NBN 31 CrMo 12 Structural and constructional steels
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NBN 31 CrMo 12 Chemical Composition
NBN 253-04 / Nitriding steels - Grades and types
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NBN 31 CrMo 12 Physical Properties
Temperature
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NBN 31 CrMo 12 Heat Treatments
- Soft annealing: 650-700°C; Hardening: 870-930°C (0,5 h minimum), oil or water cooling; Tempering: 580-700°C (1 h minimum); Nitriding: 480-570°C.
- The base composition and the heat treatment (quenching and tempering) prior to nitriding both have an influence on the results of nitriding treatment. The tempering temperature should not be less than 50°C higher than the nitriding temperature. A difference of less than 50°C should be the subject of a special agreement.
Soft annealing at 650-700°C;
Hardening at 870-930°C (time for austenitizing as a guide: 0.5h minimum) and quenching in oil or water;
Tempering at 580-700°C (time for tempering as a guide: 1h minimum; With very large sizes, the tempering temperature may be agreed at the time of enquiry and order).;
Nitriding at 490-570°C (time for nitriding depends on the desired depth of the nitrided case).
NBN 31 CrMo 12 Mechanical Properties
Temperature
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NBN 31 CrMo 12 International Equivalent Materials
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- 188Cross References
- 23Composition
- 40Mechanical Properties
- 4Physical Properties
- 8Heat Treatment
- 4Metallography
- -Machinability
- -Stress-Strain
- -Formability
- 5Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 128Total Suppliers