ACI-ASTM CB7Cu-1 Steel vs. ASTM A387 Grade 12 Steel
Both ACI-ASTM CB7Cu-1 steel and ASTM A387 grade 12 steel are iron alloys. They have 77% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CB7Cu-1 steel and the bottom bar is ASTM A387 grade 12 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 300 to 420 | |
| 140 to 160 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 5.7 to 11 | |
| 25 |
| Fatigue Strength, MPa | 420 to 590 | |
| 190 to 230 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 960 to 1350 | |
| 470 to 520 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1180 | |
| 260 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1470 |
| Melting Onset (Solidus), °C | 1500 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 17 | |
| 44 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.3 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 2.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 1.6 |
| Embodied Energy, MJ/kg | 38 | |
| 21 |
| Embodied Water, L/kg | 130 | |
| 51 |
Common Calculations
| PREN (Pitting Resistance) | 17 | |
| 2.7 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 98 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1500 to 3590 | |
| 180 to 250 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 34 to 48 | |
| 16 to 18 |
| Strength to Weight: Bending, points | 28 to 35 | |
| 17 to 18 |
| Thermal Diffusivity, mm2/s | 4.6 | |
| 12 |
| Thermal Shock Resistance, points | 32 to 45 | |
| 14 to 15 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0.050 to 0.17 |
| Chromium (Cr), % | 15.5 to 17.7 | |
| 0.8 to 1.2 |
| Copper (Cu), % | 2.5 to 3.2 | |
| 0 |
| Iron (Fe), % | 72.3 to 78.4 | |
| 97 to 98.2 |
| Manganese (Mn), % | 0 to 0.7 | |
| 0.4 to 0.65 |
| Molybdenum (Mo), % | 0 | |
| 0.45 to 0.6 |
| Nickel (Ni), % | 3.6 to 4.6 | |
| 0 |
| Niobium (Nb), % | 0 to 0.35 | |
| 0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.4 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |