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EN 1.3940 Stainless Steel vs. S33550 Stainless Steel

Both EN 1.3940 stainless steel and S33550 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 31 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 EN 1.3940 stainless steel and the bottom bar is S33550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
40
Fatigue Strength, MPa 190
270
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 540
680
Tensile Strength: Yield (Proof), MPa 240
310

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
470
Maximum Temperature: Mechanical, °C 930
1100
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
24
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
4.3
Embodied Energy, MJ/kg 47
61
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 20
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
220
Resilience: Unit (Modulus of Resilience), kJ/m3 150
250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 4.1
3.9
Thermal Shock Resistance, points 16
15

Alloy Composition

Carbon (C), % 0 to 0.030
0.040 to 0.1
Cerium (Ce), % 0
0.025 to 0.070
Chromium (Cr), % 16.5 to 18.5
25 to 28
Iron (Fe), % 64.2 to 71.4
48.8 to 58.2
Lanthanum (La), % 0
0.025 to 0.070
Manganese (Mn), % 0 to 2.0
0 to 1.5
Nickel (Ni), % 12 to 14
16.5 to 20
Niobium (Nb), % 0
0.050 to 0.15
Nitrogen (N), % 0.1 to 0.2
0.18 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030