ASTM B522 Class II vs. ASTM A387 Grade 11 Steel
ASTM B522 class II belongs to the otherwise unclassified metals classification, while ASTM A387 grade 11 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is ASTM B522 class II and the bottom bar is ASTM A387 grade 11 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 96 | |
| 190 |
| Elongation at Break, % | 1.1 to 28 | |
| 25 |
| Poisson's Ratio | 0.41 | |
| 0.29 |
| Shear Modulus, GPa | 34 | |
| 73 |
| Shear Strength, MPa | 180 to 280 | |
| 320 to 390 |
| Tensile Strength: Ultimate (UTS), MPa | 280 to 490 | |
| 500 to 600 |
| Tensile Strength: Yield (Proof), MPa | 120 to 210 | |
| 270 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 77 | |
| 260 |
| Melting Completion (Liquidus), °C | 1030 | |
| 1460 |
| Melting Onset (Solidus), °C | 1030 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 470 |
| Thermal Expansion, µm/m-K | 15 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 11 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 5.7 | |
| 8.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 7.8 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.4 to 63 | |
| 100 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 75 to 230 | |
| 200 to 320 |
| Stiffness to Weight: Axial, points | 3.1 | |
| 13 |
| Stiffness to Weight: Bending, points | 8.9 | |
| 24 |
| Strength to Weight: Axial, points | 4.4 to 7.8 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 5.5 to 8.0 | |
| 18 to 20 |
| Thermal Shock Resistance, points | 13 to 24 | |
| 15 to 18 |
Alloy Composition
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| Carbon (C), % | 0 | |
| 0.050 to 0.17 |
| Chromium (Cr), % | 0 | |
| 1.0 to 1.5 |
| Gold (Au), % | 68.5 to 69.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 96.2 to 97.6 |
| Manganese (Mn), % | 0 | |
| 0.4 to 0.65 |
| Molybdenum (Mo), % | 0 | |
| 0.45 to 0.65 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Platinum (Pt), % | 5.5 to 6.5 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0.5 to 0.8 |
| Silver (Ag), % | 24.5 to 25.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.025 |
| Residuals, % | 0 to 0.26 | |
| 0 |