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Nickel 908 vs. S21900 Stainless Steel

Nickel 908 belongs to the nickel alloys classification, while S21900 stainless steel belongs to the iron alloys. They have 52% of their average alloy composition in common. There are 29 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 nickel 908 and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 11
50
Fatigue Strength, MPa 450
380
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 70
78
Shear Strength, MPa 800
510
Tensile Strength: Ultimate (UTS), MPa 1340
710
Tensile Strength: Yield (Proof), MPa 930
390

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Mechanical, °C 920
980
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 11
14
Thermal Expansion, µm/m-K 8.6
17

Otherwise Unclassified Properties

Base Metal Price, % relative 50
15
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 9.3
3.0
Embodied Energy, MJ/kg 140
43
Embodied Water, L/kg 170
160

Common Calculations

PREN (Pitting Resistance) 4.2
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
300
Resilience: Unit (Modulus of Resilience), kJ/m3 2340
380
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 45
26
Strength to Weight: Bending, points 33
23
Thermal Diffusivity, mm2/s 2.9
3.8
Thermal Shock Resistance, points 61
15

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
0
Boron (B), % 0 to 0.012
0
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
19 to 21.5
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 35.6 to 44.6
59.4 to 67.4
Manganese (Mn), % 0 to 1.0
8.0 to 10
Nickel (Ni), % 47 to 51
5.5 to 7.5
Niobium (Nb), % 2.7 to 3.3
0
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.030
Titanium (Ti), % 1.2 to 1.8
0