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SAE-AISI 1008 Steel vs. AISI 308 Stainless Steel

Both SAE-AISI 1008 steel and AISI 308 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1008 steel and the bottom bar is AISI 308 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 93 to 100
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22 to 33
45
Fatigue Strength, MPa 150 to 220
210
Poisson's Ratio 0.29
0.28
Reduction in Area, % 50 to 63
57
Shear Modulus, GPa 73
78
Shear Strength, MPa 220 to 230
410
Tensile Strength: Ultimate (UTS), MPa 330 to 370
590
Tensile Strength: Yield (Proof), MPa 190 to 310
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
990
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 62
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.9
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
17
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.2
Embodied Energy, MJ/kg 18
46
Embodied Water, L/kg 45
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 91
210
Resilience: Unit (Modulus of Resilience), kJ/m3 92 to 260
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 12 to 13
21
Strength to Weight: Bending, points 13 to 15
20
Thermal Diffusivity, mm2/s 17
4.1
Thermal Shock Resistance, points 10 to 12
13

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.080
Chromium (Cr), % 0
19 to 21
Iron (Fe), % 99.31 to 99.7
64.1 to 71
Manganese (Mn), % 0.3 to 0.5
0 to 2.0
Nickel (Ni), % 0
10 to 12
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030