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ACI-ASTM CT15C Steel vs. ASTM A372 Grade M Steel

Both ACI-ASTM CT15C steel and ASTM A372 grade M steel are iron alloys. They have 50% 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 ACI-ASTM CT15C steel and the bottom bar is ASTM A372 grade M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
240 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
18 to 21
Fatigue Strength, MPa 130
450 to 520
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 500
810 to 910
Tensile Strength: Yield (Proof), MPa 190
660 to 770

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1080
450
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 12
46
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
5.0
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 6.1
2.0
Embodied Energy, MJ/kg 88
27
Embodied Water, L/kg 190
61

Common Calculations

PREN (Pitting Resistance) 20
3.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 90
160
Resilience: Unit (Modulus of Resilience), kJ/m3 93
1140 to 1580
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
29 to 32
Strength to Weight: Bending, points 17
24 to 27
Thermal Diffusivity, mm2/s 3.2
12
Thermal Shock Resistance, points 12
24 to 27

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.23
Chromium (Cr), % 19 to 21
1.5 to 2.0
Iron (Fe), % 40.3 to 49.2
92.5 to 95.1
Manganese (Mn), % 0.15 to 1.5
0.2 to 0.4
Molybdenum (Mo), % 0
0.4 to 0.6
Nickel (Ni), % 31 to 34
2.8 to 3.9
Niobium (Nb), % 0.5 to 1.5
0
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.15 to 1.5
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.010
Vanadium (V), % 0
0 to 0.080