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ACI-ASTM CT15C Steel vs. S44401 Stainless Steel

Both ACI-ASTM CT15C steel and S44401 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CT15C steel and the bottom bar is S44401 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
21
Fatigue Strength, MPa 130
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 500
480
Tensile Strength: Yield (Proof), MPa 190
300

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 560
510
Maximum Temperature: Mechanical, °C 1080
930
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 12
22
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 36
12
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 6.1
2.9
Embodied Energy, MJ/kg 88
40
Embodied Water, L/kg 190
130

Common Calculations

PREN (Pitting Resistance) 20
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 90
90
Resilience: Unit (Modulus of Resilience), kJ/m3 93
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 3.2
5.9
Thermal Shock Resistance, points 12
17

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.025
Chromium (Cr), % 19 to 21
17.5 to 19.5
Iron (Fe), % 40.3 to 49.2
75.1 to 80.6
Manganese (Mn), % 0.15 to 1.5
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 31 to 34
0 to 1.0
Niobium (Nb), % 0.5 to 1.5
0
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 1.5
0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8