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ACI-ASTM CD4MCu Steel vs. S31100 Stainless Steel

Both ACI-ASTM CD4MCu steel and S31100 stainless steel are iron alloys. They have a very high 95% 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 CD4MCu steel and the bottom bar is S31100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 18
4.5
Fatigue Strength, MPa 340
330
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 79
79
Tensile Strength: Ultimate (UTS), MPa 770
1000
Tensile Strength: Yield (Proof), MPa 550
710

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
470
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 18
16
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.5
3.1
Embodied Energy, MJ/kg 49
44
Embodied Water, L/kg 180
170

Common Calculations

PREN (Pitting Resistance) 32
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
40
Resilience: Unit (Modulus of Resilience), kJ/m3 760
1240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
36
Strength to Weight: Bending, points 24
29
Thermal Diffusivity, mm2/s 4.5
4.2
Thermal Shock Resistance, points 21
28

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.060
Chromium (Cr), % 24.5 to 26.5
25 to 27
Copper (Cu), % 2.8 to 3.3
0
Iron (Fe), % 59.9 to 66.3
63.6 to 69
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.8 to 2.3
0
Nickel (Ni), % 4.8 to 6.0
6.0 to 7.0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0 to 0.25