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EN 1.4550 Stainless Steel vs. S31266 Stainless Steel

Both EN 1.4550 stainless steel and S31266 stainless steel are iron alloys. They have 70% 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 1.4550 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, % 42
40
Fatigue Strength, MPa 210
400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
81
Shear Strength, MPa 430
590
Tensile Strength: Ultimate (UTS), MPa 620
860
Tensile Strength: Yield (Proof), MPa 230
470

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 480
440
Maximum Temperature: Mechanical, °C 940
1100
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 18
37
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 3.6
6.5
Embodied Energy, MJ/kg 51
89
Embodied Water, L/kg 140
220

Common Calculations

PREN (Pitting Resistance) 18
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
290
Resilience: Unit (Modulus of Resilience), kJ/m3 140
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
29
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 4.0
3.1
Thermal Shock Resistance, points 14
18

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 17 to 19
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 64.9 to 74
34.1 to 46
Manganese (Mn), % 0 to 2.0
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 9.0 to 12
21 to 24
Niobium (Nb), % 0 to 1.0
0
Nitrogen (N), % 0
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