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ACI-ASTM CF3 Steel vs. ASTM Grade HI Steel

Both ACI-ASTM CF3 steel and ASTM grade HI steel are iron alloys. They have 84% of their average alloy composition in common.

For each property being compared, the top bar is ACI-ASTM CF3 steel and the bottom bar is ASTM grade HI steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 60
11
Fatigue Strength, MPa 270
150
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 510
550
Tensile Strength: Yield (Proof), MPa 250
270

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 960
1100
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1450
1350
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
23
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
4.1
Embodied Energy, MJ/kg 45
59
Embodied Water, L/kg 150
200

Common Calculations

PREN (Pitting Resistance) 20
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
52
Resilience: Unit (Modulus of Resilience), kJ/m3 160
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
20
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 4.3
3.9
Thermal Shock Resistance, points 11
12

Alloy Composition

Carbon (C), % 0 to 0.030
0.2 to 0.5
Chromium (Cr), % 17 to 21
26 to 30
Iron (Fe), % 62.9 to 75
46.9 to 59.8
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 8.0 to 12
14 to 18
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.040