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AISI 409 Stainless Steel vs. SAE-AISI 1090 Steel

Both AISI 409 stainless steel and SAE-AISI 1090 steel are iron alloys. They have 88% 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 AISI 409 stainless steel and the bottom bar is SAE-AISI 1090 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 24
11
Fatigue Strength, MPa 140
320 to 380
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Shear Strength, MPa 270
470 to 570
Tensile Strength: Ultimate (UTS), MPa 420
790 to 950
Tensile Strength: Yield (Proof), MPa 200
520 to 610

Thermal Properties

Latent Heat of Fusion, J/g 270
240
Maximum Temperature: Mechanical, °C 710
400
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
50
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 28
19
Embodied Water, L/kg 94
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
82 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 100
730 to 1000
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 15
28 to 34
Strength to Weight: Bending, points 16
24 to 27
Thermal Diffusivity, mm2/s 6.7
13
Thermal Shock Resistance, points 15
25 to 31

Alloy Composition

Carbon (C), % 0 to 0.080
0.85 to 1.0
Chromium (Cr), % 10.5 to 11.7
0
Iron (Fe), % 84.9 to 89.5
98 to 98.6
Manganese (Mn), % 0 to 1.0
0.6 to 0.9
Nickel (Ni), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050
Titanium (Ti), % 0 to 0.75
0