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ASTM A372 Grade M Steel vs. ACI-ASTM CA40 Steel

Both ASTM A372 grade M steel and ACI-ASTM CA40 steel are iron alloys. They have 88% 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 CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240 to 280
310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18 to 21
10
Fatigue Strength, MPa 450 to 520
460
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 810 to 910
910
Tensile Strength: Yield (Proof), MPa 660 to 770
860

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 450
750
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1500
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 46
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
7.5
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.0
Embodied Energy, MJ/kg 27
28
Embodied Water, L/kg 61
100

Common Calculations

PREN (Pitting Resistance) 3.4
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
89
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1580
1910
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 32
33
Strength to Weight: Bending, points 24 to 27
27
Thermal Diffusivity, mm2/s 12
6.7
Thermal Shock Resistance, points 24 to 27
33

Alloy Composition

Carbon (C), % 0 to 0.23
0.2 to 0.4
Chromium (Cr), % 1.5 to 2.0
11.5 to 14
Iron (Fe), % 92.5 to 95.1
81.5 to 88.3
Manganese (Mn), % 0.2 to 0.4
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.6
0 to 0.5
Nickel (Ni), % 2.8 to 3.9
0 to 1.0
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