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C35000 Brass vs. S21904 Stainless Steel

C35000 brass belongs to the copper alloys classification, while S21904 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C35000 brass and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 40
78
Tensile Strength: Ultimate (UTS), MPa 340 to 650
700 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 170
290
Maximum Temperature: Mechanical, °C 120
980
Melting Completion (Liquidus), °C 920
1400
Melting Onset (Solidus), °C 890
1350
Specific Heat Capacity, J/kg-K 380
480
Thermal Conductivity, W/m-K 120
14
Thermal Expansion, µm/m-K 21
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 29
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 23
15
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 2.7
3.0
Embodied Energy, MJ/kg 45
43
Embodied Water, L/kg 320
160

Common Calculations

Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 19
25
Strength to Weight: Axial, points 12 to 22
25 to 36
Strength to Weight: Bending, points 13 to 21
23 to 29
Thermal Diffusivity, mm2/s 37
3.8
Thermal Shock Resistance, points 11 to 22
15 to 21

Alloy Composition

Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 60 to 63
0
Iron (Fe), % 0 to 0.1
59.5 to 67.4
Lead (Pb), % 0.8 to 2.0
0
Manganese (Mn), % 0
8.0 to 10
Nickel (Ni), % 0
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 34.5 to 39.2
0
Residuals, % 0 to 0.4
0