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ACI-ASTM CN7M Steel vs. EN 1.7720 Steel

Both ACI-ASTM CN7M steel and EN 1.7720 steel are iron alloys. They have 45% 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 CN7M steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
19
Fatigue Strength, MPa 190
230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 480
590
Tensile Strength: Yield (Proof), MPa 200
340

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1410
1470
Melting Onset (Solidus), °C 1450
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 21
40
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 32
2.8
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 5.6
2.2
Embodied Energy, MJ/kg 78
30
Embodied Water, L/kg 210
51

Common Calculations

PREN (Pitting Resistance) 29
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
97
Resilience: Unit (Modulus of Resilience), kJ/m3 110
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
21
Strength to Weight: Bending, points 17
20
Thermal Diffusivity, mm2/s 5.6
11
Thermal Shock Resistance, points 12
17

Alloy Composition

Carbon (C), % 0 to 0.070
0.1 to 0.15
Chromium (Cr), % 19 to 22
0.3 to 0.5
Copper (Cu), % 3.0 to 4.0
0 to 0.3
Iron (Fe), % 37.4 to 48.5
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), % 27.5 to 30.5
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.5
0 to 0.45
Sulfur (S), % 0 to 0.040
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3