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AISI 409 Stainless Steel vs. EN 1.4931 Steel

Both AISI 409 stainless steel and EN 1.4931 steel are iron alloys. They have a very high 97% 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 EN 1.4931 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 24
17
Fatigue Strength, MPa 140
410
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Tensile Strength: Ultimate (UTS), MPa 420
810
Tensile Strength: Yield (Proof), MPa 200
620

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 710
600
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
24
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
11

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
8.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.9
Embodied Energy, MJ/kg 28
42
Embodied Water, L/kg 94
100

Common Calculations

PREN (Pitting Resistance) 11
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
130
Resilience: Unit (Modulus of Resilience), kJ/m3 100
970
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
29
Strength to Weight: Bending, points 16
25
Thermal Diffusivity, mm2/s 6.7
6.5
Thermal Shock Resistance, points 15
22

Alloy Composition

Carbon (C), % 0 to 0.080
0.2 to 0.26
Chromium (Cr), % 10.5 to 11.7
11.3 to 12.2
Iron (Fe), % 84.9 to 89.5
83.2 to 86.8
Manganese (Mn), % 0 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0
1.0 to 1.2
Nickel (Ni), % 0 to 0.5
0 to 1.0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0 to 0.75
0
Tungsten (W), % 0
0 to 0.5
Vanadium (V), % 0
0.25 to 0.35