PROPRIETARY CarTech No. 882 Tool steels
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PROPRIETARY CarTech No. 882 Chemical Composition
Carpenter Technology Corporation, Product Data Sheets,
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PROPRIETARY CarTech No. 882 Physical Properties
Temperature
This material has 133 properties — only a subset is shown here.
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PROPRIETARY CarTech No. 882 Heat Treatments
- Decarburization: Steel can be hardened without danger of decarburization in controlled atmosphere furnaces using a dew point between 4 and 13°C (40 and 55°F), or from properly rectified neutral salt baths. If not treated in a controlled atmosphere furnace or a salt bath, the steel should be packed in neutral packing compound for hardening.
Normalizing: Normalizing is generally not necessary for this grade. However, in cases where optimum properties are essential, forgings may be heated to 1066°C (1950°F), soaked for one hour per inch of thickness, air cooled, and immediately annealed after the forging has cooled to room temperature. It should be noted that there is some danger of cracking following this procedure; however, it does produce the optimum structure and hence, optimum properties.
Annealing: For annealing, the steel should either be packed in a suitable container, using a neutral packing compound, or placed in a controlled atmosphere furnace. Heat uniformly to 843-871°C (1550-1600°F) and cool very slowly in the furnace at a rate of not more than 11°C (20°F) per hour until the furnace is black. The furnace may then be turned off and allowed to cool naturally. To relieve machining strains for greater accuracy in hardening, first rough machine, then anneal below the critical 649-677°C (1200-1250°F) a minimum of one hour at temperature, and cool very slowly, followed by finish machining.
Hardening: Steel may be air treated or oil treated. For air treating, heat the furnace to 1010-1024°C (1850-1875°F), then place the tool right in the hot furnace near the thermocouple. Endothermic atmospheres should be held to a dew point limit of between +4-13°C (+40-55°F). Let the tool heat naturally until it uniformly matches the color of the thermocouple. Soak 20 minutes plus an additional 5 minutes per inch of thickness and air cool. Neutral salt baths may also be used for heat treatment. When oil treating, follow the same procedures as described above, but drop the temperature to 996-1010°C (1825-1850°F).
Tempering: Double and even triple tempering is suggested to produce optimum mechanical properties, particularly those associated with ductility.
Forging: Heat slowly and uniformly to a temperature of between 1093-1135°C (2000-2075°F) and forge. Do not work the steel below 927°C (1700°F). Reheat as often as necessary. Small simple forgings may be cooled slowly in lime. The best practice for large forgings is to place them in a heated furnace at about 788°C (1450°F), soak uniformly at this temperature, then shut off the heat and cool. This is not an anneal, and when the forging is cooled, it must be annealed.
PROPRIETARY CarTech No. 882 Mechanical Properties
Temperature
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PROPRIETARY CarTech No. 882 International Equivalent Materials
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- 18Cross References
- 7Composition
- 70Mechanical Properties
- 23Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 14Total Suppliers