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ASTM A369 Grade FP9 vs. ACI-ASTM CD3MCuN Steel

Both ASTM A369 grade FP9 and ACI-ASTM CD3MCuN steel are iron alloys. They have 73% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP9 and the bottom bar is ACI-ASTM CD3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
29
Fatigue Strength, MPa 160
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
80
Tensile Strength: Ultimate (UTS), MPa 470
790
Tensile Strength: Yield (Proof), MPa 240
500

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Mechanical, °C 600
1100
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.9
Embodied Energy, MJ/kg 28
54
Embodied Water, L/kg 87
180

Common Calculations

PREN (Pitting Resistance) 12
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
200
Resilience: Unit (Modulus of Resilience), kJ/m3 140
620
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
28
Strength to Weight: Bending, points 17
24
Thermal Diffusivity, mm2/s 6.9
4.1
Thermal Shock Resistance, points 13
22

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 8.0 to 10
24 to 26.7
Copper (Cu), % 0
1.4 to 1.9
Iron (Fe), % 87.1 to 90.3
58.2 to 65.9
Manganese (Mn), % 0.3 to 0.6
0 to 1.2
Molybdenum (Mo), % 0.9 to 1.1
2.9 to 3.8
Nickel (Ni), % 0
5.6 to 6.7
Nitrogen (N), % 0
0.22 to 0.33
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.5 to 1.0
0 to 1.1
Sulfur (S), % 0 to 0.030
0 to 0.030