SAE-AISI 1008 Steel vs. SAE-AISI 1108 Steel
Both SAE-AISI 1008 steel and SAE-AISI 1108 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is SAE-AISI 1008 steel and the bottom bar is SAE-AISI 1108 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 93 to 100 | |
110 to 140 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 22 to 33 | |
23 to 34 |
Fatigue Strength, MPa | 150 to 220 | |
170 to 260 |
Poisson's Ratio | 0.29 | |
0.29 |
Reduction in Area, % | 50 to 63 | |
45 to 57 |
Shear Modulus, GPa | 73 | |
73 |
Shear Strength, MPa | 220 to 230 | |
250 to 280 |
Tensile Strength: Ultimate (UTS), MPa | 330 to 370 | |
380 to 440 |
Tensile Strength: Yield (Proof), MPa | 190 to 310 | |
220 to 360 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
250 |
Maximum Temperature: Mechanical, °C | 400 | |
400 |
Melting Completion (Liquidus), °C | 1470 | |
1460 |
Melting Onset (Solidus), °C | 1430 | |
1420 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 62 | |
52 |
Thermal Expansion, µm/m-K | 12 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 6.9 | |
7.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 7.9 | |
8.0 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 1.8 | |
1.8 |
Density, g/cm3 | 7.9 | |
7.9 |
Embodied Carbon, kg CO2/kg material | 1.4 | |
1.4 |
Embodied Energy, MJ/kg | 18 | |
18 |
Embodied Water, L/kg | 45 | |
46 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 78 to 91 | |
95 to 110 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 92 to 260 | |
130 to 340 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 12 to 13 | |
13 to 16 |
Strength to Weight: Bending, points | 13 to 15 | |
15 to 16 |
Thermal Diffusivity, mm2/s | 17 | |
14 |
Thermal Shock Resistance, points | 10 to 12 | |
12 to 14 |
Alloy Composition
Carbon (C), % | 0 to 0.1 | |
0.080 to 0.13 |
Iron (Fe), % | 99.31 to 99.7 | |
98.9 to 99.24 |
Manganese (Mn), % | 0.3 to 0.5 | |
0.6 to 0.8 |
Phosphorus (P), % | 0 to 0.040 | |
0 to 0.040 |
Sulfur (S), % | 0 to 0.050 | |
0.080 to 0.13 |