EN 1.7725 Steel vs. ACI-ASTM CB7Cu-1 Steel
Both EN 1.7725 steel and ACI-ASTM CB7Cu-1 steel are iron alloys. They have 78% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is ACI-ASTM CB7Cu-1 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 250 to 300 | |
| 300 to 420 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 5.7 to 11 |
| Fatigue Strength, MPa | 390 to 550 | |
| 420 to 590 |
| Impact Strength: V-Notched Charpy, J | 34 to 35 | |
| 34 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 1000 | |
| 960 to 1350 |
| Tensile Strength: Yield (Proof), MPa | 610 to 860 | |
| 760 to 1180 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1430 |
| Melting Onset (Solidus), °C | 1420 | |
| 1500 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 39 | |
| 17 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 2.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 13 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 2.6 |
| Embodied Energy, MJ/kg | 24 | |
| 38 |
| Embodied Water, L/kg | 54 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 2.8 | |
| 17 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 130 | |
| 71 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 980 to 1940 | |
| 1500 to 3590 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 35 | |
| 34 to 48 |
| Strength to Weight: Bending, points | 25 to 28 | |
| 28 to 35 |
| Thermal Diffusivity, mm2/s | 11 | |
| 4.6 |
| Thermal Shock Resistance, points | 24 to 29 | |
| 32 to 45 |
Alloy Composition
| Carbon (C), % | 0.27 to 0.34 | |
| 0 to 0.070 |
| Chromium (Cr), % | 1.3 to 1.7 | |
| 15.5 to 17.7 |
| Copper (Cu), % | 0 | |
| 2.5 to 3.2 |
| Iron (Fe), % | 95.7 to 97.5 | |
| 72.3 to 78.4 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 0 to 0.7 |
| Molybdenum (Mo), % | 0.3 to 0.5 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 3.6 to 4.6 |
| Niobium (Nb), % | 0 | |
| 0 to 0.35 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0.050 to 0.15 | |
| 0 |