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Nickel 825 vs. S21900 Stainless Steel

Nickel 825 belongs to the nickel alloys classification, while S21900 stainless steel belongs to the iron alloys. They have 57% of their average alloy composition in common. There are 31 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 825 and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
50
Fatigue Strength, MPa 190
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Shear Strength, MPa 430
510
Tensile Strength: Ultimate (UTS), MPa 650
710
Tensile Strength: Yield (Proof), MPa 260
390

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Mechanical, °C 980
980
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 11
14
Thermal Expansion, µm/m-K 14
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 41
15
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 7.2
3.0
Embodied Energy, MJ/kg 100
43
Embodied Water, L/kg 230
160

Common Calculations

PREN (Pitting Resistance) 31
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
300
Resilience: Unit (Modulus of Resilience), kJ/m3 170
380
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
26
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 2.9
3.8
Thermal Shock Resistance, points 17
15

Alloy Composition

Aluminum (Al), % 0 to 0.2
0
Carbon (C), % 0 to 0.050
0 to 0.080
Chromium (Cr), % 19.5 to 23.5
19 to 21.5
Copper (Cu), % 1.5 to 3.0
0
Iron (Fe), % 22 to 37.9
59.4 to 67.4
Manganese (Mn), % 0 to 1.0
8.0 to 10
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 38 to 46
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.050
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.6 to 1.2
0