AISI Grade 18Ni (200) Maraging Steel, solution annealed at 815°C (1500°F) for 1 hour, air cooled, aged at 480°C (900°F) for 3 hours

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AISI Grade 18Ni (200) Maraging Steel, solution annealed at 815°C (1500°F) for 1 hour, air cooled, aged at 480°C (900°F) for 3 hours
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
Tensile Strength, Ultimate	840 MPa @Temperature 538 °C	122000 psi @Temperature 1000 °F
	953 MPa @Temperature 510 °C	138000 psi @Temperature 950 °F
	1044 MPa @Temperature 482 °C	151400 psi @Temperature 900 °F
	1154 MPa @Temperature 427 °C	167400 psi @Temperature 800 °F
	1217 MPa @Temperature 316 °C	176500 psi @Temperature 600 °F
Tensile Strength, Yield	743 MPa @Strain 0.2 %, Temperature 538 °C	108000 psi @Strain 0.2 %, Temperature 1000 °F
	876 MPa @Strain 0.2 %, Temperature 510 °C	127000 psi @Strain 0.2 %, Temperature 950 °F
	977 MPa @Strain 0.2 %, Temperature 482 °C	142000 psi @Strain 0.2 %, Temperature 900 °F
	1059 MPa @Strain 0.2 %, Temperature 427 °C	153600 psi @Strain 0.2 %, Temperature 800 °F
	1141 MPa @Strain 0.2 %, Temperature 316 °C	165500 psi @Strain 0.2 %, Temperature 600 °F
Elongation at Break	12.5 % @Temperature 316 °C	12.5 % @Temperature 600 °F	in gage length of 4.5 times the square root of the area
	14 % @Temperature 427 °C	14 % @Temperature 800 °F	in gage length of 4.5 times the square root of the area
	18 % @Temperature 482 °C	18 % @Temperature 900 °F	in gage length of 4.5 times the square root of the area
	18.5 % @Temperature 510 °C	18.5 % @Temperature 950 °F	in gage length of 4.5 times the square root of the area
	24 % @Temperature 538 °C	24 % @Temperature 1000 °F	in gage length of 4.5 times the square root of the area
Reduction of Area	60 % @Temperature 316 °C	60 % @Temperature 600 °F
	61 % @Temperature 427 °C	61 % @Temperature 800 °F
	66.3 % @Temperature 482 °C	66.3 % @Temperature 900 °F
	69.6 % @Temperature 510 °C	69.6 % @Temperature 950 °F
	73.2 % @Temperature 538 °C	73.2 % @Temperature 1000 °F
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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M1820H / 7371

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