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Aged 200 Maraging Steel vs. Direct Aged Nickel 718

Aged 200 maraging steel belongs to the iron alloys classification, while direct aged nickel 718 belongs to the nickel alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is aged 200 maraging steel and the bottom bar is direct aged nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 9.1
19
Fatigue Strength, MPa 760
760
Fracture Toughness, MPa-m1/2 160
220
Poisson's Ratio 0.3
0.29
Rockwell C Hardness 45
40
Shear Modulus, GPa 74
75
Shear Strength, MPa 890
950
Tensile Strength: Ultimate (UTS), MPa 1500
1530
Tensile Strength: Yield (Proof), MPa 1490
1330

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1460
1340
Melting Onset (Solidus), °C 1420
1260
Specific Heat Capacity, J/kg-K 460
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 31
75
Density, g/cm3 8.2
8.3
Embodied Carbon, kg CO2/kg material 4.5
13
Embodied Energy, MJ/kg 59
190
Embodied Water, L/kg 140
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
280
Resilience: Unit (Modulus of Resilience), kJ/m3 5740
4560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 51
51
Strength to Weight: Bending, points 35
35
Thermal Shock Resistance, points 45
44

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0.2 to 0.8
Boron (B), % 0 to 0.0030
0 to 0.0060
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 0
17 to 21
Cobalt (Co), % 8.0 to 9.0
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 67.8 to 71.8
11.1 to 24.6
Manganese (Mn), % 0 to 0.1
0 to 0.35
Molybdenum (Mo), % 3.0 to 3.5
2.8 to 3.3
Nickel (Ni), % 17 to 19
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Phosphorus (P), % 0 to 0.010
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0.15 to 0.25
0.65 to 1.2
Zirconium (Zr), % 0 to 0.020
0