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AISI 304N Stainless Steel vs. AISI 409 Stainless Steel

Both AISI 304N stainless steel and AISI 409 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 304N stainless steel and the bottom bar is AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 9.1 to 45
24
Fatigue Strength, MPa 220 to 440
140
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 420 to 700
270
Tensile Strength: Ultimate (UTS), MPa 620 to 1180
420
Tensile Strength: Yield (Proof), MPa 270 to 850
200

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 960
710
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
6.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.0
2.0
Embodied Energy, MJ/kg 43
28
Embodied Water, L/kg 150
94

Common Calculations

PREN (Pitting Resistance) 21
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 280
83
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 1830
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 42
15
Strength to Weight: Bending, points 21 to 32
16
Thermal Diffusivity, mm2/s 4.2
6.7
Thermal Shock Resistance, points 14 to 26
15

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 18 to 20
10.5 to 11.7
Iron (Fe), % 66.4 to 73.9
84.9 to 89.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 8.0 to 10.5
0 to 0.5
Nitrogen (N), % 0.1 to 0.16
0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.75