AISI 431 Stainless Steel vs. C72800 Copper-nickel
AISI 431 stainless steel belongs to the iron alloys classification, while C72800 copper-nickel belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is C72800 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 120 |
| Elongation at Break, % | 15 to 17 | |
| 3.9 to 23 |
| Poisson's Ratio | 0.28 | |
| 0.34 |
| Rockwell C Hardness | 26 | |
| 21 to 40 |
| Shear Modulus, GPa | 77 | |
| 44 |
| Shear Strength, MPa | 550 to 840 | |
| 330 to 740 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1380 | |
| 520 to 1270 |
| Tensile Strength: Yield (Proof), MPa | 710 to 1040 | |
| 250 to 1210 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 210 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 200 |
| Melting Completion (Liquidus), °C | 1510 | |
| 1080 |
| Melting Onset (Solidus), °C | 1450 | |
| 920 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 380 |
| Thermal Conductivity, W/m-K | 26 | |
| 55 |
| Thermal Expansion, µm/m-K | 12 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.6 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 38 |
| Density, g/cm3 | 7.7 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 4.4 |
| Embodied Energy, MJ/kg | 31 | |
| 68 |
| Embodied Water, L/kg | 120 | |
| 360 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 180 | |
| 37 to 99 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1270 to 2770 | |
| 260 to 5650 |
| Stiffness to Weight: Axial, points | 14 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 25 | |
| 19 |
| Strength to Weight: Axial, points | 32 to 50 | |
| 17 to 40 |
| Strength to Weight: Bending, points | 27 to 36 | |
| 16 to 30 |
| Thermal Diffusivity, mm2/s | 7.0 | |
| 17 |
| Thermal Shock Resistance, points | 28 to 43 | |
| 19 to 45 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.1 |
| Antimony (Sb), % | 0 | |
| 0 to 0.020 |
| Bismuth (Bi), % | 0 | |
| 0 to 0.0010 |
| Boron (B), % | 0 | |
| 0 to 0.0010 |
| Carbon (C), % | 0 to 0.2 | |
| 0 |
| Chromium (Cr), % | 15 to 17 | |
| 0 |
| Copper (Cu), % | 0 | |
| 78.3 to 82.8 |
| Iron (Fe), % | 78.2 to 83.8 | |
| 0 to 0.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.0050 |
| Magnesium (Mg), % | 0 | |
| 0.0050 to 0.15 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.050 to 0.3 |
| Nickel (Ni), % | 1.3 to 2.5 | |
| 9.5 to 10.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.0050 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.050 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.0025 |
| Tin (Sn), % | 0 | |
| 7.5 to 8.5 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Zinc (Zn), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.3 |