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ACI-ASTM CF8M Steel vs. EN 1.7720 Steel

Both ACI-ASTM CF8M steel and EN 1.7720 steel are iron alloys. They have 68% 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 ACI-ASTM CF8M steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
19
Fatigue Strength, MPa 280
230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 540
590
Tensile Strength: Yield (Proof), MPa 290
340

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1000
410
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
40
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.8
2.2
Embodied Energy, MJ/kg 53
30
Embodied Water, L/kg 160
51

Common Calculations

PREN (Pitting Resistance) 28
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
97
Resilience: Unit (Modulus of Resilience), kJ/m3 210
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
21
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 4.3
11
Thermal Shock Resistance, points 12
17

Alloy Composition

Carbon (C), % 0 to 0.080
0.1 to 0.15
Chromium (Cr), % 18 to 21
0.3 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 60.3 to 71
96.6 to 98.6
Manganese (Mn), % 0 to 1.5
0.4 to 0.7
Molybdenum (Mo), % 2.0 to 3.0
0.4 to 0.6
Nickel (Ni), % 9.0 to 12
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0 to 0.45
Sulfur (S), % 0 to 0.040
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3