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Nickel 625 vs. S38815 Stainless Steel

Nickel 625 belongs to the nickel alloys classification, while S38815 stainless steel belongs to the iron 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 (8, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 33 to 34
34
Fatigue Strength, MPa 240 to 320
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
74
Shear Strength, MPa 530 to 600
410
Tensile Strength: Ultimate (UTS), MPa 790 to 910
610
Tensile Strength: Yield (Proof), MPa 320 to 450
290

Thermal Properties

Latent Heat of Fusion, J/g 330
370
Maximum Temperature: Mechanical, °C 980
860
Melting Completion (Liquidus), °C 1350
1360
Melting Onset (Solidus), °C 1290
1310
Specific Heat Capacity, J/kg-K 440
500
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 80
19
Density, g/cm3 8.6
7.5
Embodied Carbon, kg CO2/kg material 14
3.8
Embodied Energy, MJ/kg 190
54
Embodied Water, L/kg 290
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
170
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 29
22
Strength to Weight: Bending, points 22 to 24
21
Thermal Shock Resistance, points 22 to 25
15

Alloy Composition

Aluminum (Al), % 0 to 0.4
0 to 0.3
Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 20 to 23
13 to 15
Cobalt (Co), % 0 to 1.0
0
Copper (Cu), % 0
0.75 to 1.5
Iron (Fe), % 0 to 5.0
56.1 to 67
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 8.0 to 10
0.75 to 1.5
Nickel (Ni), % 58 to 68.9
13 to 17
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
5.5 to 6.5
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 0 to 0.4
0