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C47940 Brass vs. S21904 Stainless Steel

C47940 brass belongs to the copper alloys classification, while S21904 stainless steel belongs to the iron alloys. There are 27 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 C47940 brass 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, % 14 to 34
17 to 51
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 40
78
Shear Strength, MPa 250 to 310
510 to 620
Tensile Strength: Ultimate (UTS), MPa 380 to 520
700 to 1000
Tensile Strength: Yield (Proof), MPa 160 to 390
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 170
290
Maximum Temperature: Mechanical, °C 130
980
Melting Completion (Liquidus), °C 850
1400
Melting Onset (Solidus), °C 800
1350
Specific Heat Capacity, J/kg-K 380
480
Thermal Conductivity, W/m-K 110
14
Thermal Expansion, µm/m-K 20
17

Otherwise Unclassified Properties

Base Metal Price, % relative 25
15
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 2.8
3.0
Embodied Energy, MJ/kg 47
43
Embodied Water, L/kg 330
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 100
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 740
380 to 2070
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 19
25
Strength to Weight: Axial, points 13 to 17
25 to 36
Strength to Weight: Bending, points 14 to 17
23 to 29
Thermal Diffusivity, mm2/s 36
3.8
Thermal Shock Resistance, points 13 to 17
15 to 21

Alloy Composition

Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 63 to 66
0
Iron (Fe), % 0.1 to 1.0
59.5 to 67.4
Lead (Pb), % 1.0 to 2.0
0
Manganese (Mn), % 0
8.0 to 10
Nickel (Ni), % 0.1 to 0.5
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
Tin (Sn), % 1.2 to 2.0
0
Zinc (Zn), % 28.1 to 34.6
0
Residuals, % 0 to 0.4
0