C47940 Brass vs. ASTM A229 Spring Steel
C47940 brass belongs to the copper alloys classification, while ASTM A229 spring steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is C47940 brass and the bottom bar is ASTM A229 spring steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 190 |
| Elongation at Break, % | 14 to 34 | |
| 14 |
| Poisson's Ratio | 0.31 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 72 |
| Shear Strength, MPa | 250 to 310 | |
| 1020 to 1140 |
| Tensile Strength: Ultimate (UTS), MPa | 380 to 520 | |
| 1690 to 1890 |
| Tensile Strength: Yield (Proof), MPa | 160 to 390 | |
| 1100 to 1230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 170 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 130 | |
| 400 |
| Melting Completion (Liquidus), °C | 850 | |
| 1450 |
| Melting Onset (Solidus), °C | 800 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 470 |
| Thermal Conductivity, W/m-K | 110 | |
| 50 |
| Thermal Expansion, µm/m-K | 20 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 25 | |
| 1.8 |
| Density, g/cm3 | 8.2 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 1.4 |
| Embodied Energy, MJ/kg | 47 | |
| 19 |
| Embodied Water, L/kg | 330 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 68 to 100 | |
| 200 to 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 120 to 740 | |
| 3260 to 4080 |
| Stiffness to Weight: Axial, points | 7.1 | |
| 13 |
| Stiffness to Weight: Bending, points | 19 | |
| 24 |
| Strength to Weight: Axial, points | 13 to 17 | |
| 60 to 67 |
| Strength to Weight: Bending, points | 14 to 17 | |
| 40 to 43 |
| Thermal Diffusivity, mm2/s | 36 | |
| 14 |
| Thermal Shock Resistance, points | 13 to 17 | |
| 54 to 60 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0.55 to 0.85 |
| Copper (Cu), % | 63 to 66 | |
| 0 |
| Iron (Fe), % | 0.1 to 1.0 | |
| 97.5 to 99 |
| Lead (Pb), % | 1.0 to 2.0 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.3 to 1.2 |
| Nickel (Ni), % | 0.1 to 0.5 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 | |
| 0 to 0.050 |
| Tin (Sn), % | 1.2 to 2.0 | |
| 0 |
| Zinc (Zn), % | 28.1 to 34.6 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |