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ASTM A372 Grade M Steel vs. ACI-ASTM CF3MN Steel

Both ASTM A372 grade M steel and ACI-ASTM CF3MN steel are iron alloys. They have 71% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A372 grade M steel and the bottom bar is ACI-ASTM CF3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240 to 280
170
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 18 to 21
39
Fatigue Strength, MPa 450 to 520
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 810 to 910
580
Tensile Strength: Yield (Proof), MPa 660 to 770
290

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 450
1010
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 46
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
19
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.9
Embodied Energy, MJ/kg 27
53
Embodied Water, L/kg 61
160

Common Calculations

PREN (Pitting Resistance) 3.4
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1580
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 32
20
Strength to Weight: Bending, points 24 to 27
20
Thermal Diffusivity, mm2/s 12
4.1
Thermal Shock Resistance, points 24 to 27
13

Alloy Composition

Carbon (C), % 0 to 0.23
0 to 0.030
Chromium (Cr), % 1.5 to 2.0
17 to 22
Iron (Fe), % 92.5 to 95.1
58.7 to 71.9
Manganese (Mn), % 0.2 to 0.4
0 to 1.5
Molybdenum (Mo), % 0.4 to 0.6
2.0 to 3.0
Nickel (Ni), % 2.8 to 3.9
9.0 to 13
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.5
Sulfur (S), % 0 to 0.010
0 to 0.040
Vanadium (V), % 0 to 0.080
0