rate below 540°C may be used to minimize distortion. Temper: Double temper at 540°C minimum. Triple temper recommended when hardening from 1150°C or higher, 2 hours minimum each temper. Air cool to room temperature between tempers.
PROPRIETARY CPM Rex M4 HC Mechanical Properties
Temperature
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PROPRIETARY CPM Rex M4 HC International Equivalent Materials
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- 1Cross References
- 7Composition
- 5Mechanical Properties
- 15Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
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- -Formability
- -Fatigue
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- -Irradiation
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