About Alloy
Alloy 250/UNS K92890 / Maraging 250/UNS K92940 is an age-hardenable iron-nickel steel. Alloy 250 combines ultra-high strength (1800MPa), good toughness, readily machinable in pre-aged condition, excellent transverse properties and resistance to crack propagation.
Maraging 250 (also referred to as Maraging C250 and Vascomax 250) is a vacuum induction melted and vacuum arc melted, low-carbon, nickel-cobalt-molybdenum high temperature alloy. This maraging steel can attain yield strengths in excess of 240 ksi (1655 MPa) through a simple, low temperature heat treatment. Maraging 250 exhibits good ductility at high strength levels and is readily welded.
Product Form
Bar, Tube, Forgings: AMS 6512
Sheet, Strip and Plate:AMS 6520
Chemical Composition
| Iron, Fe | 68 |
| Nickel, Ni | 18.5 |
| Cobalt, Co | 7.5 |
| Molybdenum, Mo | 4.8 |
| Titanium, Ti | 0.4 |
| Aluminum, Al | 0.1 |
| Silicon, Si | ≤ 0.10 |
| Manganese, Mn | ≤ 0.10 |
| Carbon, C | ≤ 0.030 |
| Phosphorous, P | ≤ 0.010 |
| Sulfur, S | ≤ 0.010 |
| Zirconium, Zr | 0.01 |
| Boron, B | 0.003 |
Property
| Material | Condition | Ultimate Tensile (min) | Yield Strength (Min) | Elongation in 4D % (min) | Hardness | ||
| Mpa | Ksi | Mpa | Ksi | ||||
| Alloy Maraging C250 | After Maraging heat treatment 900°F | 1758 | 255 | 1724 | 250 | 6 | ≥ 48 HRC |
Application
Maraging steel is used for numerous industrial applications, some of which include:
Missile & rocket motor cases
Munitions
Landing gear components
Aerospace
Extrusion tooling
Die casting
High performance shafting, gears & fasteners
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