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ACI-ASTM CA40 Steel vs. ACI-ASTM CG6MMN Steel

Both ACI-ASTM CA40 steel and ACI-ASTM CG6MMN steel are iron alloys. Both are furnished in the heat treated (HT) condition. They have 72% of their average alloy composition in common. There are 28 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 ACI-ASTM CA40 steel and the bottom bar is ACI-ASTM CG6MMN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10
34
Fatigue Strength, MPa 460
260
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Tensile Strength: Ultimate (UTS), MPa 910
670
Tensile Strength: Yield (Proof), MPa 860
320

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
460
Maximum Temperature: Mechanical, °C 750
1080
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1500
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 10
17

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
22
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
4.8
Embodied Energy, MJ/kg 28
68
Embodied Water, L/kg 100
180

Common Calculations

PREN (Pitting Resistance) 14
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
24
Strength to Weight: Bending, points 27
22
Thermal Shock Resistance, points 33
14

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.060
Chromium (Cr), % 11.5 to 14
20.5 to 23.5
Iron (Fe), % 81.5 to 88.3
51.9 to 62.1
Manganese (Mn), % 0 to 1.0
4.0 to 6.0
Molybdenum (Mo), % 0 to 0.5
1.5 to 3.0
Nickel (Ni), % 0 to 1.0
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 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3