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Elmet Technologies

AISI Grade 18Ni (300) 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; 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: UNS K93120, ASTM A538 (C), ASTM A579 grade 73, 18Ni300
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Physical PropertiesMetricEnglishComments
Density 8.00 g/cc0.289 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate  1158 MPa
@Temperature 538 °C		168000 psi
@Temperature 1000 °F
 1304 MPa
@Temperature 510 °C		189100 psi
@Temperature 950 °F
 1454 MPa
@Temperature 482 °C		210900 psi
@Temperature 900 °F
 1655 MPa
@Temperature 427 °C		240000 psi
@Temperature 800 °F
 1771 MPa
@Temperature 316 °C		256900 psi
@Temperature 600 °F
Tensile Strength, Yield  1056 MPa
@Strain 0.2 %,
Temperature 538 °C		153200 psi
@Strain 0.2 %,
Temperature 1000 °F
 1192 MPa
@Strain 0.2 %,
Temperature 510 °C		172900 psi
@Strain 0.2 %,
Temperature 950 °F
 1343 MPa
@Strain 0.2 %,
Temperature 482 °C		194800 psi
@Strain 0.2 %,
Temperature 900 °F
 1570 MPa
@Strain 0.2 %,
Temperature 427 °C		228000 psi
@Strain 0.2 %,
Temperature 800 °F
 1693 MPa
@Strain 0.2 %,
Temperature 316 °C		245500 psi
@Strain 0.2 %,
Temperature 600 °F
Elongation at Break  12 %
@Temperature 316 °C		12 %
@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
 17.3 %
@Temperature 482 °C		17.3 %
@Temperature 900 °F		in gage length of 4.5 times the square root of the area
 22 %
@Temperature 510 °C		22 %
@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  61.3 %
@Temperature 427 °C		61.3 %
@Temperature 800 °F
 61.8 %
@Temperature 316 °C		61.8 %
@Temperature 600 °F
 68.4 %
@Temperature 482 °C		68.4 %
@Temperature 900 °F
 76.5 %
@Temperature 510 °C		76.5 %
@Temperature 950 °F
 77.2 %
@Temperature 538 °C		77.2 %
@Temperature 1000 °F
Modulus of Elasticity 190 GPa27600 ksi
Bulk Modulus 160 GPa23200 ksiTypical for steel.
Poissons Ratio 0.300.30Calculated
Shear Modulus 73.0 GPa10600 ksiEstimated from elastic modulus
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000174 ohm-cm0.0000174 ohm-cmTypical steel
 
Thermal PropertiesMetricEnglishComments
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 PropertiesMetricEnglishComments
Aluminum, Al 0.10 %0.10 %
Boron, B <= 0.0030 %<= 0.0030 %
Carbon, C <= 0.030 %<= 0.030 %
Cobalt, Co 9.0 %9.0 %
Iron, Fe 67 %67 %As remainder
Manganese, Mn <= 0.10 %<= 0.10 %
Molybdenum, Mo 4.8 %4.8 %
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 0.60 %0.60 %
Zirconium, Zr 0.010 %0.010 %

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Users viewing this material also viewed the following:
AISI Grade 18Ni (300) Maraging Steel nominal annealed properties
AISI Grade 18Ni (300) Maraging Steel solution treated at 815°C (1500°F) for 15 minutes, air cooled, aged at 480°C (900°F) for 3 hours, 6.35 mm sheet
AISI Grade 18Ni (300) Maraging Steel, Aged, round bar, tested longitudinal, 16 mm
AISI Grade 18Ni (300) Maraging Steel, Aged, sheet, tested transverse, 6 mm
AISI Grade 18Ni (300) Maraging Steel, Aged, round bar, tested longitudinal, 75 mm

M1830A / 7392

Ensinger PEI




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