ACI-ASTM CN7MS Steel vs. SAE-AISI 1021 Steel
Both ACI-ASTM CN7MS steel and SAE-AISI 1021 steel are iron alloys. They have 50% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is SAE-AISI 1021 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 | |
| 130 to 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 39 | |
| 17 to 27 |
| Fatigue Strength, MPa | 200 | |
| 190 to 300 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 480 to 530 |
| Tensile Strength: Yield (Proof), MPa | 230 | |
| 260 to 450 |
Thermal Properties
| Latent Heat of Fusion, J/g | 340 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 1040 | |
| 400 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1460 |
| Melting Onset (Solidus), °C | 1350 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 12 | |
| 52 |
| Thermal Expansion, µm/m-K | 16 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 28 | |
| 1.8 |
| Density, g/cm3 | 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 1.4 |
| Embodied Energy, MJ/kg | 71 | |
| 18 |
| Embodied Water, L/kg | 180 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 170 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 | |
| 180 to 530 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 19 | |
| 17 to 19 |
| Strength to Weight: Bending, points | 19 | |
| 17 to 18 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 14 |
| Thermal Shock Resistance, points | 13 | |
| 15 to 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0.18 to 0.23 |
| Chromium (Cr), % | 18 to 20 | |
| 0 |
| Copper (Cu), % | 1.5 to 2.0 | |
| 0 |
| Iron (Fe), % | 45.4 to 53.5 | |
| 98.8 to 99.22 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.6 to 0.9 |
| Molybdenum (Mo), % | 2.5 to 3.0 | |
| 0 |
| Nickel (Ni), % | 22 to 25 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 2.5 to 3.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.050 |