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Nickel 685 vs. S30615 Stainless Steel

Nickel 685 belongs to the nickel alloys classification, while S30615 stainless steel belongs to the iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is nickel 685 and the bottom bar is S30615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 350
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
39
Fatigue Strength, MPa 470
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 770
470
Tensile Strength: Ultimate (UTS), MPa 1250
690
Tensile Strength: Yield (Proof), MPa 850
310

Thermal Properties

Latent Heat of Fusion, J/g 320
340
Maximum Temperature: Mechanical, °C 1000
960
Melting Completion (Liquidus), °C 1380
1370
Melting Onset (Solidus), °C 1330
1320
Specific Heat Capacity, J/kg-K 460
500
Thermal Conductivity, W/m-K 13
14
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 75
19
Density, g/cm3 8.4
7.6
Embodied Carbon, kg CO2/kg material 10
3.7
Embodied Energy, MJ/kg 140
53
Embodied Water, L/kg 340
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1820
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 42
25
Strength to Weight: Bending, points 31
23
Thermal Diffusivity, mm2/s 3.3
3.7
Thermal Shock Resistance, points 37
16

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0.8 to 1.5
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.030 to 0.1
0.16 to 0.24
Chromium (Cr), % 18 to 21
17 to 19.5
Cobalt (Co), % 12 to 15
0
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 0 to 2.0
56.7 to 65.3
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 3.5 to 5.0
0
Nickel (Ni), % 49.6 to 62.5
13.5 to 16
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.75
3.2 to 4.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 2.8 to 3.3
0
Zinc (Zn), % 0.020 to 0.12
0