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ACI-ASTM CD3MCuN Steel vs. S32750 Stainless Steel

Both ACI-ASTM CD3MCuN steel and S32750 stainless steel are iron alloys. They have a very high 98% 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 CD3MCuN steel and the bottom bar is S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 29
17
Fatigue Strength, MPa 370
360
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 80
81
Tensile Strength: Ultimate (UTS), MPa 790
860
Tensile Strength: Yield (Proof), MPa 500
590

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 1440
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 13
12

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 20
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.9
4.1
Embodied Energy, MJ/kg 54
56
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 41
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
130
Resilience: Unit (Modulus of Resilience), kJ/m3 620
860
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
31
Strength to Weight: Bending, points 24
26
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 22
25

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 24 to 26.7
24 to 26
Copper (Cu), % 1.4 to 1.9
0 to 0.5
Iron (Fe), % 58.2 to 65.9
58.1 to 66.8
Manganese (Mn), % 0 to 1.2
0 to 1.2
Molybdenum (Mo), % 2.9 to 3.8
3.0 to 5.0
Nickel (Ni), % 5.6 to 6.7
6.0 to 8.0
Nitrogen (N), % 0.22 to 0.33
0.24 to 0.32
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 1.1
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.020