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S17700 Stainless Steel vs. SAE-AISI 1018 Steel

Both S17700 stainless steel and SAE-AISI 1018 steel are iron alloys. They have 74% 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 S17700 stainless steel and the bottom bar is SAE-AISI 1018 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 430
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 1.0 to 23
17 to 27
Fatigue Strength, MPa 290 to 560
180 to 270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 740 to 940
280 to 300
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
430 to 480
Tensile Strength: Yield (Proof), MPa 430 to 1210
240 to 400

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 890
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
52
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
1.8
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.4
Embodied Energy, MJ/kg 40
18
Embodied Water, L/kg 150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
75 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
150 to 430
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 42 to 59
15 to 17
Strength to Weight: Bending, points 32 to 40
16 to 17
Thermal Diffusivity, mm2/s 4.1
14
Thermal Shock Resistance, points 39 to 54
14 to 15

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0.15 to 0.2
Chromium (Cr), % 16 to 18
0
Iron (Fe), % 70.5 to 76.8
98.8 to 99.25
Manganese (Mn), % 0 to 1.0
0.6 to 0.9
Nickel (Ni), % 6.5 to 7.8
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050