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Special Metals UDIMET® Alloy 250 Maraging Steel

Category Metal , Ferrous Metal , Maraging Steel
Manufacturer Special Metals (includes the former Inco Alloys International Inc.)
Trade Name UDIMET®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Special Metals UDIMET® Alloy 250 Maraging Steel.pdf
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Material Notes:
A high-strength, maraging steel of iron and nickel with additions of molybdenum and titanium. It has the strength of standard 18Ni (250) maraging steel but the advantages of containing less molybdenum and no cobalt. Used for missile cases, aircraft forgings, power-transmission shafts and couplings, springs, bolts, punches, and dies. Standard product forms are round, flats, forging stock, and wire.Data provided by the manufacturer, Special Metals.
Physical Properties Metric English Comments
Density 7.92 g/cc
0.286 lb/in³
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 1830 MPa
265000 psi
Precipitation Hardened
Tensile Strength, Yield 1750 MPa

@Strain 0.200 %
254000 psi

@Strain 0.200 %
Precipitation Hardened
Elongation at Break 12 %
12 %
Precipitation Hardened
Thermal Properties Metric English Comments
CTE, linear 10.04 µm/m-°C

@Temperature 20.0 - 100 °C
5.578 µin/in-°F

@Temperature 68.0 - 212 °F
Thermal Conductivity 20.3 W/m-K
141 BTU-in/hr-ft²-°F
Melting Point 1435 - 1505 °C
2615 - 2741 °F
Solidus 1435 °C
2615 °F
Liquidus 1505 °C
2741 °F
Component Elements Properties Metric English Comments
Aluminum, Al 0.050 - 0.15 %
0.050 - 0.15 %
Carbon, C <= 0.030 %
<= 0.030 %
Iron, Fe 75 %
75 %
As remainder
Manganese, Mn <= 0.10 %
<= 0.10 %
Molybdenum, Mo 2.75 - 3.25 %
2.75 - 3.25 %
Nickel, Ni 18 - 22 %
18 - 22 %
Phosphorous, P <= 0.010 %
<= 0.010 %
Silicon, Si <= 0.10 %
<= 0.10 %
Sulfur, S <= 0.010 %
<= 0.010 %
Titanium, Ti 1.3 - 1.45 %
1.3 - 1.45 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000489 ohm-cm
0.0000489 ohm-cm
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