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SAE-AISI 1018 Steel vs. S38815 Stainless Steel

Both SAE-AISI 1018 steel and S38815 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1018 steel and the bottom bar is S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 140
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 27
34
Fatigue Strength, MPa 180 to 270
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 280 to 300
410
Tensile Strength: Ultimate (UTS), MPa 430 to 480
610
Tensile Strength: Yield (Proof), MPa 240 to 400
290

Thermal Properties

Latent Heat of Fusion, J/g 250
370
Maximum Temperature: Mechanical, °C 400
860
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
19
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 1.4
3.8
Embodied Energy, MJ/kg 18
54
Embodied Water, L/kg 46
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 75 to 100
170
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 430
220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 15 to 17
22
Strength to Weight: Bending, points 16 to 17
21
Thermal Shock Resistance, points 14 to 15
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0.15 to 0.2
0 to 0.030
Chromium (Cr), % 0
13 to 15
Copper (Cu), % 0
0.75 to 1.5
Iron (Fe), % 98.8 to 99.25
56.1 to 67
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
13 to 17
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
5.5 to 6.5
Sulfur (S), % 0 to 0.050
0 to 0.020