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S31730 Stainless Steel vs. Nickel 718

S31730 stainless steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. They have 55% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
12 to 50
Fatigue Strength, MPa 170
460 to 760
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
75
Shear Strength, MPa 370
660 to 950
Tensile Strength: Ultimate (UTS), MPa 540
930 to 1530
Tensile Strength: Yield (Proof), MPa 200
510 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Mechanical, °C 990
980
Melting Completion (Liquidus), °C 1430
1340
Melting Onset (Solidus), °C 1390
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 24
75
Density, g/cm3 8.0
8.3
Embodied Carbon, kg CO2/kg material 4.6
13
Embodied Energy, MJ/kg 63
190
Embodied Water, L/kg 180
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
140 to 390
Resilience: Unit (Modulus of Resilience), kJ/m3 99
660 to 4560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 19
31 to 51
Strength to Weight: Bending, points 18
25 to 35
Thermal Shock Resistance, points 12
27 to 44

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.8
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17 to 19
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 4.0 to 5.0
0 to 0.3
Iron (Fe), % 52.4 to 61
11.1 to 24.6
Manganese (Mn), % 0 to 2.0
0 to 0.35
Molybdenum (Mo), % 3.0 to 4.0
2.8 to 3.3
Nickel (Ni), % 15 to 16.5
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2