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SAE-AISI 1080 Steel vs. SAE-AISI 1008 Steel

Both SAE-AISI 1080 steel and SAE-AISI 1008 steel are iron alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI 1080 steel and the bottom bar is SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 260
93 to 100
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
22 to 33
Fatigue Strength, MPa 300 to 360
150 to 220
Poisson's Ratio 0.29
0.29
Reduction in Area, % 28 to 45
50 to 63
Shear Modulus, GPa 72
73
Shear Strength, MPa 460 to 520
220 to 230
Tensile Strength: Ultimate (UTS), MPa 770 to 870
330 to 370
Tensile Strength: Yield (Proof), MPa 480 to 590
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
62
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.6
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 11
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 46
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 84
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 920
92 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 31
12 to 13
Strength to Weight: Bending, points 24 to 26
13 to 15
Thermal Diffusivity, mm2/s 14
17
Thermal Shock Resistance, points 25 to 29
10 to 12

Alloy Composition

Carbon (C), % 0.75 to 0.88
0 to 0.1
Iron (Fe), % 98.1 to 98.7
99.31 to 99.7
Manganese (Mn), % 0.6 to 0.9
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

Comparable Variants