SAE-AISI 1078 Steel vs. SAE-AISI 1095 Steel
Both SAE-AISI 1078 steel and SAE-AISI 1095 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is SAE-AISI 1078 steel and the bottom bar is SAE-AISI 1095 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 220 to 230 | |
200 to 270 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 11 to 14 | |
10 to 11 |
Fatigue Strength, MPa | 270 to 350 | |
310 to 370 |
Poisson's Ratio | 0.29 | |
0.29 |
Reduction in Area, % | 34 to 45 | |
28 to 45 |
Shear Modulus, GPa | 72 | |
72 |
Shear Strength, MPa | 440 to 470 | |
400 to 540 |
Tensile Strength: Ultimate (UTS), MPa | 730 to 780 | |
680 to 900 |
Tensile Strength: Yield (Proof), MPa | 430 to 570 | |
500 to 590 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
240 |
Maximum Temperature: Mechanical, °C | 400 | |
400 |
Melting Completion (Liquidus), °C | 1460 | |
1450 |
Melting Onset (Solidus), °C | 1420 | |
1410 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 49 | |
47 |
Thermal Expansion, µm/m-K | 11 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
9.6 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
11 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 1.8 | |
1.8 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.4 | |
1.4 |
Embodied Energy, MJ/kg | 18 | |
19 |
Embodied Water, L/kg | 45 | |
45 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 90 | |
63 to 84 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 490 to 860 | |
660 to 930 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 26 to 28 | |
24 to 32 |
Strength to Weight: Bending, points | 23 to 24 | |
22 to 26 |
Thermal Diffusivity, mm2/s | 13 | |
13 |
Thermal Shock Resistance, points | 25 to 26 | |
22 to 29 |
Alloy Composition
Carbon (C), % | 0.72 to 0.85 | |
0.9 to 1.0 |
Iron (Fe), % | 98.5 to 99 | |
98.4 to 98.8 |
Manganese (Mn), % | 0.3 to 0.6 | |
0.3 to 0.5 |
Phosphorus (P), % | 0 to 0.040 | |
0 to 0.040 |
Sulfur (S), % | 0 to 0.050 | |
0 to 0.050 |