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AISI 444 Stainless Steel vs. C18700 Copper

AISI 444 stainless steel belongs to the iron alloys classification, while C18700 copper belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 444 stainless steel and the bottom bar is C18700 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 23
9.0 to 9.6
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
43
Shear Strength, MPa 300
170 to 190
Tensile Strength: Ultimate (UTS), MPa 470
290 to 330
Tensile Strength: Yield (Proof), MPa 310
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 290
210
Maximum Temperature: Mechanical, °C 930
200
Melting Completion (Liquidus), °C 1460
1080
Melting Onset (Solidus), °C 1420
950
Specific Heat Capacity, J/kg-K 480
380
Thermal Conductivity, W/m-K 23
380
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
98
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
99

Otherwise Unclassified Properties

Base Metal Price, % relative 15
30
Density, g/cm3 7.7
9.0
Embodied Carbon, kg CO2/kg material 3.4
2.6
Embodied Energy, MJ/kg 47
41
Embodied Water, L/kg 130
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
24 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 240
240 to 280
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 17
9.0 to 10
Strength to Weight: Bending, points 17
11 to 12
Thermal Diffusivity, mm2/s 6.2
110
Thermal Shock Resistance, points 16
10 to 12

Alloy Composition

Carbon (C), % 0 to 0.025
0
Chromium (Cr), % 17.5 to 19.5
0
Copper (Cu), % 0
98 to 99.2
Iron (Fe), % 73.3 to 80.8
0
Lead (Pb), % 0
0.8 to 1.5
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 1.8 to 2.5
0
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0.2 to 0.8
0
Nitrogen (N), % 0 to 0.035
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.2 to 0.8
0
Residuals, % 0
0 to 0.5