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EN 1.4404 Stainless Steel vs. S31266 Stainless Steel

Both EN 1.4404 stainless steel and S31266 stainless steel are iron alloys. They have 73% of their average alloy composition in common. There are 32 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 1.4404 stainless steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 14 to 43
40
Fatigue Strength, MPa 220 to 320
400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
81
Shear Strength, MPa 420 to 550
590
Tensile Strength: Ultimate (UTS), MPa 600 to 900
860
Tensile Strength: Yield (Proof), MPa 240 to 570
470

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 950
1100
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 19
37
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 3.8
6.5
Embodied Energy, MJ/kg 52
89
Embodied Water, L/kg 150
220

Common Calculations

PREN (Pitting Resistance) 26
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 210
290
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 32
29
Strength to Weight: Bending, points 20 to 26
24
Thermal Diffusivity, mm2/s 4.0
3.1
Thermal Shock Resistance, points 13 to 20
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 16.5 to 18.5
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 62.8 to 71.5
34.1 to 46
Manganese (Mn), % 0 to 2.0
2.0 to 4.0
Molybdenum (Mo), % 2.0 to 2.5
5.2 to 6.2
Nickel (Ni), % 10 to 13
21 to 24
Nitrogen (N), % 0 to 0.1
0.35 to 0.6
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5