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AISI 409 Stainless Steel vs. EN 1.4621 Stainless Steel

Both AISI 409 stainless steel and EN 1.4621 stainless steel are iron alloys. They have 89% 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 EN 1.4621 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 24
25
Fatigue Strength, MPa 140
190
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
78
Shear Strength, MPa 270
320
Tensile Strength: Ultimate (UTS), MPa 420
500
Tensile Strength: Yield (Proof), MPa 200
270

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 450
510
Maximum Temperature: Mechanical, °C 710
970
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
21
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
14
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.8
Embodied Energy, MJ/kg 28
41
Embodied Water, L/kg 94
140

Common Calculations

PREN (Pitting Resistance) 11
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
110
Resilience: Unit (Modulus of Resilience), kJ/m3 100
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
18
Strength to Weight: Bending, points 16
18
Thermal Diffusivity, mm2/s 6.7
5.7
Thermal Shock Resistance, points 15
17

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 10.5 to 11.7
20 to 21.5
Copper (Cu), % 0
0.1 to 1.0
Iron (Fe), % 84.9 to 89.5
74.4 to 79.7
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0 to 0.5
0
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.030
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 0.015
Titanium (Ti), % 0 to 0.75
0