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SAE-AISI A9 Steel vs. ACI-ASTM CG6MMN Steel

Both SAE-AISI A9 steel and ACI-ASTM CG6MMN steel are iron alloys. They have 66% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is ACI-ASTM CG6MMN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
79
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
670

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.7
4.8
Embodied Energy, MJ/kg 70
68
Embodied Water, L/kg 82
180

Common Calculations

PREN (Pitting Resistance) 10
34
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 73
24
Strength to Weight: Bending, points 24 to 46
22
Thermal Shock Resistance, points 25 to 66
14

Alloy Composition

Carbon (C), % 0.45 to 0.55
0 to 0.060
Chromium (Cr), % 4.8 to 5.5
20.5 to 23.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87 to 90.5
51.9 to 62.1
Manganese (Mn), % 0 to 0.5
4.0 to 6.0
Molybdenum (Mo), % 1.3 to 1.8
1.5 to 3.0
Nickel (Ni), % 1.3 to 1.8
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 1.0 to 1.2
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.8 to 1.4
0.1 to 0.3