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ASTM A387 Grade 2 Steel vs. 50Cr-50Ni-Cb Alloy

ASTM A387 grade 2 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 (11, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 2 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, % 25
5.6
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 73
84
Tensile Strength: Ultimate (UTS), MPa 470 to 550
620
Tensile Strength: Yield (Proof), MPa 260 to 350
390

Thermal Properties

Latent Heat of Fusion, J/g 250
350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
60
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.6
9.2
Embodied Energy, MJ/kg 20
130
Embodied Water, L/kg 50
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
30
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
370
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
21
Strength to Weight: Bending, points 17 to 19
20
Thermal Shock Resistance, points 14 to 16
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0.050 to 0.21
0 to 0.1
Chromium (Cr), % 0.5 to 0.8
47 to 52
Iron (Fe), % 97.1 to 98.3
0 to 1.0
Manganese (Mn), % 0.55 to 0.8
0 to 0.3
Molybdenum (Mo), % 0.45 to 0.6
0
Nickel (Ni), % 0
43.3 to 51.6
Niobium (Nb), % 0
1.4 to 1.7
Nitrogen (N), % 0
0 to 0.16
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0.15 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.020
Titanium (Ti), % 0
0 to 0.5