Maraging 250
Description:
Alloy 250/UNS K92890 / Maraging 250/UNS K92940
Alloy 250 (UNS K92890 / Maraging 250) 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.
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 |
Mechanical Properties:
|
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 |
Specifications:
l UNS K92890
l AMS 6512 Bar and Forging Stock
l Werkstoff Nr. 1.6359
l MIL-S-46850
l BS S162
l DTD 5212
l MSRR 6551
l MAT 102
l MIA 101
l Udimar 250
l Vascomax C250
Maraging 250 (Vascomax 250) Applications:
Maraging steel is used for numerous industrial applications, some of which include:
l Missile & rocket motor cases
l Munitions
l Landing gear components
l Aerospace
l Extrusion tooling
l Die casting
l High performance shafting, gears & fasteners