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S21904 Stainless Steel vs. C91700 Bronze

S21904 stainless steel belongs to the iron alloys classification, while C91700 bronze belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is C91700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
90
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 17 to 51
13
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
41
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
330
Tensile Strength: Yield (Proof), MPa 390 to 910
170

Thermal Properties

Latent Heat of Fusion, J/g 290
190
Maximum Temperature: Mechanical, °C 980
170
Melting Completion (Liquidus), °C 1400
1020
Melting Onset (Solidus), °C 1350
850
Specific Heat Capacity, J/kg-K 480
370
Thermal Conductivity, W/m-K 14
71
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
10
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
10

Otherwise Unclassified Properties

Base Metal Price, % relative 15
36
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 3.0
3.9
Embodied Energy, MJ/kg 43
63
Embodied Water, L/kg 160
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
35
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
140
Stiffness to Weight: Axial, points 14
6.9
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 25 to 36
11
Strength to Weight: Bending, points 23 to 29
12
Thermal Diffusivity, mm2/s 3.8
22
Thermal Shock Resistance, points 15 to 21
12

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
84.2 to 87.5
Iron (Fe), % 59.5 to 67.4
0 to 0.2
Lead (Pb), % 0
0 to 0.25
Manganese (Mn), % 8.0 to 10
0
Nickel (Ni), % 5.5 to 7.5
1.2 to 2.0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.3
Silicon (Si), % 0 to 1.0
0 to 0.0050
Sulfur (S), % 0 to 0.030
0 to 0.050
Tin (Sn), % 0
11.3 to 12.5
Zinc (Zn), % 0
0 to 0.25