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Maraging 250 Chemical Composition
| % | C | Si | Mn | P | S | Al | B | Ca | Co | Cr | Mo | Ni | Ti | Zr | Cu | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | – | – | – | – | – | 0.05 | – | – | 7 | – | 4.6 | 17 | 0.3 | – | – | Bal |
| Max | 0.03 | 0.1 | 0.1 | 0.01 | 0.15 | 0.15 | 0.005 | 0.05 | 8.5 | 0.5 | 5.2 | 19 | 0.5 | 0.02 | 0.05 |
Maraging 250 Physical Properties
| Density | Modulus of Elasticity | Average Co of Thermal Expansion |
|---|---|---|
| 8.0 g/cm | 27.0 x 10-6 psi | 5.6 x 10-6 in/in/°F |
Maraging 250 Heat Treatment / Aging:
Maraging alloys are essentially carbon-free, a protective atmosphere is not required during annealing or aging. Material is supplied in the solution annealed condition with a hardness of 30/35 Rc. Typical heat treat time/temperature are listed below. Large cross sections should be aged for longer periods.
NOTE: A modified aging cycle is suggested for die casting applications for increased die life. The following thermal treatments have been used to obtain desirable characteristics for die casters. Following the rough machining of the die, anneal at 1500-1525 ºF for 1 hour per inch of thickness is typical. After finish machining, an aging heat treatment of 980-1000 ºF for 6 hours is typical.
| Temperature | Time | Resulting Hardness |
|---|---|---|
| 900/925 °F | 6 hrs | 48/52 Rc |
Features:
- Ultra-High Strength: Maraging 250 steel (UNS K92890) is an age-hardenable iron-nickel alloy steel with an ultra-high tensile strength of up to 1800 MPa.
- Good Toughness: Despite its high strength, the alloy maintains good toughness, suitable for applications requiring both strength and reliability.
- Ease of Machining: In its pre-aged condition, Maraging 250 steel is readily machinable, facilitating the manufacturing of complex-shaped parts.
- Excellent Transverse Properties: The alloy exhibits excellent transverse properties and resistance to crack propagation, ensuring reliability under various stress conditions.
Applications:
- Oil and Gas Industry: Maraging 250 steel is utilized in the oil and gas sector for manufacturing high-strength, corrosion-resistant equipment components, such as drill rods and pump shafts, to withstand harsh extraction environments.
- Missile and Ejector Systems: Maraging 250 steel is used in manufacturing critical components of missile and ejector systems, such as launchers and propulsion devices, ensuring high strength and reliability.
- Slat Tracks and Drive Shafts: The alloy is suitable for producing slat tracks and drive shafts in aircraft, providing necessary strength and toughness.
