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SAE-AISI 1018 Steel vs. EN 1.4578 Stainless Steel

Both SAE-AISI 1018 steel and EN 1.4578 stainless steel are iron alloys. They have 66% 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 SAE-AISI 1018 steel and the bottom bar is EN 1.4578 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
51
Fatigue Strength, MPa 180 to 270
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 280 to 300
400
Tensile Strength: Ultimate (UTS), MPa 430 to 480
550
Tensile Strength: Yield (Proof), MPa 240 to 400
200

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
930
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
14
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
19
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.4
3.7
Embodied Energy, MJ/kg 18
51
Embodied Water, L/kg 46
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 75 to 100
220
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 430
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 15 to 17
19
Strength to Weight: Bending, points 16 to 17
19
Thermal Diffusivity, mm2/s 14
3.9
Thermal Shock Resistance, points 14 to 15
12

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.040
Chromium (Cr), % 0
16.5 to 17.5
Copper (Cu), % 0
3.0 to 3.5
Iron (Fe), % 98.8 to 99.25
62.3 to 68.5
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 0
10 to 11
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.015