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ACI-ASTM CD3MCuN Steel vs. S21800 Stainless Steel

Both ACI-ASTM CD3MCuN steel and S21800 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 (8, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD3MCuN steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
40
Fatigue Strength, MPa 370
330
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 790
740
Tensile Strength: Yield (Proof), MPa 500
390

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Maximum Temperature: Corrosion, °C 450
410
Maximum Temperature: Mechanical, °C 1100
900
Melting Completion (Liquidus), °C 1440
1360
Melting Onset (Solidus), °C 1390
1310
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 20
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 3.9
3.1
Embodied Energy, MJ/kg 54
45
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 41
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
250
Resilience: Unit (Modulus of Resilience), kJ/m3 620
390
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 28
27
Strength to Weight: Bending, points 24
24
Thermal Shock Resistance, points 22
17

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 24 to 26.7
16 to 18
Copper (Cu), % 1.4 to 1.9
0
Iron (Fe), % 58.2 to 65.9
59.1 to 65.4
Manganese (Mn), % 0 to 1.2
7.0 to 9.0
Molybdenum (Mo), % 2.9 to 3.8
0
Nickel (Ni), % 5.6 to 6.7
8.0 to 9.0
Nitrogen (N), % 0.22 to 0.33
0.080 to 0.18
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0 to 1.1
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030