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Grade 250 Maraging Steel vs. Nickel 685

Grade 250 maraging steel belongs to the iron alloys classification, while nickel 685 belongs to the nickel 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 grade 250 maraging steel and the bottom bar is nickel 685.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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