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C91100 Bronze vs. S21904 Stainless Steel

C91100 bronze belongs to the copper alloys classification, while S21904 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is C91100 bronze and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 2.0
17 to 51
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 39
78
Tensile Strength: Ultimate (UTS), MPa 240
700 to 1000
Tensile Strength: Yield (Proof), MPa 170
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 180
290
Maximum Temperature: Mechanical, °C 160
980
Melting Completion (Liquidus), °C 950
1400
Melting Onset (Solidus), °C 820
1350
Specific Heat Capacity, J/kg-K 360
480
Thermal Conductivity, W/m-K 63
14
Thermal Expansion, µm/m-K 18
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 38
15
Density, g/cm3 8.7
7.7
Embodied Carbon, kg CO2/kg material 4.2
3.0
Embodied Energy, MJ/kg 69
43
Embodied Water, L/kg 440
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 140
380 to 2070
Stiffness to Weight: Axial, points 6.7
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 7.7
25 to 36
Strength to Weight: Bending, points 9.9
23 to 29
Thermal Diffusivity, mm2/s 20
3.8
Thermal Shock Resistance, points 9.1
15 to 21

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.2
0
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 82 to 85
0
Iron (Fe), % 0 to 0.25
59.5 to 67.4
Lead (Pb), % 0 to 0.25
0
Manganese (Mn), % 0
8.0 to 10
Nickel (Ni), % 0 to 0.5
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 1.0
0 to 0.045
Silicon (Si), % 0 to 0.0050
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030
Tin (Sn), % 15 to 17
0
Zinc (Zn), % 0 to 0.25
0