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EN 1.4408 Stainless Steel vs. EN 1.4031 Stainless Steel

Both EN 1.4408 stainless steel and EN 1.4031 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4408 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
11 to 13
Fatigue Strength, MPa 170
220 to 400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 510
670 to 900
Tensile Strength: Yield (Proof), MPa 210
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 990
770
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
30
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 18
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.7
1.9
Embodied Energy, MJ/kg 52
27
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 26
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 110
380 to 1360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
24 to 32
Strength to Weight: Bending, points 18
22 to 27
Thermal Diffusivity, mm2/s 3.9
8.1
Thermal Shock Resistance, points 11
23 to 32

Alloy Composition

Carbon (C), % 0 to 0.070
0.36 to 0.42
Chromium (Cr), % 18 to 20
12.5 to 14.5
Iron (Fe), % 62.4 to 71
83 to 87.1
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 9.0 to 12
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015