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ACI-ASTM CD4MCu Steel vs. S43940 Stainless Steel

Both ACI-ASTM CD4MCu steel and S43940 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 31 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 ACI-ASTM CD4MCu steel and the bottom bar is S43940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 18
21
Fatigue Strength, MPa 340
180
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 770
490
Tensile Strength: Yield (Proof), MPa 550
280

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 450
540
Maximum Temperature: Mechanical, °C 1100
890
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 18
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.5
2.6
Embodied Energy, MJ/kg 49
38
Embodied Water, L/kg 180
120

Common Calculations

PREN (Pitting Resistance) 32
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
86
Resilience: Unit (Modulus of Resilience), kJ/m3 760
200
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
18
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 4.5
6.8
Thermal Shock Resistance, points 21
18

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.030
Chromium (Cr), % 24.5 to 26.5
17.5 to 18.5
Copper (Cu), % 2.8 to 3.3
0
Iron (Fe), % 59.9 to 66.3
78.2 to 82.1
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.8 to 2.3
0
Nickel (Ni), % 4.8 to 6.0
0
Niobium (Nb), % 0
0.3 to 0.6
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 0.015
Titanium (Ti), % 0
0.1 to 0.6