SAE-AISI H21 Steel vs. ZA-8
SAE-AISI H21 steel belongs to the iron alloys classification, while ZA-8 belongs to the zinc alloys. There are 21 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI H21 steel and the bottom bar is ZA-8.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 85 to 86 |
| Poisson's Ratio | 0.29 | |
| 0.26 |
| Shear Modulus, GPa | 76 | |
| 34 |
| Tensile Strength: Ultimate (UTS), MPa | 720 to 1790 | |
| 210 to 370 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 110 |
| Melting Completion (Liquidus), °C | 1630 | |
| 400 |
| Melting Onset (Solidus), °C | 1580 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 440 |
| Thermal Conductivity, W/m-K | 27 | |
| 120 |
| Thermal Expansion, µm/m-K | 11 | |
| 23 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 23 | |
| 11 |
| Density, g/cm3 | 8.5 | |
| 6.3 |
| Embodied Carbon, kg CO2/kg material | 4.5 | |
| 3.3 |
| Embodied Energy, MJ/kg | 68 | |
| 62 |
| Embodied Water, L/kg | 72 | |
| 420 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 23 to 58 | |
| 9.3 to 17 |
| Strength to Weight: Bending, points | 21 to 38 | |
| 12 to 18 |
| Thermal Diffusivity, mm2/s | 7.1 | |
| 42 |
| Thermal Shock Resistance, points | 24 to 59 | |
| 7.6 to 13 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 8.0 to 8.8 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0.28 to 0.36 | |
| 0 |
| Chromium (Cr), % | 3.0 to 3.8 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0.8 to 1.3 |
| Iron (Fe), % | 87.6 to 93.8 | |
| 0 to 0.075 |
| Lead (Pb), % | 0 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0 | |
| 0.015 to 0.030 |
| Manganese (Mn), % | 0.15 to 0.4 | |
| 0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 to 0.020 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.5 | |
| 0 to 0.045 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tin (Sn), % | 0 | |
| 0 to 0.0030 |
| Tungsten (W), % | 8.5 to 10 | |
| 0 |
| Vanadium (V), % | 0.3 to 0.6 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 89.7 to 91.2 |