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ACI-ASTM CF8 Steel vs. S35500 Stainless Steel

Both ACI-ASTM CF8 steel and S35500 stainless steel are iron alloys. They have a moderately high 90% 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 ACI-ASTM CF8 steel and the bottom bar is S35500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 55
14
Fatigue Strength, MPa 260
690 to 730
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 540
1330 to 1490
Tensile Strength: Yield (Proof), MPa 260
1200 to 1280

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 980
870
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 16
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.5
Embodied Energy, MJ/kg 44
47
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 20
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 160
3610 to 4100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
47 to 53
Strength to Weight: Bending, points 19
34 to 37
Thermal Diffusivity, mm2/s 4.3
4.4
Thermal Shock Resistance, points 13
44 to 49

Alloy Composition

Carbon (C), % 0 to 0.080
0.1 to 0.15
Chromium (Cr), % 18 to 21
15 to 16
Iron (Fe), % 63.8 to 74
73.2 to 77.7
Manganese (Mn), % 0 to 1.5
0.5 to 1.3
Molybdenum (Mo), % 0 to 0.5
2.5 to 3.2
Nickel (Ni), % 8.0 to 11
4.0 to 5.0
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0.070 to 0.13
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030