ACI-ASTM CD3MCuN Steel vs. ACI-ASTM CD4MCuN Steel
Both ACI-ASTM CD3MCuN steel and ACI-ASTM CD4MCuN steel are iron alloys. Both are furnished in the normalized and tempered condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is ACI-ASTM CD3MCuN steel and the bottom bar is ACI-ASTM CD4MCuN steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 29 | |
| 18 |
| Fatigue Strength, MPa | 370 | |
| 340 |
| Poisson's Ratio | 0.27 | |
| 0.27 |
| Shear Modulus, GPa | 80 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 790 | |
| 770 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 450 | |
| 450 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1420 |
| Melting Onset (Solidus), °C | 1390 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 17 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 20 | |
| 18 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.9 | |
| 3.5 |
| Embodied Energy, MJ/kg | 54 | |
| 49 |
| Embodied Water, L/kg | 180 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 41 | |
| 35 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 620 | |
| 760 |
| Stiffness to Weight: Axial, points | 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 28 |
| Strength to Weight: Bending, points | 24 | |
| 24 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 4.5 |
| Thermal Shock Resistance, points | 22 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.040 |
| Chromium (Cr), % | 24 to 26.7 | |
| 24.5 to 26.5 |
| Copper (Cu), % | 1.4 to 1.9 | |
| 2.7 to 3.3 |
| Iron (Fe), % | 58.2 to 65.9 | |
| 59.5 to 66.3 |
| Manganese (Mn), % | 0 to 1.2 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.9 to 3.8 | |
| 1.7 to 2.3 |
| Nickel (Ni), % | 5.6 to 6.7 | |
| 4.7 to 6.0 |
| Nitrogen (N), % | 0.22 to 0.33 | |
| 0.1 to 0.25 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.1 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.040 |