ASTM A227 Spring Steel vs. AWS ENiCu-7
ASTM A227 spring steel belongs to the iron alloys classification, while AWS ENiCu-7 belongs to the nickel alloys. There are 24 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 ASTM A227 spring steel and the bottom bar is AWS ENiCu-7.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 160 |
| Elongation at Break, % | 12 | |
| 34 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 72 | |
| 62 |
| Tensile Strength: Ultimate (UTS), MPa | 1720 to 2220 | |
| 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1270 |
| Melting Onset (Solidus), °C | 1410 | |
| 1230 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 430 |
| Thermal Conductivity, W/m-K | 52 | |
| 21 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 3.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 50 |
| Density, g/cm3 | 7.8 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 8.0 |
| Embodied Energy, MJ/kg | 19 | |
| 110 |
| Embodied Water, L/kg | 46 | |
| 250 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 10 |
| Stiffness to Weight: Bending, points | 24 | |
| 21 |
| Strength to Weight: Axial, points | 61 to 79 | |
| 17 |
| Strength to Weight: Bending, points | 41 to 48 | |
| 17 |
| Thermal Diffusivity, mm2/s | 14 | |
| 5.5 |
| Thermal Shock Resistance, points | 55 to 71 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.75 |
| Carbon (C), % | 0.45 to 0.85 | |
| 0 to 0.1 |
| Copper (Cu), % | 0 | |
| 20.6 to 38 |
| Iron (Fe), % | 97.4 to 99.1 | |
| 0 to 2.5 |
| Manganese (Mn), % | 0.3 to 1.3 | |
| 0 to 4.0 |
| Nickel (Ni), % | 0 | |
| 62 to 69 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.020 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 1.5 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.5 |