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AISI 409 Stainless Steel vs. S42010 Stainless Steel

Both AISI 409 stainless steel and S42010 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is AISI 409 stainless steel and the bottom bar is S42010 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 24
18
Fatigue Strength, MPa 140
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Shear Strength, MPa 270
370
Tensile Strength: Ultimate (UTS), MPa 420
590
Tensile Strength: Yield (Proof), MPa 200
350

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 710
800
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
29
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
8.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.2
Embodied Energy, MJ/kg 28
30
Embodied Water, L/kg 94
110

Common Calculations

PREN (Pitting Resistance) 11
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
95
Resilience: Unit (Modulus of Resilience), kJ/m3 100
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
21
Strength to Weight: Bending, points 16
20
Thermal Diffusivity, mm2/s 6.7
7.9
Thermal Shock Resistance, points 15
21

Alloy Composition

Carbon (C), % 0 to 0.080
0.15 to 0.3
Chromium (Cr), % 10.5 to 11.7
13.5 to 15
Iron (Fe), % 84.9 to 89.5
80.9 to 85.6
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.85
Nickel (Ni), % 0 to 0.5
0.35 to 0.85
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.75
0