ASTM A372 Grade E Steel vs. SAE-AISI 8642 Steel
Both ASTM A372 grade E steel and SAE-AISI 8642 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is ASTM A372 grade E steel and the bottom bar is SAE-AISI 8642 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 200 to 280 | |
170 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 20 to 22 | |
23 |
Fatigue Strength, MPa | 310 to 380 | |
270 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
73 |
Shear Strength, MPa | 410 to 570 | |
370 |
Tensile Strength: Ultimate (UTS), MPa | 650 to 910 | |
580 |
Tensile Strength: Yield (Proof), MPa | 430 to 550 | |
380 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
250 |
Maximum Temperature: Mechanical, °C | 420 | |
410 |
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 | 44 | |
39 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
7.3 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
8.4 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.4 | |
2.6 |
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 | 51 | |
50 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 160 | |
120 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 500 to 810 | |
390 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 23 to 32 | |
20 |
Strength to Weight: Bending, points | 21 to 27 | |
20 |
Thermal Diffusivity, mm2/s | 12 | |
10 |
Thermal Shock Resistance, points | 19 to 27 | |
17 |
Alloy Composition
Carbon (C), % | 0.25 to 0.35 | |
0.4 to 0.45 |
Chromium (Cr), % | 0.8 to 1.2 | |
0.4 to 0.6 |
Iron (Fe), % | 97 to 98.3 | |
96.6 to 97.8 |
Manganese (Mn), % | 0.4 to 0.9 | |
0.75 to 1.0 |
Molybdenum (Mo), % | 0.15 to 0.25 | |
0.15 to 0.25 |
Nickel (Ni), % | 0 | |
0.4 to 0.7 |
Phosphorus (P), % | 0 to 0.015 | |
0 to 0.035 |
Silicon (Si), % | 0.15 to 0.35 | |
0.15 to 0.35 |
Sulfur (S), % | 0 to 0.010 | |
0 to 0.040 |