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S38815 Stainless Steel vs. Nickel 686

S38815 stainless steel belongs to the iron alloys classification, while nickel 686 belongs to the nickel alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S38815 stainless steel and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 34
51
Fatigue Strength, MPa 230
410
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
77
Shear Strength, MPa 410
560
Tensile Strength: Ultimate (UTS), MPa 610
780
Tensile Strength: Yield (Proof), MPa 290
350

Thermal Properties

Latent Heat of Fusion, J/g 370
320
Maximum Temperature: Mechanical, °C 860
980
Melting Completion (Liquidus), °C 1360
1380
Melting Onset (Solidus), °C 1310
1340
Specific Heat Capacity, J/kg-K 500
420
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 19
70
Density, g/cm3 7.5
9.0
Embodied Carbon, kg CO2/kg material 3.8
12
Embodied Energy, MJ/kg 54
170
Embodied Water, L/kg 140
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
320
Resilience: Unit (Modulus of Resilience), kJ/m3 220
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 22
24
Strength to Weight: Bending, points 21
21
Thermal Shock Resistance, points 15
21

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0 to 0.010
Chromium (Cr), % 13 to 15
19 to 23
Copper (Cu), % 0.75 to 1.5
0
Iron (Fe), % 56.1 to 67
0 to 5.0
Manganese (Mn), % 0 to 2.0
0 to 0.75
Molybdenum (Mo), % 0.75 to 1.5
15 to 17
Nickel (Ni), % 13 to 17
49.5 to 63
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 5.5 to 6.5
0 to 0.080
Sulfur (S), % 0 to 0.020
0 to 0.020
Titanium (Ti), % 0
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4