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ACI-ASTM CD4MCu Steel vs. ACI-ASTM CD4MCuN Steel

Both ACI-ASTM CD4MCu steel and ACI-ASTM CD4MCuN steel are iron alloys. Both are furnished in the normalized and tempered condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is ACI-ASTM CD4MCu steel and the bottom bar is ACI-ASTM CD4MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 18
18
Fatigue Strength, MPa 340
340
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 79
79
Tensile Strength: Ultimate (UTS), MPa 770
770
Tensile Strength: Yield (Proof), MPa 550
550

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
17
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 18
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.5
3.5
Embodied Energy, MJ/kg 49
49
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 32
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
130
Resilience: Unit (Modulus of Resilience), kJ/m3 760
760
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
28
Strength to Weight: Bending, points 24
24
Thermal Diffusivity, mm2/s 4.5
4.5
Thermal Shock Resistance, points 21
21

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.040
Chromium (Cr), % 24.5 to 26.5
24.5 to 26.5
Copper (Cu), % 2.8 to 3.3
2.7 to 3.3
Iron (Fe), % 59.9 to 66.3
59.5 to 66.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.8 to 2.3
1.7 to 2.3
Nickel (Ni), % 4.8 to 6.0
4.7 to 6.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.040