ASTM A372 Grade G Steel vs. SAE-AISI 1146 Steel
Both ASTM A372 grade G steel and SAE-AISI 1146 steel are iron alloys. Their average alloy composition is basically identical. 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 ASTM A372 grade G steel and the bottom bar is SAE-AISI 1146 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 280 | |
| 190 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 22 | |
| 13 to 17 |
| Fatigue Strength, MPa | 310 to 380 | |
| 240 to 400 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 410 to 570 | |
| 410 to 440 |
| Tensile Strength: Ultimate (UTS), MPa | 650 to 910 | |
| 670 to 730 |
| Tensile Strength: Yield (Proof), MPa | 430 to 550 | |
| 360 to 630 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 46 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.2 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.4 |
| Embodied Energy, MJ/kg | 20 | |
| 18 |
| Embodied Water, L/kg | 49 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 160 | |
| 93 to 97 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 500 to 810 | |
| 340 to 1050 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 32 | |
| 24 to 26 |
| Strength to Weight: Bending, points | 21 to 27 | |
| 22 to 23 |
| Thermal Diffusivity, mm2/s | 13 | |
| 14 |
| Thermal Shock Resistance, points | 19 to 27 | |
| 20 to 22 |
Alloy Composition
| Carbon (C), % | 0.25 to 0.35 | |
| 0.42 to 0.49 |
| Chromium (Cr), % | 0.4 to 0.65 | |
| 0 |
| Iron (Fe), % | 97.4 to 98.4 | |
| 98.3 to 98.8 |
| Manganese (Mn), % | 0.7 to 1.0 | |
| 0.7 to 1.0 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0.080 to 0.13 |