ASTM A182 Grade FR vs. ASTM A321 Carbon Steel
Both ASTM A182 grade FR and ASTM A321 carbon steel are iron alloys. They have a very high 97% of their average alloy composition in common.
For each property being compared, the top bar is ASTM A182 grade FR and the bottom bar is ASTM A321 carbon steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 | |
| 190 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 28 | |
| 21 |
| Fatigue Strength, MPa | 270 | |
| 270 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 43 | |
| 39 |
| Shear Modulus, GPa | 72 | |
| 73 |
| Shear Strength, MPa | 320 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 490 | |
| 670 |
| Tensile Strength: Yield (Proof), MPa | 360 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 400 |
| 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 | 52 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 7.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.3 | |
| 1.8 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 1.4 |
| Embodied Energy, MJ/kg | 21 | |
| 18 |
| Embodied Water, L/kg | 52 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 340 | |
| 400 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 17 | |
| 24 |
| Strength to Weight: Bending, points | 17 | |
| 22 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 14 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.55 |
| Copper (Cu), % | 0.75 to 1.3 | |
| 0 |
| Iron (Fe), % | 95.2 to 97.3 | |
| 98.1 to 99.25 |
| Manganese (Mn), % | 0.4 to 1.1 | |
| 0.6 to 0.9 |
| Nickel (Ni), % | 1.6 to 2.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.050 |