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S32550 Stainless Steel vs. Nickel 685

S32550 stainless steel belongs to the iron alloys classification, while nickel 685 belongs to the nickel alloys. They have a modest 31% 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 (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 685.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
350
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 21
17
Fatigue Strength, MPa 400
470
Poisson's Ratio 0.27
0.29
Reduction in Area, % 57
20
Shear Modulus, GPa 80
77
Shear Strength, MPa 540
770
Tensile Strength: Ultimate (UTS), MPa 860
1250
Tensile Strength: Yield (Proof), MPa 620
850

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Mechanical, °C 1100
1000
Melting Completion (Liquidus), °C 1440
1380
Melting Onset (Solidus), °C 1390
1330
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 20
75
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 3.8
10
Embodied Energy, MJ/kg 53
140
Embodied Water, L/kg 180
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
190
Resilience: Unit (Modulus of Resilience), kJ/m3 940
1820
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 31
42
Strength to Weight: Bending, points 26
31
Thermal Diffusivity, mm2/s 4.4
3.3
Thermal Shock Resistance, points 23
37

Alloy Composition

Aluminum (Al), % 0
1.2 to 1.6
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0 to 0.040
0.030 to 0.1
Chromium (Cr), % 24 to 27
18 to 21
Cobalt (Co), % 0
12 to 15
Copper (Cu), % 1.5 to 2.5
0 to 0.5
Iron (Fe), % 57.2 to 67
0 to 2.0
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 2.9 to 3.9
3.5 to 5.0
Nickel (Ni), % 4.5 to 6.5
49.6 to 62.5
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
2.8 to 3.3
Zinc (Zn), % 0
0.020 to 0.12