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ACI-ASTM CD3MWCuN Steel vs. S31254 Stainless Steel

Both ACI-ASTM CD3MWCuN steel and S31254 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD3MWCuN steel and the bottom bar is S31254 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 29
40
Fatigue Strength, MPa 370
290
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 790
720
Tensile Strength: Yield (Proof), MPa 500
330

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 22
28
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 4.2
5.5
Embodied Energy, MJ/kg 58
74
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 42
44
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
240
Resilience: Unit (Modulus of Resilience), kJ/m3 620
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
25
Strength to Weight: Bending, points 24
22
Thermal Diffusivity, mm2/s 4.2
3.8
Thermal Shock Resistance, points 22
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 24 to 26
19.5 to 20.5
Copper (Cu), % 0.5 to 1.0
0.5 to 1.0
Iron (Fe), % 56.6 to 65.3
51.4 to 56.3
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
6.0 to 6.5
Nickel (Ni), % 6.5 to 8.5
17.5 to 18.5
Nitrogen (N), % 0.2 to 0.3
0.18 to 0.22
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.025
0 to 0.010
Tungsten (W), % 0.5 to 1.0
0