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ACI-ASTM CD4MCu Steel vs. S82031 Stainless Steel

Both ACI-ASTM CD4MCu steel and S82031 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD4MCu steel and the bottom bar is S82031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 18
39
Fatigue Strength, MPa 340
490
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 770
780
Tensile Strength: Yield (Proof), MPa 550
570

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 1100
980
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
15
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
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.5
2.8
Embodied Energy, MJ/kg 49
39
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 32
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
280
Resilience: Unit (Modulus of Resilience), kJ/m3 760
820
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
3.9
Thermal Shock Resistance, points 21
22

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.050
Chromium (Cr), % 24.5 to 26.5
19 to 22
Copper (Cu), % 2.8 to 3.3
0 to 1.0
Iron (Fe), % 59.9 to 66.3
68 to 78.3
Manganese (Mn), % 0 to 1.0
0 to 2.5
Molybdenum (Mo), % 1.8 to 2.3
0.6 to 1.4
Nickel (Ni), % 4.8 to 6.0
2.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.0050