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AISI 303 Stainless Steel vs. C18900 Copper

AISI 303 stainless steel belongs to the iron alloys classification, while C18900 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 303 stainless steel and the bottom bar is C18900 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 40 to 51
14 to 48
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 77
43
Shear Strength, MPa 430 to 470
190 to 300
Tensile Strength: Ultimate (UTS), MPa 600 to 690
260 to 500
Tensile Strength: Yield (Proof), MPa 230 to 420
67 to 390

Thermal Properties

Latent Heat of Fusion, J/g 290
210
Maximum Temperature: Mechanical, °C 930
200
Melting Completion (Liquidus), °C 1450
1080
Melting Onset (Solidus), °C 1400
1020
Specific Heat Capacity, J/kg-K 480
390
Thermal Conductivity, W/m-K 16
130
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
30
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
30

Otherwise Unclassified Properties

Base Metal Price, % relative 15
31
Density, g/cm3 7.8
8.9
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 42
42
Embodied Water, L/kg 140
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
65 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
20 to 660
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 21 to 25
8.2 to 16
Strength to Weight: Bending, points 20 to 22
10 to 16
Thermal Diffusivity, mm2/s 4.4
38
Thermal Shock Resistance, points 13 to 15
9.3 to 18

Alloy Composition

Aluminum (Al), % 0
0 to 0.010
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
97.7 to 99.15
Iron (Fe), % 67.3 to 74.9
0
Lead (Pb), % 0
0 to 0.020
Manganese (Mn), % 0 to 2.0
0.1 to 0.3
Nickel (Ni), % 8.0 to 10
0
Phosphorus (P), % 0 to 0.2
0 to 0.050
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0.15 to 0.35
0
Tin (Sn), % 0
0.6 to 0.9
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.5