ACI-ASTM CA6NM Steel vs. ACI-ASTM CA28MWV Steel
Both ACI-ASTM CA6NM steel and ACI-ASTM CA28MWV steel are iron alloys. Both are furnished in the heat treated (HT) condition. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is ACI-ASTM CA6NM steel and the bottom bar is ACI-ASTM CA28MWV steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 250 | |
| 330 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 17 | |
| 11 |
| Fatigue Strength, MPa | 380 | |
| 470 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Reduction in Area, % | 40 | |
| 27 |
| Shear Modulus, GPa | 76 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 1080 |
| Tensile Strength: Yield (Proof), MPa | 620 | |
| 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 770 | |
| 740 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1470 |
| Melting Onset (Solidus), °C | 1400 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 25 | |
| 25 |
| Thermal Expansion, µm/m-K | 10 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.8 | |
| 4.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.2 | |
| 5.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 11 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.5 | |
| 3.1 |
| Embodied Energy, MJ/kg | 34 | |
| 44 |
| Embodied Water, L/kg | 110 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 15 | |
| 17 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1000 | |
| 1920 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 30 | |
| 38 |
| Strength to Weight: Bending, points | 26 | |
| 30 |
| Thermal Diffusivity, mm2/s | 6.7 | |
| 6.6 |
| Thermal Shock Resistance, points | 31 | |
| 40 |
Alloy Composition
| Carbon (C), % | 0 to 0.060 | |
| 0.2 to 0.28 |
| Chromium (Cr), % | 11.5 to 14 | |
| 11 to 12.5 |
| Iron (Fe), % | 78.4 to 84.6 | |
| 81.4 to 85.8 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.5 to 1.0 |
| Molybdenum (Mo), % | 0.4 to 1.0 | |
| 0.9 to 1.3 |
| Nickel (Ni), % | 3.5 to 4.5 | |
| 0.5 to 1.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 0.9 to 1.3 |
| Vanadium (V), % | 0 | |
| 0.2 to 0.3 |