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SAE-AISI 1090 Steel vs. N08801 Stainless Steel

Both SAE-AISI 1090 steel and N08801 stainless steel are iron alloys. They have 46% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1090 steel and the bottom bar is N08801 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
34
Fatigue Strength, MPa 320 to 380
260
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 470 to 570
570
Tensile Strength: Ultimate (UTS), MPa 790 to 950
860
Tensile Strength: Yield (Proof), MPa 520 to 610
190

Thermal Properties

Latent Heat of Fusion, J/g 240
300
Maximum Temperature: Mechanical, °C 400
1090
Melting Completion (Liquidus), °C 1450
1390
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 50
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
30
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.4
5.5
Embodied Energy, MJ/kg 19
79
Embodied Water, L/kg 46
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 91
220
Resilience: Unit (Modulus of Resilience), kJ/m3 730 to 1000
92
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 34
30
Strength to Weight: Bending, points 24 to 27
25
Thermal Diffusivity, mm2/s 13
3.3
Thermal Shock Resistance, points 25 to 31
20

Alloy Composition

Carbon (C), % 0.85 to 1.0
0 to 0.1
Chromium (Cr), % 0
19 to 22
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 98 to 98.6
39.5 to 50.3
Manganese (Mn), % 0.6 to 0.9
0 to 1.5
Nickel (Ni), % 0
30 to 34
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.015
Titanium (Ti), % 0
0.75 to 1.5