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ACI-ASTM CF8 Steel vs. S35045 Stainless Steel

Both ACI-ASTM CF8 steel and S35045 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 (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF8 steel and the bottom bar is S35045 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 55
39
Fatigue Strength, MPa 260
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 540
540
Tensile Strength: Yield (Proof), MPa 260
190

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 420
520
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1420
1390
Melting Onset (Solidus), °C 1430
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
12
Thermal Expansion, µm/m-K 15
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 16
34
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.1
5.8
Embodied Energy, MJ/kg 44
83
Embodied Water, L/kg 150
230

Common Calculations

PREN (Pitting Resistance) 20
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
170
Resilience: Unit (Modulus of Resilience), kJ/m3 160
94
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 4.3
3.2
Thermal Shock Resistance, points 13
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0 to 0.080
0.060 to 0.1
Chromium (Cr), % 18 to 21
25 to 29
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 63.8 to 74
29.4 to 42.6
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 8.0 to 11
32 to 37
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6