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EN 1.3940 Stainless Steel vs. EN 1.4477 Stainless Steel

Both EN 1.3940 stainless steel and EN 1.4477 stainless steel are iron alloys. They have 86% 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 EN 1.3940 stainless steel and the bottom bar is EN 1.4477 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34
22 to 23
Fatigue Strength, MPa 190
420 to 490
Impact Strength: V-Notched Charpy, J 130
110
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 540
880 to 930
Tensile Strength: Yield (Proof), MPa 240
620 to 730

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
460
Maximum Temperature: Mechanical, °C 930
1100
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
20
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.3
3.7
Embodied Energy, MJ/kg 47
52
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 20
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 150
940 to 1290
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
31 to 33
Strength to Weight: Bending, points 19
26 to 27
Thermal Diffusivity, mm2/s 4.1
3.5
Thermal Shock Resistance, points 16
23 to 25

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 16.5 to 18.5
28 to 30
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 64.2 to 71.4
56.6 to 63.6
Manganese (Mn), % 0 to 2.0
0.8 to 1.5
Molybdenum (Mo), % 0
1.5 to 2.6
Nickel (Ni), % 12 to 14
5.8 to 7.5
Nitrogen (N), % 0.1 to 0.2
0.3 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.015