MIL 4140 Structural and constructional steels
Data updates
This material has 273 properties — only a subset is shown here.
Unlock full material properties, including detailed values across temperatures and conditions.
Free registration required • Instant access
MIL 4140 Chemical Composition
MIL-S-5626C: 1968 / Steel, chrome-molybdenum (4140) bars, rods, and forging stock (for aircraft application)
Looking for full material performance data?
Free registration required • Instant access
MIL 4140 Physical Properties
Temperature
This material has 273 properties — only a subset is shown here.
Unlock detailed physical values across temperatures and conditions.
Free registration required • Instant access
MIL 4140 Heat Treatments
- Normalizing temperature range 1600-1700°F, air quenched; Annealing temperature range 1525-1575°F; Furnace cool to 1000°F or below; (Recommended subcritical anneal temperature is 1250°F); Austenitizing temperature range 1550-1600°F; Medium for quenching: oil, polymer.
MIL 4140 Mechanical Properties
Temperature
Need complete mechanical properties to make the right choice?
Get complete data on strength, hardness, fatigue, and more.
Free registration required • Instant access
MIL 4140 International Equivalent Materials
Showing 15 of 139 results.
Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
Need the full list of 139 international equivalents?
See all 139 equivalent grades with detailed mapping by standard, producer and equivalence category.
Free registration required • Instant access
Optimize material selection for your application - Book A Demo
- 139Cross References
- 9Composition
- 8Mechanical Properties
- 3Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 113Total Suppliers