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S21904 Stainless Steel vs. C66700 Brass

S21904 stainless steel belongs to the iron alloys classification, while C66700 brass belongs to the copper alloys. There are 29 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 S21904 stainless steel and the bottom bar is C66700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 17 to 51
2.0 to 58
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 78
41
Shear Strength, MPa 510 to 620
250 to 530
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
340 to 690
Tensile Strength: Yield (Proof), MPa 390 to 910
100 to 640

Thermal Properties

Latent Heat of Fusion, J/g 290
180
Maximum Temperature: Mechanical, °C 980
140
Melting Completion (Liquidus), °C 1400
1090
Melting Onset (Solidus), °C 1350
1050
Specific Heat Capacity, J/kg-K 480
390
Thermal Conductivity, W/m-K 14
97
Thermal Expansion, µm/m-K 17
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
17
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
19

Otherwise Unclassified Properties

Base Metal Price, % relative 15
25
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 43
45
Embodied Water, L/kg 160
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
13 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
49 to 1900
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 25 to 36
11 to 23
Strength to Weight: Bending, points 23 to 29
13 to 21
Thermal Diffusivity, mm2/s 3.8
30
Thermal Shock Resistance, points 15 to 21
11 to 23

Alloy Composition

Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
68.5 to 71.5
Iron (Fe), % 59.5 to 67.4
0 to 0.1
Lead (Pb), % 0
0 to 0.070
Manganese (Mn), % 8.0 to 10
0.8 to 1.5
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
26.3 to 30.7
Residuals, % 0
0 to 0.5