ASTM A302 Alloy Steel vs. ASTM A372 Grade D Steel
Both ASTM A302 alloy steel and ASTM A372 grade D steel are iron alloys.
For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is ASTM A372 grade D steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 180 to 190 | |
250 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 20 to 23 | |
17 |
Fatigue Strength, MPa | 250 to 280 | |
340 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
73 |
Shear Strength, MPa | 370 to 390 | |
500 |
Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
810 |
Tensile Strength: Yield (Proof), MPa | 350 to 390 | |
510 |
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 | 39 to 51 | |
51 |
Thermal Expansion, µm/m-K | 13 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.4 | |
7.2 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.4 | |
8.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.4 to 3.0 | |
2.1 |
Density, g/cm3 | 7.8 to 7.9 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
1.5 |
Embodied Energy, MJ/kg | 20 to 21 | |
20 |
Embodied Water, L/kg | 48 to 50 | |
48 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
120 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 410 | |
700 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 21 to 22 | |
29 |
Strength to Weight: Bending, points | 20 to 21 | |
25 |
Thermal Diffusivity, mm2/s | 10 to 14 | |
14 |
Thermal Shock Resistance, points | 17 to 18 | |
26 |