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ACI-ASTM CG6MMN Steel vs. ACI-ASTM CN7M Steel

Both ACI-ASTM CG6MMN steel and ACI-ASTM CN7M steel are iron alloys. Both are furnished in the heat treated (HT) condition. They have 80% 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 CG6MMN steel and the bottom bar is ACI-ASTM CN7M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
44
Fatigue Strength, MPa 260
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 670
480
Tensile Strength: Yield (Proof), MPa 320
200

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 460
430
Maximum Temperature: Mechanical, °C 1080
1100
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1380
1450
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
15

Otherwise Unclassified Properties

Base Metal Price, % relative 22
32
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.8
5.6
Embodied Energy, MJ/kg 68
78
Embodied Water, L/kg 180
210

Common Calculations

PREN (Pitting Resistance) 34
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
170
Resilience: Unit (Modulus of Resilience), kJ/m3 260
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
17
Strength to Weight: Bending, points 22
17
Thermal Shock Resistance, points 14
12

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.070
Chromium (Cr), % 20.5 to 23.5
19 to 22
Copper (Cu), % 0
3.0 to 4.0
Iron (Fe), % 51.9 to 62.1
37.4 to 48.5
Manganese (Mn), % 4.0 to 6.0
0 to 1.5
Molybdenum (Mo), % 1.5 to 3.0
2.0 to 3.0
Nickel (Ni), % 11.5 to 13.5
27.5 to 30.5
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.1 to 0.3
0