PROPRIETARY Unisteel 4140 Structural and constructional steels
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PROPRIETARY Unisteel 4140 Chemical Composition
Ellwood Specialty Steel, Product Data Sheets,
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PROPRIETARY Unisteel 4140 Physical Properties
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PROPRIETARY Unisteel 4140 Heat Treatments
- Hardened by heating to 1550 F and quenching in oil. It is best to normalize the alloy by heating at 1675 F for a long enough time to permit thorough heating, followed by air cooling, prior to the hardening treatment.
Forging: May be forged at 2200 °F down to 1700 °F.
Hot working: If required, may be done in the range of 1900 °F to 1500 °F.
Annealing: Is done at 1600 °F followed by slow furnace cooling.
Tempering temperatures range from 400 °F to 1200 °F depending upon the hardness level desired. The lower the tempering temperature the greater the hardness of the alloy. For example tempering at 600 °F gives a tensile strength of 225 ksi while tempering at 1000 °F will give 130 ksi.
PROPRIETARY Unisteel 4140 International Equivalent Materials
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Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
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- 224Cross References
- 8Composition
- -Mechanical Properties
- 5Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
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