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EN 1.7725 Steel vs. ACI-ASTM CD4MCu Steel

Both EN 1.7725 steel and ACI-ASTM CD4MCu steel are iron alloys. They have 66% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is ACI-ASTM CD4MCu steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
18
Fatigue Strength, MPa 390 to 550
340
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
770
Tensile Strength: Yield (Proof), MPa 610 to 860
550

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
17
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.5
Embodied Energy, MJ/kg 24
49
Embodied Water, L/kg 54
180

Common Calculations

PREN (Pitting Resistance) 2.8
32
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
130
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
28
Strength to Weight: Bending, points 25 to 28
24
Thermal Diffusivity, mm2/s 11
4.5
Thermal Shock Resistance, points 24 to 29
21

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.040
Chromium (Cr), % 1.3 to 1.7
24.5 to 26.5
Copper (Cu), % 0
2.8 to 3.3
Iron (Fe), % 95.7 to 97.5
59.9 to 66.3
Manganese (Mn), % 0.6 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.3 to 0.5
1.8 to 2.3
Nickel (Ni), % 0
4.8 to 6.0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.050 to 0.15
0