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50Cr-50Ni-Cb Alloy vs. ASTM A387 Grade 21 Steel

50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is 50Cr-50Ni-Cb alloy and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 5.6
21
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 84
74
Tensile Strength: Ultimate (UTS), MPa 620
500 to 590
Tensile Strength: Yield (Proof), MPa 390
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 350
260
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 60
4.1
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 9.2
1.8
Embodied Energy, MJ/kg 130
23
Embodied Water, L/kg 350
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 370
140 to 320
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
18 to 21
Strength to Weight: Bending, points 20
18 to 20
Thermal Shock Resistance, points 14
14 to 17

Alloy Composition

Aluminum (Al), % 0 to 0.25
0
Carbon (C), % 0 to 0.1
0.050 to 0.15
Chromium (Cr), % 47 to 52
2.8 to 3.3
Iron (Fe), % 0 to 1.0
94.4 to 96
Manganese (Mn), % 0 to 0.3
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 43.3 to 51.6
0
Niobium (Nb), % 1.4 to 1.7
0
Nitrogen (N), % 0 to 0.16
0
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.025
Titanium (Ti), % 0 to 0.5
0