SAE M50 Structural and constructional steels
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SAE M50 Chemical Composition
SAE J 467b: 1968 / Special Purpose Alloys (ʺSuperalloysʺ)
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SAE M50 Physical Properties
Temperature
This material has 316 properties — only a subset is shown here.
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SAE M50 Heat Treatments
- Air cooled at 551°C.
- Annealing not recommended. Normalizing of M-50 parts should be avoided due to grain growth. Austenitizing temperature: 1093 - 1107°C (2000 - 2025°F). M-50 parts should be preheated to 843°C (1550°F) prior to austenitizing. Hardening quenchant: salt, oil, inert gas. Use 607°C (1125°F) followed by air cool to ambient temperature or air cool directly to ambient temperature. (Marquenching in a nitrate/nitrite salt bath, oil bath, or alternate quenchant operated at a set temperature applicable to the alloys processed is permitted. The parts shall be in the marquenching bath only for sufficient time to stabilize the parts at the bath temperature, but not less than 2 minutes, followed by cooling to approximately ambient temperature. Salt residues shall be removed by a hot water rinse before air tempering).
Tempering: 538 - 552°C (1000 - 1025°F), triple tempering required; double tempering permitted when approved by the cognizant engineering organization.
SAE M50 Mechanical Properties
Temperature
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SAE M50 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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- 101Cross References
- 30Composition
- 23Mechanical Properties
- 11Physical Properties
- 11Heat Treatment
- 4Metallography
- -Machinability
- 1Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- 36Dimensions
- -Tribology
- -Corrosion
- 8Ageing
- -Weatherability
- -Irradiation
- 91Total Suppliers