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ACI-ASTM CF8 Steel vs. S32750 Stainless Steel

Both ACI-ASTM CF8 steel and S32750 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 32 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 S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
270
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 55
17
Fatigue Strength, MPa 260
360
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 540
860
Tensile Strength: Yield (Proof), MPa 260
590

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 15
12

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
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.1
4.1
Embodied Energy, MJ/kg 44
56
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 20
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
130
Resilience: Unit (Modulus of Resilience), kJ/m3 160
860
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
31
Strength to Weight: Bending, points 19
26
Thermal Diffusivity, mm2/s 4.3
4.0
Thermal Shock Resistance, points 13
25

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 21
24 to 26
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 63.8 to 74
58.1 to 66.8
Manganese (Mn), % 0 to 1.5
0 to 1.2
Molybdenum (Mo), % 0 to 0.5
3.0 to 5.0
Nickel (Ni), % 8.0 to 11
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.020