ASTM A227 Spring Steel vs. C99400 Brass
ASTM A227 spring steel belongs to the iron alloys classification, while C99400 brass belongs to the copper alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is C99400 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 120 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 72 | |
| 44 |
| Tensile Strength: Ultimate (UTS), MPa | 1720 to 2220 | |
| 460 to 550 |
| Tensile Strength: Yield (Proof), MPa | 1430 to 1850 | |
| 230 to 370 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 230 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 200 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1070 |
| Melting Onset (Solidus), °C | 1410 | |
| 1020 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 400 |
| Thermal Expansion, µm/m-K | 12 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 17 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 30 |
| Density, g/cm3 | 7.8 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 2.8 |
| Embodied Energy, MJ/kg | 19 | |
| 45 |
| Embodied Water, L/kg | 46 | |
| 310 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 24 | |
| 19 |
| Strength to Weight: Axial, points | 61 to 79 | |
| 15 to 17 |
| Strength to Weight: Bending, points | 41 to 48 | |
| 15 to 17 |
| Thermal Shock Resistance, points | 55 to 71 | |
| 16 to 19 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0.5 to 2.0 |
| Carbon (C), % | 0.45 to 0.85 | |
| 0 |
| Copper (Cu), % | 0 | |
| 83.5 to 96.5 |
| Iron (Fe), % | 97.4 to 99.1 | |
| 1.0 to 3.0 |
| Lead (Pb), % | 0 | |
| 0 to 0.25 |
| Manganese (Mn), % | 0.3 to 1.3 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 1.0 to 3.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0.5 to 2.0 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0.5 to 5.0 |
| Residuals, % | 0 | |
| 0 to 0.3 |