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ASTM A356 Grade 8 vs. ACI-ASTM CF16Fa Steel

Both ASTM A356 grade 8 and ACI-ASTM CF16Fa steel are iron alloys. Both are furnished in the heat treated (HT) condition. They have 70% 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 A356 grade 8 and the bottom bar is ACI-ASTM CF16Fa steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
28
Fatigue Strength, MPa 270
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 630
540
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 440
980
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 38
16
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.3
Embodied Energy, MJ/kg 26
47
Embodied Water, L/kg 55
150

Common Calculations

PREN (Pitting Resistance) 4.7
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 390
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
19
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 10
4.2
Thermal Shock Resistance, points 18
12

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.16
Chromium (Cr), % 1.0 to 1.5
18 to 21
Iron (Fe), % 95.4 to 97.4
62.1 to 72.4
Manganese (Mn), % 0.5 to 0.9
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.2
0.4 to 0.8
Nickel (Ni), % 0
9.0 to 12
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.2 to 0.6
0 to 2.0
Sulfur (S), % 0 to 0.030
0.2 to 0.4
Vanadium (V), % 0.050 to 0.15
0