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Nickel 685 vs. Grade 250 Maraging Steel

Nickel 685 belongs to the nickel alloys classification, while grade 250 maraging steel belongs to the iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 nickel 685 and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
7.3 to 17
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 77
75
Shear Strength, MPa 770
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 1250
970 to 1800
Tensile Strength: Yield (Proof), MPa 850
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1380
1480
Melting Onset (Solidus), °C 1330
1430
Specific Heat Capacity, J/kg-K 460
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
32
Density, g/cm3 8.4
8.2
Embodied Carbon, kg CO2/kg material 10
4.9
Embodied Energy, MJ/kg 140
65
Embodied Water, L/kg 340
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
130 to 150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 42
33 to 61
Strength to Weight: Bending, points 31
26 to 40
Thermal Shock Resistance, points 37
29 to 54

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0.050 to 0.15
Boron (B), % 0.0030 to 0.010
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0.030 to 0.1
0 to 0.030
Chromium (Cr), % 18 to 21
0
Cobalt (Co), % 12 to 15
7.0 to 8.5
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 0 to 2.0
66.3 to 71.1
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 3.5 to 5.0
4.6 to 5.2
Nickel (Ni), % 49.6 to 62.5
17 to 19
Phosphorus (P), % 0 to 0.030
0 to 0.010
Silicon (Si), % 0 to 0.75
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 2.8 to 3.3
0.3 to 0.5
Zinc (Zn), % 0.020 to 0.12
0
Zirconium (Zr), % 0
0 to 0.020