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ACI-ASTM CA40F Steel vs. ASTM Grade HF Steel

Both ACI-ASTM CA40F steel and ASTM grade HF steel are iron alloys. They have 82% of their average alloy composition in common.

For each property being compared, the top bar is ACI-ASTM CA40F steel and the bottom bar is ASTM grade HF steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13
29
Fatigue Strength, MPa 320
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 770
550
Tensile Strength: Yield (Proof), MPa 550
270

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 750
1000
Melting Completion (Liquidus), °C 1430
1410
Melting Onset (Solidus), °C 1390
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
16
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
17
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
3.2
Embodied Energy, MJ/kg 28
46
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 94
130
Resilience: Unit (Modulus of Resilience), kJ/m3 790
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
20
Strength to Weight: Bending, points 24
19
Thermal Diffusivity, mm2/s 7.2
4.2
Thermal Shock Resistance, points 28
12

Alloy Composition

Carbon (C), % 0.2 to 0.4
0.2 to 0.4
Chromium (Cr), % 11.5 to 14
18 to 23
Iron (Fe), % 81.6 to 88.3
60 to 73.8
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 1.0
8.0 to 12
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 2.0
Sulfur (S), % 0.2 to 0.4
0 to 0.040