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EN 1.6781 Steel vs. ACI-ASTM CK3MCuN Steel

Both EN 1.6781 steel and ACI-ASTM CK3MCuN steel are iron alloys. They have 59% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.6781 steel and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17
39
Fatigue Strength, MPa 450
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 830
620
Tensile Strength: Yield (Proof), MPa 680
290

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 450
1090
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 44
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
29
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.9
5.6
Embodied Energy, MJ/kg 25
76
Embodied Water, L/kg 60
190

Common Calculations

PREN (Pitting Resistance) 3.3
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1220
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
21
Strength to Weight: Bending, points 25
20
Thermal Diffusivity, mm2/s 12
3.2
Thermal Shock Resistance, points 24
14

Alloy Composition

Carbon (C), % 0.15 to 0.19
0 to 0.025
Chromium (Cr), % 1.3 to 1.8
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 92.6 to 94.6
49.5 to 56.3
Manganese (Mn), % 0.55 to 0.8
0 to 1.2
Molybdenum (Mo), % 0.45 to 0.6
6.0 to 7.0
Nickel (Ni), % 3.0 to 3.5
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010