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EN 1.4409 Stainless Steel vs. SAE-AISI 1078 Steel

Both EN 1.4409 stainless steel and SAE-AISI 1078 steel are iron alloys. They have 67% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4409 stainless steel and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
11 to 14
Fatigue Strength, MPa 180
270 to 350
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
72
Tensile Strength: Ultimate (UTS), MPa 490
730 to 780
Tensile Strength: Yield (Proof), MPa 220
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 990
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
49
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 19
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.7
1.4
Embodied Energy, MJ/kg 52
18
Embodied Water, L/kg 160
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 120
490 to 860
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
26 to 28
Strength to Weight: Bending, points 18
23 to 24
Thermal Diffusivity, mm2/s 4.1
13
Thermal Shock Resistance, points 11
25 to 26

Alloy Composition

Carbon (C), % 0 to 0.030
0.72 to 0.85
Chromium (Cr), % 18 to 20
0
Iron (Fe), % 61.7 to 71
98.5 to 99
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 9.0 to 12
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.5
0
Sulfur (S), % 0 to 0.025
0 to 0.050