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AISI 431 Stainless Steel vs. 50Cr-50Ni-Cb Alloy

AISI 431 stainless steel belongs to the iron alloys classification, while 50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals. 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 AISI 431 stainless steel and the bottom bar is 50Cr-50Ni-Cb alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 15 to 17
5.6
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
620
Tensile Strength: Yield (Proof), MPa 710 to 1040
390

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
60
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.2
9.2
Embodied Energy, MJ/kg 31
130
Embodied Water, L/kg 120
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
30
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
370
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 50
21
Strength to Weight: Bending, points 27 to 36
20
Thermal Shock Resistance, points 28 to 43
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0 to 0.2
0 to 0.1
Chromium (Cr), % 15 to 17
47 to 52
Iron (Fe), % 78.2 to 83.8
0 to 1.0
Manganese (Mn), % 0 to 1.0
0 to 0.3
Nickel (Ni), % 1.3 to 2.5
43.3 to 51.6
Niobium (Nb), % 0
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