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Nickel 689 vs. Grade 250 Maraging Steel

Nickel 689 belongs to the nickel alloys classification, while grade 250 maraging steel belongs to the iron alloys. They have a modest 34% 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 (8, in this case) are not shown.

For each property being compared, the top bar is nickel 689 and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
7.3 to 17
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 80
75
Shear Strength, MPa 790
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 1250
970 to 1800
Tensile Strength: Yield (Proof), MPa 690
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Melting Completion (Liquidus), °C 1440
1480
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
32
Density, g/cm3 8.5
8.2
Embodied Carbon, kg CO2/kg material 11
4.9
Embodied Energy, MJ/kg 150
65
Embodied Water, L/kg 330
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
130 to 150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 41
33 to 61
Strength to Weight: Bending, points 30
26 to 40
Thermal Shock Resistance, points 35
29 to 54

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
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), % 0.1 to 0.2
0 to 0.030
Chromium (Cr), % 18 to 20
0
Cobalt (Co), % 9.0 to 11
7.0 to 8.5
Iron (Fe), % 0 to 5.0
66.3 to 71.1
Manganese (Mn), % 0 to 0.5
0 to 0.1
Molybdenum (Mo), % 9.0 to 10.5
4.6 to 5.2
Nickel (Ni), % 48.3 to 60.9
17 to 19
Phosphorus (P), % 0 to 0.015
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 2.3 to 2.8
0.3 to 0.5
Zirconium (Zr), % 0
0 to 0.020