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ACI-ASTM CG3M Steel vs. SAE-AISI 9255 Steel

Both ACI-ASTM CG3M steel and SAE-AISI 9255 steel are iron alloys. They have 66% 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 CG3M steel and the bottom bar is SAE-AISI 9255 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
21
Fatigue Strength, MPa 200
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
72
Tensile Strength: Ultimate (UTS), MPa 580
680
Tensile Strength: Yield (Proof), MPa 270
390

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Mechanical, °C 1020
400
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 16
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 20
2.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.1
1.5
Embodied Energy, MJ/kg 56
20
Embodied Water, L/kg 160
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 190
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
24
Strength to Weight: Bending, points 20
22
Thermal Diffusivity, mm2/s 4.1
13
Thermal Shock Resistance, points 13
21

Alloy Composition

Carbon (C), % 0 to 0.030
0.51 to 0.59
Chromium (Cr), % 18 to 21
0
Iron (Fe), % 58.9 to 70
96.2 to 97
Manganese (Mn), % 0 to 1.5
0.7 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 9.0 to 13
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.5
1.8 to 2.2
Sulfur (S), % 0 to 0.040
0 to 0.040