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ACI-ASTM CF8 Steel vs. SAE-AISI 9254 Steel

Both ACI-ASTM CF8 steel and SAE-AISI 9254 steel are iron alloys. They have 71% of their average alloy composition in common. There are 30 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 SAE-AISI 9254 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 55
20
Fatigue Strength, MPa 260
280
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 540
660
Tensile Strength: Yield (Proof), MPa 260
410

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Mechanical, °C 980
410
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
46
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 16
2.2
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.1
1.5
Embodied Energy, MJ/kg 44
20
Embodied Water, L/kg 150
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
110
Resilience: Unit (Modulus of Resilience), kJ/m3 160
450
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 4.3
12
Thermal Shock Resistance, points 13
20

Alloy Composition

Carbon (C), % 0 to 0.080
0.51 to 0.59
Chromium (Cr), % 18 to 21
0.6 to 0.8
Iron (Fe), % 63.8 to 74
96.1 to 97.1
Manganese (Mn), % 0 to 1.5
0.6 to 0.8
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 8.0 to 11
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
1.2 to 1.6
Sulfur (S), % 0 to 0.040
0 to 0.040