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50Cr-50Ni Alloy vs. S81921 Stainless Steel

50Cr-50Ni alloy belongs to the otherwise unclassified metals classification, while S81921 stainless steel belongs to the iron alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is 50Cr-50Ni alloy and the bottom bar is S81921 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 5.7
29
Poisson's Ratio 0.26
0.28
Shear Modulus, GPa 84
79
Tensile Strength: Ultimate (UTS), MPa 620
710
Tensile Strength: Yield (Proof), MPa 390
500

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Specific Heat Capacity, J/kg-K 490
480
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 50
14
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 7.9
2.9
Embodied Energy, MJ/kg 110
41
Embodied Water, L/kg 350
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
180
Resilience: Unit (Modulus of Resilience), kJ/m3 350
630
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
25
Strength to Weight: Bending, points 20
23
Thermal Shock Resistance, points 14
20

Alloy Composition

Aluminum (Al), % 0 to 0.25
0
Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 48 to 52
19 to 22
Iron (Fe), % 0 to 1.0
66.7 to 75.9
Manganese (Mn), % 0 to 0.3
2.0 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 44.5 to 52
2.0 to 4.0
Nitrogen (N), % 0 to 0.3
0.14 to 0.2
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0 to 0.5
0