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C68000 Brass vs. S82121 Stainless Steel

C68000 brass belongs to the copper alloys classification, while S82121 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C68000 brass and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 27
28
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 40
78
Tensile Strength: Ultimate (UTS), MPa 390
730
Tensile Strength: Yield (Proof), MPa 140
510

Thermal Properties

Latent Heat of Fusion, J/g 170
290
Maximum Temperature: Mechanical, °C 120
1020
Melting Completion (Liquidus), °C 880
1430
Melting Onset (Solidus), °C 870
1380
Specific Heat Capacity, J/kg-K 390
480
Thermal Conductivity, W/m-K 96
15
Thermal Expansion, µm/m-K 21
13

Otherwise Unclassified Properties

Base Metal Price, % relative 23
14
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 48
40
Embodied Water, L/kg 330
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82
180
Resilience: Unit (Modulus of Resilience), kJ/m3 95
660
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 20
25
Strength to Weight: Axial, points 14
26
Strength to Weight: Bending, points 15
23
Thermal Diffusivity, mm2/s 31
4.0
Thermal Shock Resistance, points 13
20

Alloy Composition

Aluminum (Al), % 0 to 0.010
0
Carbon (C), % 0
0 to 0.035
Chromium (Cr), % 0
21 to 23
Copper (Cu), % 56 to 60
0.2 to 1.2
Iron (Fe), % 0.25 to 1.3
66.7 to 75.4
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 0.010 to 0.5
1.0 to 2.5
Molybdenum (Mo), % 0
0.3 to 1.3
Nickel (Ni), % 0.2 to 0.8
2.0 to 4.0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.040 to 0.15
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Tin (Sn), % 0.75 to 1.1
0
Zinc (Zn), % 35.6 to 42.8
0
Residuals, % 0 to 0.5
0