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S32550 Stainless Steel vs. Nickel 718

S32550 stainless steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. They have 46% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S32550 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, % 21
12 to 50
Fatigue Strength, MPa 400
460 to 760
Poisson's Ratio 0.27
0.29
Reduction in Area, % 57
34 to 64
Rockwell C Hardness 28
40
Shear Modulus, GPa 80
75
Shear Strength, MPa 540
660 to 950
Tensile Strength: Ultimate (UTS), MPa 860
930 to 1530
Tensile Strength: Yield (Proof), MPa 620
510 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1440
1340
Melting Onset (Solidus), °C 1390
1260
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 16
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 20
75
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 3.8
13
Embodied Energy, MJ/kg 53
190
Embodied Water, L/kg 180
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
140 to 390
Resilience: Unit (Modulus of Resilience), kJ/m3 940
660 to 4560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 31
31 to 51
Strength to Weight: Bending, points 26
25 to 35
Thermal Diffusivity, mm2/s 4.4
3.0
Thermal Shock Resistance, points 23
27 to 44

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.8
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0 to 0.040
0 to 0.080
Chromium (Cr), % 24 to 27
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 1.5 to 2.5
0 to 0.3
Iron (Fe), % 57.2 to 67
11.1 to 24.6
Manganese (Mn), % 0 to 1.5
0 to 0.35
Molybdenum (Mo), % 2.9 to 3.9
2.8 to 3.3
Nickel (Ni), % 4.5 to 6.5
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Nitrogen (N), % 0.1 to 0.25
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 0.030
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2