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EN 1.4404 Stainless Steel vs. AISI 409 Stainless Steel

Both EN 1.4404 stainless steel and AISI 409 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4404 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, % 14 to 43
24
Fatigue Strength, MPa 220 to 320
140
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Shear Strength, MPa 420 to 550
270
Tensile Strength: Ultimate (UTS), MPa 600 to 900
420
Tensile Strength: Yield (Proof), MPa 240 to 570
200

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 950
710
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
6.5
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.8
2.0
Embodied Energy, MJ/kg 52
28
Embodied Water, L/kg 150
94

Common Calculations

PREN (Pitting Resistance) 26
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 210
83
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 32
15
Strength to Weight: Bending, points 20 to 26
16
Thermal Diffusivity, mm2/s 4.0
6.7
Thermal Shock Resistance, points 13 to 20
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 16.5 to 18.5
10.5 to 11.7
Iron (Fe), % 62.8 to 71.5
84.9 to 89.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 13
0 to 0.5
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.75