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SAE-AISI 9255 Steel vs. ACI-ASTM CE8MN Steel

Both SAE-AISI 9255 steel and ACI-ASTM CE8MN steel are iron alloys. They have 63% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 9255 steel and the bottom bar is ACI-ASTM CE8MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
29
Fatigue Strength, MPa 270
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
80
Tensile Strength: Ultimate (UTS), MPa 680
750
Tensile Strength: Yield (Proof), MPa 390
500

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 46
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
21
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.5
4.2
Embodied Energy, MJ/kg 20
58
Embodied Water, L/kg 46
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
190
Resilience: Unit (Modulus of Resilience), kJ/m3 400
620
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
27
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 13
4.2
Thermal Shock Resistance, points 21
21

Alloy Composition

Carbon (C), % 0.51 to 0.59
0 to 0.080
Chromium (Cr), % 0
22.5 to 25.5
Iron (Fe), % 96.2 to 97
56 to 66.4
Manganese (Mn), % 0.7 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
3.0 to 4.5
Nickel (Ni), % 0
8.0 to 11
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 1.8 to 2.2
0 to 1.5
Sulfur (S), % 0 to 0.040
0 to 0.040