ASTM Grade LCB Steel vs. ASTM Grade LCA Steel
Both ASTM grade LCB steel and ASTM grade LCA steel are iron alloys. Both are furnished in the normalized and tempered condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is ASTM grade LCB steel and the bottom bar is ASTM grade LCA steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 27 | |
| 27 |
| Fatigue Strength, MPa | 200 | |
| 170 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 40 | |
| 40 |
| Shear Modulus, GPa | 72 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 500 |
| Tensile Strength: Yield (Proof), MPa | 270 | |
| 230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 400 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 51 | |
| 49 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 1.9 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 18 | |
| 19 |
| Embodied Water, L/kg | 45 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 200 | |
| 150 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 19 | |
| 18 |
| Strength to Weight: Bending, points | 19 | |
| 18 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 17 | |
| 16 |
Alloy Composition
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| Carbon (C), % | 0 to 0.3 | |
| 0 to 0.25 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 97 to 100 | |
| 96.9 to 100 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.7 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.045 | |
| 0 to 0.045 |
| Residuals, % | 0 to 1.0 | |
| 0 to 1.0 |