50Cr-50Ni-Cb (R20501) Casting Alloy
50Cr-50Ni-Cb alloy is a chromium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a very high heat capacity among alloys in the same category. In addition, it has a fairly high tensile strength and a fairly low density.
The graph bars on the material properties cards below compare 50Cr-50Ni-Cb alloy to: chromium alloys (top), all alloys in the same category (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
210 GPa 31 x 106 psi
Elongation at Break
5.6 %
Poisson's Ratio
0.26
Shear Modulus
84 GPa 12 x 106 psi
Tensile Strength: Ultimate (UTS)
620 MPa 89 x 103 psi
Tensile Strength: Yield (Proof)
390 MPa 57 x 103 psi
Thermal Properties
Latent Heat of Fusion
350 J/g
Specific Heat Capacity
480 J/kg-K 0.12 BTU/lb-°F
Thermal Expansion
15 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
60 % relative
Density
8.0 g/cm3 500 lb/ft3
Embodied Carbon
9.2 kg CO2/kg material
Embodied Energy
130 MJ/kg 58 x 103 BTU/lb
Embodied Water
350 L/kg 42 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
30 MJ/m3
Resilience: Unit (Modulus of Resilience)
370 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points
Thermal Shock Resistance
14 points
Alloy Composition
| Cr | 47 to 52 | |
| Ni | 43.3 to 51.6 | |
| Nb | 1.4 to 1.7 | |
| Fe | 0 to 1.0 | |
| Si | 0 to 0.5 | |
| Ti | 0 to 0.5 | |
| Mn | 0 to 0.3 | |
| Al | 0 to 0.25 | |
| N | 0 to 0.16 | |
| C | 0 to 0.1 | |
| P | 0 to 0.020 | |
| S | 0 to 0.020 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A560: Standard Specification for Castings, Chromium-Nickel Alloy
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015