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SAE-AISI 1018 Steel vs. AISI 304N Stainless Steel

Both SAE-AISI 1018 steel and AISI 304N stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1018 steel and the bottom bar is AISI 304N stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
190 to 360
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
9.1 to 45
Fatigue Strength, MPa 180 to 270
220 to 440
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 280 to 300
420 to 700
Tensile Strength: Ultimate (UTS), MPa 430 to 480
620 to 1180
Tensile Strength: Yield (Proof), MPa 240 to 400
270 to 850

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
960
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
16
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
15
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.0
Embodied Energy, MJ/kg 18
43
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 75 to 100
98 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 430
180 to 1830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 15 to 17
22 to 42
Strength to Weight: Bending, points 16 to 17
21 to 32
Thermal Diffusivity, mm2/s 14
4.2
Thermal Shock Resistance, points 14 to 15
14 to 26

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.080
Chromium (Cr), % 0
18 to 20
Iron (Fe), % 98.8 to 99.25
66.4 to 73.9
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Nickel (Ni), % 0
8.0 to 10.5
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030