SAE-AISI 4340M Steel vs. ZA-8
SAE-AISI 4340M steel belongs to the iron alloys classification, while ZA-8 belongs to the zinc alloys. There are 32 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is ZA-8.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 710 | |
| 87 to 100 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 85 to 86 |
| Elongation at Break, % | 6.0 | |
| 1.3 to 8.0 |
| Fatigue Strength, MPa | 690 | |
| 51 to 100 |
| Fracture Toughness, MPa-m1/2 | 60 | |
| 13 |
| Poisson's Ratio | 0.29 | |
| 0.26 |
| Shear Modulus, GPa | 72 | |
| 34 |
| Shear Strength, MPa | 1360 | |
| 240 to 280 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 210 to 370 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 210 to 290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 110 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 100 |
| Melting Completion (Liquidus), °C | 1440 | |
| 400 |
| Melting Onset (Solidus), °C | 1400 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 440 |
| Thermal Conductivity, W/m-K | 38 | |
| 120 |
| Thermal Expansion, µm/m-K | 13 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 28 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 40 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 11 |
| Density, g/cm3 | 7.8 | |
| 6.3 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 3.3 |
| Embodied Energy, MJ/kg | 26 | |
| 62 |
| Embodied Water, L/kg | 55 | |
| 420 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 2.8 to 28 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 260 to 490 |
| Stiffness to Weight: Axial, points | 13 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 84 | |
| 9.3 to 17 |
| Strength to Weight: Bending, points | 51 | |
| 12 to 18 |
| Thermal Diffusivity, mm2/s | 10 | |
| 42 |
| Thermal Shock Resistance, points | 70 | |
| 7.6 to 13 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 8.0 to 8.8 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0.8 to 1.3 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 0 to 0.075 |
| Lead (Pb), % | 0 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0 | |
| 0.015 to 0.030 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 0 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 0 to 0.020 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 0.045 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 |
| Tin (Sn), % | 0 | |
| 0 to 0.0030 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 89.7 to 91.2 |