AISI Grade 18Ni (200) Maraging Steel, Aged, 75 mm round bar, tested in longitudinal direction

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AISI Grade 18Ni (200) Maraging Steel, Aged, 75 mm round bar, tested in longitudinal direction
Categories:	Metal; Ferrous Metal; Alloy Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel; Maraging Steel
Material Notes:	Applications: Bearings, Belleville springs, bolts, cannon recoil springs, rocket motor and missiles cases, couplings, load cells, flexures for guidance mechanisms of missiles, helicopter drive shafts, transmission shafts, fan shafts in commercial jet engines, aircraft wing components and forgings, aluminum die casting dies, cold forming dies, plastic molding dies, cores, pins, punches, and trim knees.
Key Words:	maraging steels, UNS K92810, ASTM A538 (A), ASTM A579 grade 71
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Physical Properties	Metric	English	Comments

Density	8.00 g/cc	0.289 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	491	491	estimated, based on comparison with similar maraging steels.
Hardness, Knoop	544	544	estimated, based on comparison with similar maraging steels.
Hardness, Rockwell C	50	50	estimated, based on comparison with similar maraging steels.
Hardness, Vickers	523	523	estimated, based on comparison with similar maraging steels.
Tensile Strength, Ultimate	1750 MPa	254000 psi
Tensile Strength, Yield	1710 MPa	248000 psi	estimated, based on comparison with similar maraging steels.
Elongation at Break	11 %	11 %	estimated, based on comparison with similar maraging steels.
Reduction of Area	53 %	53 %	estimated, based on comparison with similar maraging steels.
Modulus of Elasticity	183 GPa	26500 ksi
Bulk Modulus	160 GPa	23200 ksi	Typical for steel
Poissons Ratio	0.30	0.30	Calculated
Shear Modulus	70.0 GPa	10200 ksi	Estimated from elastic modulus

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000174 ohm-cm	0.0000174 ohm-cm	Typical steel

Thermal Properties	Metric	English	Comments
CTE, linear	10.1 µm/m-°C @Temperature 21.0 - 480 °C	5.61 µin/in-°F @Temperature 69.8 - 896 °F
Thermal Conductivity	25.3 W/m-K @Temperature 20.0 °C	176 BTU-in/hr-ft²-°F @Temperature 68.0 °F
	25.8 W/m-K @Temperature 50.0 °C	179 BTU-in/hr-ft²-°F @Temperature 122 °F
	27.0 W/m-K @Temperature 100 °C	187 BTU-in/hr-ft²-°F @Temperature 212 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	0.10 %	0.10 %
Boron, B	0.0030 %	0.0030 %
Carbon, C	<= 0.030 %	<= 0.030 %
Cobalt, Co	8.5 %	8.5 %
Iron, Fe	69 %	69 %	As remainder
Manganese, Mn	<= 0.10 %	<= 0.10 %
Molybdenum, Mo	3.25 %	3.25 %
Nickel, Ni	18.5 %	18.5 %
Phosphorus, P	<= 0.010 %	<= 0.010 %
Silicon, Si	<= 0.10 %	<= 0.10 %
Sulfur, S	<= 0.010 %	<= 0.010 %
Titanium, Ti	0.20 %	0.20 %
Zirconium, Zr	0.010 %	0.010 %

References for this datasheet.

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M1820D / 7367

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