ASTM A232 Spring Steel vs. SAE-AISI 1021 Steel
Both ASTM A232 spring steel and SAE-AISI 1021 steel are iron alloys. They have a very high 98% 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 ASTM A232 spring steel and the bottom bar is SAE-AISI 1021 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 540 | |
| 130 to 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 17 to 27 |
| Fatigue Strength, MPa | 1040 | |
| 190 to 300 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 46 | |
| 46 to 54 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 1090 | |
| 310 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 1790 | |
| 480 to 530 |
| Tensile Strength: Yield (Proof), MPa | 1610 | |
| 260 to 450 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 52 | |
| 52 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 1.4 |
| Embodied Energy, MJ/kg | 28 | |
| 18 |
| Embodied Water, L/kg | 51 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 | |
| 84 to 110 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 64 | |
| 17 to 19 |
| Strength to Weight: Bending, points | 42 | |
| 17 to 18 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 53 | |
| 15 to 17 |
Alloy Composition
| Carbon (C), % | 0.48 to 0.53 | |
| 0.18 to 0.23 |
| Chromium (Cr), % | 0.8 to 1.1 | |
| 0 |
| Iron (Fe), % | 96.8 to 97.7 | |
| 98.8 to 99.22 |
| Manganese (Mn), % | 0.7 to 0.9 | |
| 0.6 to 0.9 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.050 |
| Vanadium (V), % | 0.15 to 0.3 | |
| 0 |