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S40977 Stainless Steel vs. Nickel 718

S40977 stainless steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 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 S40977 stainless steel and the bottom bar is nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
12 to 50
Fatigue Strength, MPa 200
460 to 760
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
75
Shear Strength, MPa 320
660 to 950
Tensile Strength: Ultimate (UTS), MPa 510
930 to 1530
Tensile Strength: Yield (Proof), MPa 310
510 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Mechanical, °C 720
980
Melting Completion (Liquidus), °C 1440
1340
Melting Onset (Solidus), °C 1400
1260
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 25
11
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
75
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 1.9
13
Embodied Energy, MJ/kg 27
190
Embodied Water, L/kg 97
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
140 to 390
Resilience: Unit (Modulus of Resilience), kJ/m3 250
660 to 4560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 18
31 to 51
Strength to Weight: Bending, points 18
25 to 35
Thermal Diffusivity, mm2/s 6.7
3.0
Thermal Shock Resistance, points 18
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), % 10.5 to 12.5
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 83.9 to 89.2
11.1 to 24.6
Manganese (Mn), % 0 to 1.5
0 to 0.35
Molybdenum (Mo), % 0
2.8 to 3.3
Nickel (Ni), % 0.3 to 1.0
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Nitrogen (N), % 0 to 0.030
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 0.015
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2