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S17400 Stainless Steel vs. 50Cr-50Ni-Cb Alloy

S17400 stainless steel belongs to the iron alloys classification, while 50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals. They have a modest 21% 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 (15, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is 50Cr-50Ni-Cb alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 11 to 21
5.6
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 75
84
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
620
Tensile Strength: Yield (Proof), MPa 580 to 1250
390

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 11
15

Otherwise Unclassified Properties

Base Metal Price, % relative 14
60
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.7
9.2
Embodied Energy, MJ/kg 39
130
Embodied Water, L/kg 130
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
30
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
370
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 49
21
Strength to Weight: Bending, points 27 to 35
20
Thermal Shock Resistance, points 30 to 46
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0 to 0.070
0 to 0.1
Chromium (Cr), % 15 to 17
47 to 52
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
0 to 1.0
Manganese (Mn), % 0 to 1.0
0 to 0.3
Nickel (Ni), % 3.0 to 5.0
43.3 to 51.6
Niobium (Nb), % 0.15 to 0.45
1.4 to 1.7
Nitrogen (N), % 0
0 to 0.16
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.5