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ACI-ASTM CD3MCuN Steel vs. S31730 Stainless Steel

Both ACI-ASTM CD3MCuN steel and S31730 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD3MCuN steel and the bottom bar is S31730 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
170
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 790
540
Tensile Strength: Yield (Proof), MPa 500
200

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 20
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.9
4.6
Embodied Energy, MJ/kg 54
63
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 41
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
170
Resilience: Unit (Modulus of Resilience), kJ/m3 620
99
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 24
18
Thermal Shock Resistance, points 22
12

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 24 to 26.7
17 to 19
Copper (Cu), % 1.4 to 1.9
4.0 to 5.0
Iron (Fe), % 58.2 to 65.9
52.4 to 61
Manganese (Mn), % 0 to 1.2
0 to 2.0
Molybdenum (Mo), % 2.9 to 3.8
3.0 to 4.0
Nickel (Ni), % 5.6 to 6.7
15 to 16.5
Nitrogen (N), % 0.22 to 0.33
0 to 0.045
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.1
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010