ASTM A148 Grade 80-50 vs. ASTM A148 Grade 90-60
Both ASTM A148 grade 80-50 and ASTM A148 grade 90-60 are variants of the same material.
For each property being compared, the top bar is ASTM A148 grade 80-50 and the bottom bar is ASTM A148 grade 90-60.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 | |
| 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 25 | |
| 23 |
| Fatigue Strength, MPa | 280 | |
| 330 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 39 | |
| 45 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 630 | |
| 710 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 420 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 47 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 2.7 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 20 | |
| 20 |
| Embodied Water, L/kg | 48 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
| 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 400 | |
| 580 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 | |
| 25 |
| Strength to Weight: Bending, points | 21 | |
| 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 10 |
| Thermal Shock Resistance, points | 18 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.25 | |
| 0.2 to 0.3 |
| Chromium (Cr), % | 0 | |
| 0.4 to 0.8 |
| Iron (Fe), % | 96.9 to 98.4 | |
| 96.2 to 98.3 |
| Manganese (Mn), % | 1.3 to 1.5 | |
| 0.6 to 0.9 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0.15 to 0.3 |
| Nickel (Ni), % | 0.25 to 0.4 | |
| 0.4 to 0.8 |
| Phosphorus (P), % | 0 to 0.050 | |
| 0 to 0.050 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.060 | |
| 0 to 0.060 |