SAE-AISI 94B30 Steel vs. ASTM A372 Grade G Steel
Both SAE-AISI 94B30 steel and ASTM A372 grade G steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is SAE-AISI 94B30 steel and the bottom bar is ASTM A372 grade G steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 150 | |
200 to 280 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 25 | |
20 to 22 |
Fatigue Strength, MPa | 220 | |
310 to 380 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
73 |
Shear Strength, MPa | 320 | |
410 to 570 |
Tensile Strength: Ultimate (UTS), MPa | 500 | |
650 to 910 |
Tensile Strength: Yield (Proof), MPa | 300 | |
430 to 550 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
250 |
Maximum Temperature: Mechanical, °C | 410 | |
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 | 39 | |
46 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
7.2 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
8.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.4 | |
2.2 |
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 | 49 | |
49 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
130 to 160 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 250 | |
500 to 810 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 18 | |
23 to 32 |
Strength to Weight: Bending, points | 18 | |
21 to 27 |
Thermal Diffusivity, mm2/s | 10 | |
13 |
Thermal Shock Resistance, points | 15 | |
19 to 27 |
Alloy Composition
Boron (B), % | 0.00050 to 0.0030 | |
0 |
Carbon (C), % | 0.28 to 0.33 | |
0.25 to 0.35 |
Chromium (Cr), % | 0.3 to 0.5 | |
0.4 to 0.65 |
Iron (Fe), % | 97 to 98.1 | |
97.4 to 98.4 |
Manganese (Mn), % | 0.75 to 1.0 | |
0.7 to 1.0 |
Molybdenum (Mo), % | 0.080 to 0.15 | |
0.15 to 0.25 |
Nickel (Ni), % | 0.3 to 0.6 | |
0 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.015 |
Silicon (Si), % | 0.15 to 0.35 | |
0.15 to 0.35 |
Sulfur (S), % | 0 to 0.040 | |
0 to 0.010 |