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C81400 Copper vs. AISI 444 Stainless Steel

C81400 copper belongs to the copper alloys classification, while AISI 444 stainless steel belongs to the iron 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 C81400 copper and the bottom bar is AISI 444 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 11
23
Poisson's Ratio 0.34
0.28
Rockwell B Hardness 69
83
Shear Modulus, GPa 41
78
Tensile Strength: Ultimate (UTS), MPa 370
470
Tensile Strength: Yield (Proof), MPa 250
310

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 200
930
Melting Completion (Liquidus), °C 1090
1460
Melting Onset (Solidus), °C 1070
1420
Specific Heat Capacity, J/kg-K 390
480
Thermal Conductivity, W/m-K 260
23
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 61
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 33
15
Density, g/cm3 8.9
7.7
Embodied Carbon, kg CO2/kg material 2.8
3.4
Embodied Energy, MJ/kg 45
47
Embodied Water, L/kg 310
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
95
Resilience: Unit (Modulus of Resilience), kJ/m3 260
240
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 11
17
Strength to Weight: Bending, points 13
17
Thermal Diffusivity, mm2/s 75
6.2
Thermal Shock Resistance, points 13
16

Alloy Composition

Beryllium (Be), % 0.020 to 0.1
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0.6 to 1.0
17.5 to 19.5
Copper (Cu), % 98.4 to 99.38
0
Iron (Fe), % 0
73.3 to 80.8
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0
0 to 1.0
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8
Residuals, % 0 to 0.5
0