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ASTM A387 Grade 9 Steel vs. ACI-ASTM CT15C Steel

Both ASTM A387 grade 9 steel and ACI-ASTM CT15C steel are iron alloys. They have 55% 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 A387 grade 9 steel and the bottom bar is ACI-ASTM CT15C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
140
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
23
Fatigue Strength, MPa 160 to 240
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Tensile Strength: Ultimate (UTS), MPa 500 to 600
500
Tensile Strength: Yield (Proof), MPa 230 to 350
190

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Mechanical, °C 600
1080
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 10
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
36
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.1
6.1
Embodied Energy, MJ/kg 28
88
Embodied Water, L/kg 87
190

Common Calculations

PREN (Pitting Resistance) 12
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
90
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
93
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 21
17
Strength to Weight: Bending, points 18 to 20
17
Thermal Diffusivity, mm2/s 6.9
3.2
Thermal Shock Resistance, points 14 to 17
12

Alloy Composition

Carbon (C), % 0 to 0.15
0.050 to 0.15
Chromium (Cr), % 8.0 to 10
19 to 21
Iron (Fe), % 87.1 to 90.8
40.3 to 49.2
Manganese (Mn), % 0.3 to 0.6
0.15 to 1.5
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
31 to 34
Niobium (Nb), % 0
0.5 to 1.5
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 1.0
0.15 to 1.5
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0 to 0.040
0