ACI-ASTM CB7Cu-2 Steel vs. AISI 309 Stainless Steel
Both ACI-ASTM CB7Cu-2 steel and AISI 309 stainless steel are iron alloys. They have 83% of their average alloy composition in common. 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 ACI-ASTM CB7Cu-2 steel and the bottom bar is AISI 309 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 300 to 420 | |
| 180 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 5.7 to 11 | |
| 34 to 47 |
| Fatigue Strength, MPa | 420 to 590 | |
| 250 to 280 |
| Poisson's Ratio | 0.28 | |
| 0.27 |
| Shear Modulus, GPa | 75 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 960 to 1350 | |
| 600 to 710 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1180 | |
| 260 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1450 |
| Melting Onset (Solidus), °C | 1380 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 17 | |
| 16 |
| Thermal Expansion, µm/m-K | 11 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.1 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.4 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 19 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 3.6 |
| Embodied Energy, MJ/kg | 38 | |
| 51 |
| Embodied Water, L/kg | 130 | |
| 170 |
Common Calculations
| PREN (Pitting Resistance) | 15 | |
| 23 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 200 to 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1510 to 3600 | |
| 170 to 310 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 34 to 48 | |
| 21 to 25 |
| Strength to Weight: Bending, points | 28 to 35 | |
| 20 to 23 |
| Thermal Diffusivity, mm2/s | 4.6 | |
| 4.3 |
| Thermal Shock Resistance, points | 32 to 45 | |
| 14 to 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.2 |
| Chromium (Cr), % | 14 to 15.5 | |
| 22 to 24 |
| Copper (Cu), % | 2.5 to 3.2 | |
| 0 |
| Iron (Fe), % | 73.6 to 79 | |
| 58 to 66 |
| Manganese (Mn), % | 0 to 0.7 | |
| 0 to 2.0 |
| Nickel (Ni), % | 4.5 to 5.5 | |
| 12 to 15 |
| Niobium (Nb), % | 0 to 0.35 | |
| 0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |