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SAE-AISI 1008 Steel vs. SAE-AISI 1090 Steel

Both SAE-AISI 1008 steel and SAE-AISI 1090 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 1008 steel and the bottom bar is SAE-AISI 1090 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 93 to 100
220 to 280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22 to 33
11
Fatigue Strength, MPa 150 to 220
320 to 380
Poisson's Ratio 0.29
0.29
Reduction in Area, % 50 to 63
28 to 45
Shear Modulus, GPa 73
72
Shear Strength, MPa 220 to 230
470 to 570
Tensile Strength: Ultimate (UTS), MPa 330 to 370
790 to 950
Tensile Strength: Yield (Proof), MPa 190 to 310
520 to 610

Thermal Properties

Latent Heat of Fusion, J/g 250
240
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 62
50
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 7.9
8.2

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 91
82 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 92 to 260
730 to 1000
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 12 to 13
28 to 34
Strength to Weight: Bending, points 13 to 15
24 to 27
Thermal Diffusivity, mm2/s 17
13
Thermal Shock Resistance, points 10 to 12
25 to 31

Alloy Composition

Carbon (C), % 0 to 0.1
0.85 to 1.0
Iron (Fe), % 99.31 to 99.7
98 to 98.6
Manganese (Mn), % 0.3 to 0.5
0.6 to 0.9
Phosphorus (P), % 0 to 0.040
0 to 0.040
Sulfur (S), % 0 to 0.050
0 to 0.050

Comparable Variants