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ACI-ASTM CA6NM Steel vs. EN 1.7221 Steel

Both ACI-ASTM CA6NM steel and EN 1.7221 steel are iron alloys. They have 84% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA6NM steel and the bottom bar is EN 1.7221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
200 to 230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
11 to 17
Fatigue Strength, MPa 380
290 to 390
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 850
650 to 780
Tensile Strength: Yield (Proof), MPa 620
430 to 630

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 770
420
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
44
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.5
1.5
Embodied Energy, MJ/kg 34
20
Embodied Water, L/kg 110
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
83 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
490 to 1050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 30
23 to 27
Strength to Weight: Bending, points 26
21 to 24
Thermal Diffusivity, mm2/s 6.7
12
Thermal Shock Resistance, points 31
19 to 23

Alloy Composition

Carbon (C), % 0 to 0.060
0.22 to 0.29
Chromium (Cr), % 11.5 to 14
0.8 to 1.2
Iron (Fe), % 78.4 to 84.6
96.8 to 98.3
Manganese (Mn), % 0 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0.4 to 1.0
0.15 to 0.3
Nickel (Ni), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030