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S21904 Stainless Steel vs. C34500 Brass

S21904 stainless steel belongs to the iron alloys classification, while C34500 brass 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 C34500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
100
Elongation at Break, % 17 to 51
12 to 28
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 78
40
Shear Strength, MPa 510 to 620
220 to 260
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
340 to 430
Tensile Strength: Yield (Proof), MPa 390 to 910
120 to 180

Thermal Properties

Latent Heat of Fusion, J/g 290
170
Maximum Temperature: Mechanical, °C 980
120
Melting Completion (Liquidus), °C 1400
910
Melting Onset (Solidus), °C 1350
890
Specific Heat Capacity, J/kg-K 480
380
Thermal Conductivity, W/m-K 14
120
Thermal Expansion, µm/m-K 17
21

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 15
24
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 3.0
2.6
Embodied Energy, MJ/kg 43
45
Embodied Water, L/kg 160
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
42 to 75
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
69 to 160
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 25 to 36
12 to 15
Strength to Weight: Bending, points 23 to 29
13 to 16
Thermal Diffusivity, mm2/s 3.8
37
Thermal Shock Resistance, points 15 to 21
11 to 14

Alloy Composition

Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
62 to 65
Iron (Fe), % 59.5 to 67.4
0 to 0.15
Lead (Pb), % 0
1.5 to 2.5
Manganese (Mn), % 8.0 to 10
0
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
32 to 36.5
Residuals, % 0
0 to 0.4