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AISI 309 Stainless Steel vs. EN 1.4031 Stainless Steel

Both AISI 309 stainless steel and EN 1.4031 stainless steel are iron alloys. They have 77% 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 AISI 309 stainless steel and the bottom bar is EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 47
11 to 13
Fatigue Strength, MPa 250 to 280
220 to 400
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
76
Shear Strength, MPa 420 to 470
400 to 540
Tensile Strength: Ultimate (UTS), MPa 600 to 710
670 to 900
Tensile Strength: Yield (Proof), MPa 260 to 350
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 980
770
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 16
30
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 19
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.6
1.9
Embodied Energy, MJ/kg 51
27
Embodied Water, L/kg 170
100

Common Calculations

PREN (Pitting Resistance) 23
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
380 to 1360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
24 to 32
Strength to Weight: Bending, points 20 to 23
22 to 27
Thermal Diffusivity, mm2/s 4.3
8.1
Thermal Shock Resistance, points 14 to 16
23 to 32

Alloy Composition

Carbon (C), % 0 to 0.2
0.36 to 0.42
Chromium (Cr), % 22 to 24
12.5 to 14.5
Iron (Fe), % 58 to 66
83 to 87.1
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015