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SAE-AISI 1080 Steel vs. EN 1.3940 Stainless Steel

Both SAE-AISI 1080 steel and EN 1.3940 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1080 steel and the bottom bar is EN 1.3940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
34
Fatigue Strength, MPa 300 to 360
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 770 to 870
540
Tensile Strength: Yield (Proof), MPa 480 to 590
240

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
930
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.6
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.3
Embodied Energy, MJ/kg 19
47
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 84
150
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 920
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 31
19
Strength to Weight: Bending, points 24 to 26
19
Thermal Diffusivity, mm2/s 14
4.1
Thermal Shock Resistance, points 25 to 29
16

Alloy Composition

Carbon (C), % 0.75 to 0.88
0 to 0.030
Chromium (Cr), % 0
16.5 to 18.5
Iron (Fe), % 98.1 to 98.7
64.2 to 71.4
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Nickel (Ni), % 0
12 to 14
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.020