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ACI-ASTM CD4MCu Steel vs. EN 1.4525 Stainless Steel

Both ACI-ASTM CD4MCu steel and EN 1.4525 stainless steel are iron alloys. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is ACI-ASTM CD4MCu steel and the bottom bar is EN 1.4525 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 18
5.6 to 13
Fatigue Strength, MPa 340
480 to 540
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
76
Tensile Strength: Ultimate (UTS), MPa 770
1030 to 1250
Tensile Strength: Yield (Proof), MPa 550
840 to 1120

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 1100
860
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
18
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 18
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.5
2.8
Embodied Energy, MJ/kg 49
39
Embodied Water, L/kg 180
130

Common Calculations

PREN (Pitting Resistance) 32
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
68 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 760
1820 to 3230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
36 to 45
Strength to Weight: Bending, points 24
29 to 33
Thermal Diffusivity, mm2/s 4.5
4.7
Thermal Shock Resistance, points 21
34 to 41

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.070
Chromium (Cr), % 24.5 to 26.5
15 to 17
Copper (Cu), % 2.8 to 3.3
2.5 to 4.0
Iron (Fe), % 59.9 to 66.3
70.4 to 79
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.8 to 2.3
0 to 0.8
Nickel (Ni), % 4.8 to 6.0
3.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.025